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Ru-Yuan Yang
Graduate Institute of Materials Engineering, National Pingtung University of Science and Technology, Pingtung County, Taiwan

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Research article
Published: 19 May 2021 in Electromagnetics
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This paper presents a design of a compact tri-band bandpass filter simply using a pair of the uniform impedance resonator loaded with an open-circuited stub. By introducing the variable impedance of the open-circuited stub, the proposed design has additional design parameter of the impedance ratio to adjust the resonant modes of the used resonator, so as to more easily achieve the different frequency bands. The resonant frequencies of the oddmode and evenmode of the used resonator are analyzed first in this study. A tri-band filter example is designed at the center frequencies of 1.9, 3.58, and 5.75 GHz, which can be used in 4 G system, 5 G communication system, and wireless local area network, respectively. The designed filter is simulated, fabricated, and then measured. The measurement shows that the insertion loss |S21|, return loss |S11|, and 3 dB fractional bandwidth for the three passbands are less than 0.25/0.37/0.9 dB, larger than 30/15/15 dB, and 17.5/12.2/8.9%, respectively. Moreover, by using the interdigital coupling of the used resonator, four transmission zeros are generated near the passband edges at 1.47, 2.56, 4.05, and 6.48 GHz, realizing high selectivity and high isolation. The measurement is consistent with the simulation, confirming the design concept.

ACS Style

Li-Qin Liu; Qian-Qian Yang; De-Li Chen; Min-Hang Weng; Ru-Yuan Yang. Design of tri-band bandpass filter using uniform impedance resonators loaded with different impedance stubs. Electromagnetics 2021, 41, 253 -262.

AMA Style

Li-Qin Liu, Qian-Qian Yang, De-Li Chen, Min-Hang Weng, Ru-Yuan Yang. Design of tri-band bandpass filter using uniform impedance resonators loaded with different impedance stubs. Electromagnetics. 2021; 41 (4):253-262.

Chicago/Turabian Style

Li-Qin Liu; Qian-Qian Yang; De-Li Chen; Min-Hang Weng; Ru-Yuan Yang. 2021. "Design of tri-band bandpass filter using uniform impedance resonators loaded with different impedance stubs." Electromagnetics 41, no. 4: 253-262.

Research article
Published: 29 March 2021 in Electromagnetics
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In this paper, a compact wideband diplexer is designed by combining two wideband filters based on stub-loaded square ring resonator (SLSRR). By adjusting the length of the stub or square ring, the passband bandwidth can be adjusted. The first channel has a center frequency of 4.3 GHz with a fractional bandwidth (FBW) of 50%. The second channel has a center frequency of 8.75 GHz with the FBW of 51.4%. The average isolation between the two channels is averagely greater than 25 dB. The designed diplexer has the advantages of easy design of wideband, simple structure, and informal matching of impedance.

ACS Style

Ping Zhang; Min-Hang Weng; Ru-Yuan Yang. A compact wideband diplexer using stub-loaded square ring resonators. Electromagnetics 2021, 41, 167 -184.

AMA Style

Ping Zhang, Min-Hang Weng, Ru-Yuan Yang. A compact wideband diplexer using stub-loaded square ring resonators. Electromagnetics. 2021; 41 (3):167-184.

Chicago/Turabian Style

Ping Zhang; Min-Hang Weng; Ru-Yuan Yang. 2021. "A compact wideband diplexer using stub-loaded square ring resonators." Electromagnetics 41, no. 3: 167-184.

Journal article
Published: 09 March 2021 in Membranes
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Environmental and economic concerns are driving the demand for electric vehicles. However, their development for mass transportation hinges largely on improvements in the separators in lithium-ion batteries (LIBs), the preferred energy source. In this study, innovative separators for LIBs were fabricated by near-field electrospinning (NFES) and the sol-gel method. Using NFES, poly (vinylidene fluoride) (PVDF) fibers were fabricated. Then, PVDF membranes with pores of 220 nm and 450 nm were sandwiched between a monolayer and bilayer of the electrospun fibers. Nanoceramic material with organic resin, formed by the sol-gel method, was coated onto A4 paper, rice paper, nonwoven fabric, and carbon synthetic fabric. Properties of these separators were compared with those of a commercial polypropylene (PP) separator using a scanning electron microscope (SEM), microtensile testing, differential scanning calorimetry (DSC), ion-conductivity measurement, cyclic voltammetry (CV), and charge-discharge cycling. The results indicate that the 220 nm PVDF membrane sandwiched between a bilayer of electrospun fibers had excellent ionic conductivity (~0.57 mS/cm), a porosity of ~70%, an endothermic peak of ~175 °C, better specific capacitance (~356 mAh/g), a higher melting temperature (~160 °C), and a stable cycle performance. The sol-gel coated nonwoven fabric had ionic conductivity, porosity, and specific capacitance of ~0.96 mS/cm., ~64%, and ~220 mAh/g, respectively, and excellent thermal stability despite having a lower specific capacitance (65% of PP separator) and no peak below 270 °C. The present study provides a significant step toward the innovation of materials and processes for fabricating LIB separators.

ACS Style

Mark Francisco; Cheng-Tang Pan; Bo-Hao Liao; Mao-Sung Wu; Ru-Yuan Yang; Jay Chu; Zhi-Hong Wen; Chien-Feng Liao; Yow-Ling Shiue. Fabrication and Analysis of Near-Field Electrospun PVDF Fibers with Sol-Gel Coating for Lithium-Ion Battery Separator. Membranes 2021, 11, 186 .

AMA Style

Mark Francisco, Cheng-Tang Pan, Bo-Hao Liao, Mao-Sung Wu, Ru-Yuan Yang, Jay Chu, Zhi-Hong Wen, Chien-Feng Liao, Yow-Ling Shiue. Fabrication and Analysis of Near-Field Electrospun PVDF Fibers with Sol-Gel Coating for Lithium-Ion Battery Separator. Membranes. 2021; 11 (3):186.

Chicago/Turabian Style

Mark Francisco; Cheng-Tang Pan; Bo-Hao Liao; Mao-Sung Wu; Ru-Yuan Yang; Jay Chu; Zhi-Hong Wen; Chien-Feng Liao; Yow-Ling Shiue. 2021. "Fabrication and Analysis of Near-Field Electrospun PVDF Fibers with Sol-Gel Coating for Lithium-Ion Battery Separator." Membranes 11, no. 3: 186.

Journal article
Published: 26 February 2021 in Sustainability
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The fifth-generation (5G) network has special communication and security requirements including high reliability, low latency, precise automatic control, secure covert transmission, and evidence traceability. The 5G network combined with blockchain technology just meets this demand, so it is driving a rapidly growing volume of patent applications. This study proposes application scenarios, architecture diagrams, and patent analysis methods for blockchain-based 5G network technologies, beginning with a network architecture using mobile edge computing (MEC) and blockchain as independent platform components to solve MEC load pressure. In the patent analysis, a patent cluster map of blockchain-based 5G networks is proposed to analyze the intersection of technical application fields. The bottleneck period of technological development is presented for leading countries and enterprises in the technological development of blockchain-based 5G network, highlighting relative advantages and disadvantages. Specifically, to extract the core international patent classification (IPC) key technologies and their mutual interrelatedness, we use network topology analysis to establish an IPC network topology diagram through node global and local topology characteristics, thus revealing hotspots of IPC technology research and the characteristics of the technology relationship system. The findings provide a very useful reference for the formulation of government strategy to assist in the implementation and development of blockchain-based 5G network technologies for future smart cities.

ACS Style

Fei Gao; De-Li Chen; Min-Hang Weng; Ru-Yuan Yang. Revealing Development Trends in Blockchain-Based 5G Network Technologies through Patent Analysis. Sustainability 2021, 13, 2548 .

AMA Style

Fei Gao, De-Li Chen, Min-Hang Weng, Ru-Yuan Yang. Revealing Development Trends in Blockchain-Based 5G Network Technologies through Patent Analysis. Sustainability. 2021; 13 (5):2548.

Chicago/Turabian Style

Fei Gao; De-Li Chen; Min-Hang Weng; Ru-Yuan Yang. 2021. "Revealing Development Trends in Blockchain-Based 5G Network Technologies through Patent Analysis." Sustainability 13, no. 5: 2548.

Research article
Published: 25 January 2021 in Electromagnetics
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This paper presents a high band selectivity tri-band bandpass filter with controllable frequency and transmission zeros. This tri-band bandpass filter is mainly constructed by using two pairs of dual-stubs loaded resonators in a symmetrical structure. Three passbands could be independently controlled to achieve the desired frequency and have transmission zeros created close to the passbands to improve the band selectivity. Three resonant models are provided in the proposed filter to obtain different passband frequencies. The passbands of the designed filter are designed at 1.82, 2.44, and 3.49 GHz, which can be used for global system for mobile communications (GSM), wireless local area network (WLAN), and Worldwide Interoperability for Microwave Access (WiMAX), respectively. The simulated results and measured results of the designed tri-band bandpass filter have a good agreement.

ACS Style

YuanMo Lin; Min-Hang Weng; Ping Zhang; Ru-Yuan Yang. A tri-band filter with controllable frequency and transmission zeros using dual-stubs loaded resonators. Electromagnetics 2021, 41, 131 -141.

AMA Style

YuanMo Lin, Min-Hang Weng, Ping Zhang, Ru-Yuan Yang. A tri-band filter with controllable frequency and transmission zeros using dual-stubs loaded resonators. Electromagnetics. 2021; 41 (2):131-141.

Chicago/Turabian Style

YuanMo Lin; Min-Hang Weng; Ping Zhang; Ru-Yuan Yang. 2021. "A tri-band filter with controllable frequency and transmission zeros using dual-stubs loaded resonators." Electromagnetics 41, no. 2: 131-141.

Journal article
Published: 11 January 2021 in Electronics
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In this paper, we present a dual-band microstrip bandpass filter (BPF) with an improved stopband, which was constructed by a quad-mode stub-loaded resonator (SLR). Since the SLR is able to produce multiresonance within a single unit, the area saving is significant. The proposed quad-mode SLR was implemented by two stubs allocated at symmetry places, thus the even-/odd-mode can be applied to analysis the resonance. Moreover, to shift the spurious passband, the step impedance structure was applied to shift the harmonic resonance to the higher frequency. Design procedure for high performance dual-band BPF is proposed, and filter examples were designed for wireless local area network (WLAN) of 2.4/5.2 GHz. The measured insertion losses, return losses and fractional bandwidths (FBW) are 1.43 dB, 10 dB, and 14.8% at 2.4 GHz and 1.34 dB, 10 dB, and 12.9% at 5.2 GHz. Moreover, by applying two quarter-wavelength stubs on the input/output ports, the passband selectivity with an isolation of 40 dB can be achieved. The simulation and measurement have a close match, verifying the design concept.

ACS Style

Min-Hang Weng; Chun-Yueh Huang; Shi-Wei Dai; Ru-Yuan Yang. An Improved Stopband Dual-Band Filter Using Quad-Mode Stub-Loaded Resonators. Electronics 2021, 10, 142 .

AMA Style

Min-Hang Weng, Chun-Yueh Huang, Shi-Wei Dai, Ru-Yuan Yang. An Improved Stopband Dual-Band Filter Using Quad-Mode Stub-Loaded Resonators. Electronics. 2021; 10 (2):142.

Chicago/Turabian Style

Min-Hang Weng; Chun-Yueh Huang; Shi-Wei Dai; Ru-Yuan Yang. 2021. "An Improved Stopband Dual-Band Filter Using Quad-Mode Stub-Loaded Resonators." Electronics 10, no. 2: 142.

Journal article
Published: 30 December 2020 in Electronics
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This paper presents a miniaturized bandpass filter, which uses half mode substrate integrated waveguide (HMSIW) structure with embedded step impedance structure (SIS). By embedding the stepped impedance structure into the top metal of the waveguide cavity, the center frequency can be quickly shifted to a lower frequency. The operating center frequency of the proposed bandpass filter (BPF) using HMSIW resonators with embedded SIS is tunable as functions of the parameters of the SIS. The design curve is provided. A filter example of the center frequency of the filter at 3.5 GHz is fabricated and measured, having the insertion loss |S21| less than 3 dB, and the return loss |S11| greater than 10 dB. The transmission zeros are located at 2.95 GHz and 3.95 GHz on both sides of the passband, both of which are lower than 30 dB. The simulation result and the measured response conform to the proposed design concept. The proposed HMSIW filter design is in line with the current 5G communication trend.

ACS Style

Min-Hang Weng; Chin-Yi Tsai; De-Li Chen; Yi-Chun Chung; Ru-Yuan Yang. A Bandpass Filter Using Half Mode SIW Structure with Step Impedance Resonator. Electronics 2020, 10, 51 .

AMA Style

Min-Hang Weng, Chin-Yi Tsai, De-Li Chen, Yi-Chun Chung, Ru-Yuan Yang. A Bandpass Filter Using Half Mode SIW Structure with Step Impedance Resonator. Electronics. 2020; 10 (1):51.

Chicago/Turabian Style

Min-Hang Weng; Chin-Yi Tsai; De-Li Chen; Yi-Chun Chung; Ru-Yuan Yang. 2020. "A Bandpass Filter Using Half Mode SIW Structure with Step Impedance Resonator." Electronics 10, no. 1: 51.

Journal article
Published: 27 March 2020 in Materials
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This paper reports the improvement of microstructural and hardness properties of 3 mol% yttria-stabilized zirconia (3Y-TZP) ceramics with nano TiO2 powders (with 0, 0.9, 1.8, and 2.7 wt%) added using a low-temperature microwave-assisted sintering of 1250 °C. Even at such a low sintering temperature, all sintered samples had the main phase of tetragonal zirconia (t-ZrO2) without the appearance of the secondary monoclinic phase or TiO2 phase, and had high relative densities, larger than 95%. The grain growth was well developed, and the grain sizes were around 300–600 nm. The Ti and O elements appeared at the grain and grain boundary and increased with the increased nano TiO2 contents identified by the element analysis, although the TiO2 phase did not appear in the X-ray pattern. The Vickers hardness was in the range of 10.5 to 14.5 GPa, which first increased with increasing content till 0.9 wt% and then decreased. With citric acid corrosion treatment for 10 h, the Vickers hardness only decreased from 14.34 GPa to 13.55 GPa with the addition of 0.9 wt% nano TiO2 powder. The experiment results showed that 0.9 wt% nano TiO2 addition can improve the densification as well as the Vickers hardness under a low temperature of microwave-assisted sintering.

ACS Style

Min-Hang Weng; Cheng-Xun Lin; Cian-Song Huang; Chin-Yi Tsai; Ru-Yuan Yang. Improved Microstructure and Hardness Properties of Low-Temperature Microwave-Sintered Y2O3 Stabilized ZrO2 Ceramics with Additions of Nano TiO2 Powders. Materials 2020, 13, 1546 .

AMA Style

Min-Hang Weng, Cheng-Xun Lin, Cian-Song Huang, Chin-Yi Tsai, Ru-Yuan Yang. Improved Microstructure and Hardness Properties of Low-Temperature Microwave-Sintered Y2O3 Stabilized ZrO2 Ceramics with Additions of Nano TiO2 Powders. Materials. 2020; 13 (7):1546.

Chicago/Turabian Style

Min-Hang Weng; Cheng-Xun Lin; Cian-Song Huang; Chin-Yi Tsai; Ru-Yuan Yang. 2020. "Improved Microstructure and Hardness Properties of Low-Temperature Microwave-Sintered Y2O3 Stabilized ZrO2 Ceramics with Additions of Nano TiO2 Powders." Materials 13, no. 7: 1546.

Journal article
Published: 17 January 2020 in Electronics
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In this paper, a stub-loaded square ring resonator (SLSRR) is analyzed and applied to design a very simple and compact wideband bandpass filter structure. Resonant modes dependent on the structure parameters of the SLSRR are analyzed first, and then the first two modes are used to achieve a required passband. The input and output terminals are supplied with high impedance and strong coupling to provide sufficient coupling energy. Two wideband filter examples are designed, manufactured, and measured using the SLSRRs. The first filter is a wideband filter with a wide upper stopband, and the second filter is a dual wideband filter with a notched stopband between two passbands. The two filter examples are designed, fabricated, and measured to verify the design concept and present the advantages of easy design and a simple and compact structure.

ACS Style

Ping Zhang; Liqin Liu; Deli Chen; Min-Hang Weng; Ru-Yuan Yang. Application of a Stub-Loaded Square Ring Resonator for Wideband Bandpass Filter Design. Electronics 2020, 9, 176 .

AMA Style

Ping Zhang, Liqin Liu, Deli Chen, Min-Hang Weng, Ru-Yuan Yang. Application of a Stub-Loaded Square Ring Resonator for Wideband Bandpass Filter Design. Electronics. 2020; 9 (1):176.

Chicago/Turabian Style

Ping Zhang; Liqin Liu; Deli Chen; Min-Hang Weng; Ru-Yuan Yang. 2020. "Application of a Stub-Loaded Square Ring Resonator for Wideband Bandpass Filter Design." Electronics 9, no. 1: 176.

Journal article
Published: 01 January 2020 in Progress In Electromagnetics Research M
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ACS Style

Liqin Liu; Min-Hang Weng; Yabin Weng; Chin-Yi Tsai; Ru-Yuan Yang. APPLICATION OF STUB-LOADED STEP-IMPEDANCE RESONATOR FOR QUINT-BAND BANDPASS FILTER DESIGN. Progress In Electromagnetics Research M 2020, 96, 169 -179.

AMA Style

Liqin Liu, Min-Hang Weng, Yabin Weng, Chin-Yi Tsai, Ru-Yuan Yang. APPLICATION OF STUB-LOADED STEP-IMPEDANCE RESONATOR FOR QUINT-BAND BANDPASS FILTER DESIGN. Progress In Electromagnetics Research M. 2020; 96 ():169-179.

Chicago/Turabian Style

Liqin Liu; Min-Hang Weng; Yabin Weng; Chin-Yi Tsai; Ru-Yuan Yang. 2020. "APPLICATION OF STUB-LOADED STEP-IMPEDANCE RESONATOR FOR QUINT-BAND BANDPASS FILTER DESIGN." Progress In Electromagnetics Research M 96, no. : 169-179.

Journal article
Published: 13 December 2019 in Materials
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The effect of CuO/B2O3 additions on the sintering behaviors, microstructures, and microwave dielectric properties of 0.95LaAlO3–0.05CaTiO3 ceramics is investigated. It is found that the sintering temperatures are lowered efficiently from 1600 °C to 1350 °C, as 1 wt % CuO, 1 wt % B2O3, and 0.5 wt % CuO +0.5 wt % B2O3 are used as the sintering aids due to the appearance of the liquid phase sintering. The microwave dielectric properties of 0.95LaAlO3–0.05CaTiO3 ceramics with the sintering aid additions are strongly related to the densification and the microstructure of the sintered ceramics. At the sintering temperature of 1300 °C, the 0.95LaAlO3–0.05CaTiO3 ceramic with 0.5 wt % CuO + 0.5 wt % B2O3 addition shows the best dielectric properties, including a dielectric constant (εr) of 21, approximate quality factor (Q × f) of 22,500 GHz, and a temperature coefficient of the resonant frequency (τf) of −3 ppm/°C.

ACS Style

Min-Hang Weng; Chihng-Tsung Liauh; Shueei-Muh Lin; Hung-Hsiang Wang; Ru-Yuan Yang. Sintering Behaviors, Microstructure, and Microwave Dielectric Properties of CaTiO3–LaAlO3 Ceramics Using CuO/B2O3 Additions. Materials 2019, 12, 4187 .

AMA Style

Min-Hang Weng, Chihng-Tsung Liauh, Shueei-Muh Lin, Hung-Hsiang Wang, Ru-Yuan Yang. Sintering Behaviors, Microstructure, and Microwave Dielectric Properties of CaTiO3–LaAlO3 Ceramics Using CuO/B2O3 Additions. Materials. 2019; 12 (24):4187.

Chicago/Turabian Style

Min-Hang Weng; Chihng-Tsung Liauh; Shueei-Muh Lin; Hung-Hsiang Wang; Ru-Yuan Yang. 2019. "Sintering Behaviors, Microstructure, and Microwave Dielectric Properties of CaTiO3–LaAlO3 Ceramics Using CuO/B2O3 Additions." Materials 12, no. 24: 4187.

Journal article
Published: 13 December 2019 in Electronics
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In this paper, we present a simple method to design a miniaturized wideband bandpass filter with suppression of the third harmonic, using only two quarter-wavelength stepped-impedance resonators (SIRs). The resonant modes of the quarter-wavelength SIR, depending on the impedance ratio (K) and electrical length ratio (α), are discussed first. As to setting the resonant frequency of the SIR for the lower band edge of the required band, the size parameters of two quarter-wavelength SIRs can be determined by selecting the desired impedance ratio (K) and length ratio (α). By using the opposite directional arrangement of two SIRs with direct taped input/output ports, the wideband response can be formed. A filter example is shown in this study to address this simple design procedure. The measured results of the fabricated filter have a wide passband response from 3.3 to 5.8 GHz, with an insertion loss of 1.5 dB, a return loss of 20 dB, an extended bandwidth ration of 55%, a low-average group delay of less than 0.75 ns, and a stopband from 6 to 12 GHz, with an attenuation level of 20 dB. Due to the similar 0° feeding, a transmission zero at 8.3 GHz appears near the band edge; thus, improving the band selectivity. The proposed filter can have a very simple structure and a miniature size. Simulated results and measured results are in good agreement.

ACS Style

Liqin Liu; Ping Zhang; Min-Hang Weng; Chin-Yi Tsai; Ru-Yuan Yang. A Miniaturized Wideband Bandpass Filter Using Quarter-Wavelength Stepped-Impedance Resonators. Electronics 2019, 8, 1540 .

AMA Style

Liqin Liu, Ping Zhang, Min-Hang Weng, Chin-Yi Tsai, Ru-Yuan Yang. A Miniaturized Wideband Bandpass Filter Using Quarter-Wavelength Stepped-Impedance Resonators. Electronics. 2019; 8 (12):1540.

Chicago/Turabian Style

Liqin Liu; Ping Zhang; Min-Hang Weng; Chin-Yi Tsai; Ru-Yuan Yang. 2019. "A Miniaturized Wideband Bandpass Filter Using Quarter-Wavelength Stepped-Impedance Resonators." Electronics 8, no. 12: 1540.

Research article
Published: 26 November 2019 in Microwave and Optical Technology Letters
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This article proposes a design of miniaturized high selectivity band‐pass filter by using a dual‐mode patch resonator with two pairs of uniform slots set in the four corners. The effect of the pairs of the slots on the resonant modes of the square patch resonator is investigated first. For filter design, the slots set in the four corners of the patch resonator are provided as the perturbation elements to tune the resonant modes and thus form the filter response. The pairs of the slots reduce the fundamental resonant frequency and thus miniaturize the filter size. The designed filter is simulated and measured at 1.95 GHz for the fifth generation applications with narrow bandwidth. High band selectivity is obtained due to the creation of transmission zeros near the passband edges. The filter performances are measured by network analyzer and the results are discussed.

ACS Style

Fang‐Li Zhao; Min‐Hang Weng; Chin‐Yi Tsai; Ru‐Yuan Yang; Hong‐Zheng Lai; Shih‐Kun Liu. A miniaturized high selectivity band‐pass filter using a dual‐mode patch resonator with two pairs of slots. Microwave and Optical Technology Letters 2019, 62, 1145 -1151.

AMA Style

Fang‐Li Zhao, Min‐Hang Weng, Chin‐Yi Tsai, Ru‐Yuan Yang, Hong‐Zheng Lai, Shih‐Kun Liu. A miniaturized high selectivity band‐pass filter using a dual‐mode patch resonator with two pairs of slots. Microwave and Optical Technology Letters. 2019; 62 (3):1145-1151.

Chicago/Turabian Style

Fang‐Li Zhao; Min‐Hang Weng; Chin‐Yi Tsai; Ru‐Yuan Yang; Hong‐Zheng Lai; Shih‐Kun Liu. 2019. "A miniaturized high selectivity band‐pass filter using a dual‐mode patch resonator with two pairs of slots." Microwave and Optical Technology Letters 62, no. 3: 1145-1151.

Articles
Published: 21 November 2019 in Journal of Electromagnetic Waves and Applications
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The paper presents a simple method to design a tri-band bandpass filter (BPF) using only two pairs of open-loop uniform impedance resonators (OLUIRs). The three passbands can be designed independently by selecting the lengths of two pairs of the OLUIRs. The design procedure is described in this paper. A tri-bandpass filter example is designed at 1.93, 2.6 and 3.9 GHz that can be applied to digital enhanced cordless telecommunications (DECT) and worldwide interoperability for microwave access (WiMAX). By means of the cross-coupling effect with different coupling paths, several transmission zeros appear near the passbands, thus enhancing the selectivity of the passbands. The measured results of the fabricated tri-BPF match the simulated results and confirm the design concept.

ACS Style

Min-Hang Weng; Che-Wei Hsu; YuanMo Lin; Chin-Yi Tsai; Ru-Yuan Yang. A simple method to design a tri-bandpass filter using open-loop uniform impedance resonators. Journal of Electromagnetic Waves and Applications 2019, 34, 103 -115.

AMA Style

Min-Hang Weng, Che-Wei Hsu, YuanMo Lin, Chin-Yi Tsai, Ru-Yuan Yang. A simple method to design a tri-bandpass filter using open-loop uniform impedance resonators. Journal of Electromagnetic Waves and Applications. 2019; 34 (1):103-115.

Chicago/Turabian Style

Min-Hang Weng; Che-Wei Hsu; YuanMo Lin; Chin-Yi Tsai; Ru-Yuan Yang. 2019. "A simple method to design a tri-bandpass filter using open-loop uniform impedance resonators." Journal of Electromagnetic Waves and Applications 34, no. 1: 103-115.

Journal article
Published: 08 November 2019 in Electronics
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This paper presents an ultra-wideband bandpass filter (UWB-BPF) with a notch band and a wide upper stopband. Two pairs of half-wavelength high-impedance line resonators tightly and strongly coupled to the input/output lines are used to provide the wideband responses. The first UWB responses of 3.4–5.0 GHz and the second UWB of 6.0–10.0 GHz are designed independently first and then combined together for the application of a direct-sequence ultra-wideband bandpass (DS-UWB) system. Without using any extra bandstop structure, a notch band at 5.2 GHz can be obtained. The fabricated UWB-BPF with a compact circuit size exhibits good passband performances including insertion losses of 1 ± 0.3 and 2 ± 0.4 dB for first and second passbands, respectively, a high isolation at 5.2 GHz with an attenuation level of 22.7 dB, and wide upper stopband responses from 11 GHz to 19 GHz, simultaneously. The measured results also exhibit good agreement with the simulated results.

ACS Style

Min-Hang Weng; Che-Wei Hsu; Siang-Wen Lan; Ru-Yuan Yang. An Ultra-Wideband Bandpass Filter with a Notch Band and Wide Upper Bandstop Performances. Electronics 2019, 8, 1316 .

AMA Style

Min-Hang Weng, Che-Wei Hsu, Siang-Wen Lan, Ru-Yuan Yang. An Ultra-Wideband Bandpass Filter with a Notch Band and Wide Upper Bandstop Performances. Electronics. 2019; 8 (11):1316.

Chicago/Turabian Style

Min-Hang Weng; Che-Wei Hsu; Siang-Wen Lan; Ru-Yuan Yang. 2019. "An Ultra-Wideband Bandpass Filter with a Notch Band and Wide Upper Bandstop Performances." Electronics 8, no. 11: 1316.

Journal article
Published: 08 October 2019 in IEEE Access
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This paper presents a novel dual-band bandpass filter with narrow and wide passband simultaneously and a wide stopband. The dual-band bandpass filter is implemented using a steppedimpedance ring loaded resonator (SIRLR). The properties of the SIRLR are analyzed in detail based on the even-and odd-mode equivalent circuits. Resonant modes, excited by SIRLR, can be controlled and used to form a narrow passband at 2.4 GHz with bandwidth ratio of 8% and a wide passband from 3 to 5 GHz, with insertion losses less than 1.5 dB for both two passbands. Three transmission zeros are created near the passband edge to improve the passband selectivity and achieve a sharp cutoff skirt (over 60 dB/GHz). In addition, for wide stopband consideration, rectangular stub loaded resonators (RSLRs) are tapped on the input and output ports of above dual-band filter without destroying the dual-band performances. Thus, the proposed dual-band filter with a wide stopband region from 5 to 20 GHz with a rejection level of 25 dB is also achieved. The measured results show a good agreement with the simulated results.

ACS Style

Min-Hang Weng; Siang-Wen Lan; Shoou-Jinn Chang; Ru-Yuan Yang. Design of Dual-Band Bandpass Filter With Simultaneous Narrow- and Wide-Bandwidth and a Wide Stopband. IEEE Access 2019, 7, 147694 -147703.

AMA Style

Min-Hang Weng, Siang-Wen Lan, Shoou-Jinn Chang, Ru-Yuan Yang. Design of Dual-Band Bandpass Filter With Simultaneous Narrow- and Wide-Bandwidth and a Wide Stopband. IEEE Access. 2019; 7 (99):147694-147703.

Chicago/Turabian Style

Min-Hang Weng; Siang-Wen Lan; Shoou-Jinn Chang; Ru-Yuan Yang. 2019. "Design of Dual-Band Bandpass Filter With Simultaneous Narrow- and Wide-Bandwidth and a Wide Stopband." IEEE Access 7, no. 99: 147694-147703.

Journal article
Published: 26 May 2017 in Ceramics International
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Green emitting LiBa1−x-yPO4: xTb3+,yCe3+ phosphors have been synthesized by solid state reaction method and investigated by means of microstructure, photoluminescence, and temperature dependence of luminescence property. Effective energy transfer occurs from Ce3+ to Tb3+ in LiBaPO4 host due to the observed spectral overlap between the emission band of Ce3+ and the excitation band of Tb3+. We have also shown that the energy transfer from Ce3+ and Tb3+ in LiBaPO4 host was demonstrated to be resonant type via a dipole-dipole interaction mechanism with the energy transfer critical distance of 0.9077 nm. Furthermore, LiBa0.75PO4:0.2Tb3+,0.05Ce3+ phosphor shows high thermally stable luminescence comparable to commercial phosphor YAG:Ce3+. All the characteristics suggest that LiBaPO4:Tb3+,Ce3+ is a good green phosphor candidate for creating white light in phosphor-conversion WLED.

ACS Style

Hsuan-Lin Lai; Ru-Yuan Yang; Shoou-Jinn Chang. Thermally stable luminescence properties and energy transfer of green-emitting LiBaPO 4 : Tb 3+ , Ce 3+ Phosphor. Ceramics International 2017, 43, S688 -S693.

AMA Style

Hsuan-Lin Lai, Ru-Yuan Yang, Shoou-Jinn Chang. Thermally stable luminescence properties and energy transfer of green-emitting LiBaPO 4 : Tb 3+ , Ce 3+ Phosphor. Ceramics International. 2017; 43 ():S688-S693.

Chicago/Turabian Style

Hsuan-Lin Lai; Ru-Yuan Yang; Shoou-Jinn Chang. 2017. "Thermally stable luminescence properties and energy transfer of green-emitting LiBaPO 4 : Tb 3+ , Ce 3+ Phosphor." Ceramics International 43, no. : S688-S693.

Journal article
Published: 26 May 2017 in Ceramics International
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This paper investigates the influence of various sintering temperatures on the microstructure and photoluminescence properties of KSr0.99PO4:Eu0.013+ phosphors prepared by microwave-assisted sintering. The package properties of KSr0.99PO4:Eu0.013+ phosphors combined with a n-UV InGaN chip are also investigated. To achieve maximum luminescence, the optimum sintering temperature for KSr0.99PO4:Eu0.013+ phosphors prepared by microwave assisted-sintering is 1200 °C due to the pure phase and uniform and large particles (as identified by XRD and SEM). The results of the package properties showed that KSr1−xPO4:xEu3+ (x = 0.01) phosphor sintered at 1200 °C by microwave-assisted sintering could emit orange-red light via the n-UV InGaN chip.

ACS Style

Ru-Yuan Yang; Yu-Ming Peng; Hsuan-Lin Lai; Yan-Kuin Su; Shoou-Jinn Chang. The optimum sintering condition for KSrPO 4 :Eu 3+ phosphors applied in WLEDs. Ceramics International 2017, 43, S682 -S687.

AMA Style

Ru-Yuan Yang, Yu-Ming Peng, Hsuan-Lin Lai, Yan-Kuin Su, Shoou-Jinn Chang. The optimum sintering condition for KSrPO 4 :Eu 3+ phosphors applied in WLEDs. Ceramics International. 2017; 43 ():S682-S687.

Chicago/Turabian Style

Ru-Yuan Yang; Yu-Ming Peng; Hsuan-Lin Lai; Yan-Kuin Su; Shoou-Jinn Chang. 2017. "The optimum sintering condition for KSrPO 4 :Eu 3+ phosphors applied in WLEDs." Ceramics International 43, no. : S682-S687.

Journal article
Published: 01 October 2016 in Ceramics International
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Shuo-Fu Hsu; Min-Hang Weng; Jyh-Horng Chou; Chun-Hsiung Fang; Ru-Yuan Yang. Effect of the Ti-target arc current on the properties of Ti-doped ZnO thin films prepared by dual-target cathodic arc plasma deposition. Ceramics International 2016, 42, 14438 -14442.

AMA Style

Shuo-Fu Hsu, Min-Hang Weng, Jyh-Horng Chou, Chun-Hsiung Fang, Ru-Yuan Yang. Effect of the Ti-target arc current on the properties of Ti-doped ZnO thin films prepared by dual-target cathodic arc plasma deposition. Ceramics International. 2016; 42 (13):14438-14442.

Chicago/Turabian Style

Shuo-Fu Hsu; Min-Hang Weng; Jyh-Horng Chou; Chun-Hsiung Fang; Ru-Yuan Yang. 2016. "Effect of the Ti-target arc current on the properties of Ti-doped ZnO thin films prepared by dual-target cathodic arc plasma deposition." Ceramics International 42, no. 13: 14438-14442.

Research article
Published: 28 August 2016 in Journal of Nanomaterials
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Cathodic vacuum arc deposition (CVAD) can obtain a good quality thin film with a low growth temperature and a high deposition rate, thus matching the requirement of film deposition on flexible electronics. This paper reported the room-temperature deposition of zinc oxide (ZnO) thin films deposited by CVAD on polyethylene terephthalate (PET) substrate. Microstructure, optical, and electrical measurements of the deposited ZnO thin films were investigated with various O2/Ar gas flow ratios from 6 : 1 to 10 : 1. The films showed hexagonal wurtzite crystal structure. With increasing the O2/Ar gas flow ratios, the c -axis (002) oriented intensity decreased. The crystal sizes were around 16.03 nm to 23.42 nm. The average transmittance values in the visible range of all deposited ZnO films were higher than 83% and the calculated band gaps from the absorption data were found to be around 3.1 to 3.2 eV. The resistivity had a minimum value in the 3.65 × 10−3 Ω·cm under the O2/Ar gas flow ratio of 8 : 1. The luminescence mechanisms of the deposited film were also investigated to understand the defect types of room-temperature grown ZnO films.

ACS Style

Chien-Wei Huang; Ru-Yuan Yang; Cheng-Tang Pan; Min-Hang Weng. Effect of O2/Ar Gas Flow Ratios on Properties of Cathodic Vacuum Arc Deposited ZnO Thin Films on Polyethylene Terephthalate Substrate. Journal of Nanomaterials 2016, 2016, 1 -6.

AMA Style

Chien-Wei Huang, Ru-Yuan Yang, Cheng-Tang Pan, Min-Hang Weng. Effect of O2/Ar Gas Flow Ratios on Properties of Cathodic Vacuum Arc Deposited ZnO Thin Films on Polyethylene Terephthalate Substrate. Journal of Nanomaterials. 2016; 2016 ():1-6.

Chicago/Turabian Style

Chien-Wei Huang; Ru-Yuan Yang; Cheng-Tang Pan; Min-Hang Weng. 2016. "Effect of O2/Ar Gas Flow Ratios on Properties of Cathodic Vacuum Arc Deposited ZnO Thin Films on Polyethylene Terephthalate Substrate." Journal of Nanomaterials 2016, no. : 1-6.