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A novel wideband high-power single-pole two-throw (SP2T) switch based on gap waveguide technology is presented in this article. The proposed switch has a SP2T structure and consists of three standard WR62 waveguide ports. Due to the advantage of gap waveguide technology, the switch design structure requires no electrical contact between its different parts, and the leakage of the electromagnetic wave is suppressed. The proposed switch has an air gap between its parts. As a result, the sliding part of the switch can be moved freely to change the switch states. Consequently, a low-precision and low-cost fabrication can be utilized. The simulation and measurement of the proposed switch indicate that a 50% operating frequency bandwidth covering the range of 12–20 GHz can be achieved. The switch input return-loss is better than 15 dB within the frequency bandwidth, whereas the insertion loss and isolation levels of the proposed design are above 0.15 dB and better than 65 dB, respectively.
Abdullah J. Alazemi; Ali Farahbakhsh; Davoud Zarifi. A 12–20 GHz Wideband High-Power SP2T Switch Based on Gap Waveguide Technology. Sensors 2021, 21, 5396 .
AMA StyleAbdullah J. Alazemi, Ali Farahbakhsh, Davoud Zarifi. A 12–20 GHz Wideband High-Power SP2T Switch Based on Gap Waveguide Technology. Sensors. 2021; 21 (16):5396.
Chicago/Turabian StyleAbdullah J. Alazemi; Ali Farahbakhsh; Davoud Zarifi. 2021. "A 12–20 GHz Wideband High-Power SP2T Switch Based on Gap Waveguide Technology." Sensors 21, no. 16: 5396.
This article presents a wideband design of a rotary joint based on groove gap waveguide technology. The proposed design includes two coax-to-groove gap waveguide (GGW) transitions, connected together in a back-to-back arrangement. As the gap waveguide structure does not require electrical connections between different parts, the rotor part is placed on top of the stator with an air gap distance while the wave leakage is suppressed. Therefore, the rotating choke, which is a critical and bulky part in the previous designs, is eliminated. By introducing some matching posts in the structure, a wideband design is achieved with 55% bandwidth covering from 11 to 19.5 GHz, where the insertion loss is lower than 0.28 dB. Some parameter sweeps are presented to investigate the effect of the rotor displacement during rotation. A prototype of the proposed rotary joint was fabricated using CNC milling for verification of the design. The measured results agree well with the simulated ones and prove the excellent performance of the proposed rotary joint.
Ali Farahbakhsh. Wideband Rotary Joint Based on Gap Waveguide Technology. IEEE Transactions on Microwave Theory and Techniques 2021, PP, 1 -1.
AMA StyleAli Farahbakhsh. Wideband Rotary Joint Based on Gap Waveguide Technology. IEEE Transactions on Microwave Theory and Techniques. 2021; PP (99):1-1.
Chicago/Turabian StyleAli Farahbakhsh. 2021. "Wideband Rotary Joint Based on Gap Waveguide Technology." IEEE Transactions on Microwave Theory and Techniques PP, no. 99: 1-1.
This paper presents a reconfigurable phase shifter based on gap waveguide technology. The phase shift is achieved by sliding the side wall of a groove gap waveguide (GGW). By changing the width of the GGW, its propagation constant is tuned, and consequently, the phase shift along the GGW will be controlled. The simulation and measurement results indicate about 34.5% impedance bandwidth while the maximum insertion loss is 0.6 dB and the maximum phase shift of 524° is obtained.
Hassan Abdollahy; Ali Farahbakhsh; Mohammad Hossein Ostovarzadeh. Mechanical reconfigurable phase shifter based on gap waveguide technology. AEU - International Journal of Electronics and Communications 2021, 132, 153655 .
AMA StyleHassan Abdollahy, Ali Farahbakhsh, Mohammad Hossein Ostovarzadeh. Mechanical reconfigurable phase shifter based on gap waveguide technology. AEU - International Journal of Electronics and Communications. 2021; 132 ():153655.
Chicago/Turabian StyleHassan Abdollahy; Ali Farahbakhsh; Mohammad Hossein Ostovarzadeh. 2021. "Mechanical reconfigurable phase shifter based on gap waveguide technology." AEU - International Journal of Electronics and Communications 132, no. : 153655.
A center-fed slot array antenna based on ridge gap waveguide (RGW) technology is presented. In the proposed structure, no aperture blockage is introduced which provides easy control on side lobe level (SLL) especially for low values of below −20 dB. Furthermore, thanks to the compact nature of TEM-based RGW line in E-plane, the proposed structure, unlike its TE-based groove gap waveguide (GGW) counterpart does not suffer from the grating lobe problem when applied in a two-dimensional array. For proof of concept a 4x10 slot array based on the proposed RGW-based topology is designed and fabricated for operation at 15 GHz. Both simulation and measurement results show proper radiation performance including the gain of 20 dB and the SLL of −23 dB as well as the fixed beam over the antenna operating bandwidth.
Saeid Ghorbani; Seyed Ali Razavi; Mohammad Hossein Ostovarzadeh; Ali Farahbakhsh. Development of a center fed slot array antenna with very low side lobes using ridge gap waveguide (RGW) technology. AEU - International Journal of Electronics and Communications 2020, 125, 153385 .
AMA StyleSaeid Ghorbani, Seyed Ali Razavi, Mohammad Hossein Ostovarzadeh, Ali Farahbakhsh. Development of a center fed slot array antenna with very low side lobes using ridge gap waveguide (RGW) technology. AEU - International Journal of Electronics and Communications. 2020; 125 ():153385.
Chicago/Turabian StyleSaeid Ghorbani; Seyed Ali Razavi; Mohammad Hossein Ostovarzadeh; Ali Farahbakhsh. 2020. "Development of a center fed slot array antenna with very low side lobes using ridge gap waveguide (RGW) technology." AEU - International Journal of Electronics and Communications 125, no. : 153385.
A coplanar Magic-T is proposed based on a combination of ridge and E-plane groove gap waveguides for Ka-band applications. All four ports of the proposed Magic-T are coplanar. The impedance bandwidth of the proposed Magic-T is about 43% covering the whole Ka-band from 26 to 40 GHz. The Magic-T isolation is better than 40 dB in the whole bandwidth while its insertion loss is about 0.25 dB.
Ali Farahbakhsh. Ka-Band Coplanar Magic-T Based on Gap Waveguide Technology. IEEE Microwave and Wireless Components Letters 2020, 30, 853 -856.
AMA StyleAli Farahbakhsh. Ka-Band Coplanar Magic-T Based on Gap Waveguide Technology. IEEE Microwave and Wireless Components Letters. 2020; 30 (9):853-856.
Chicago/Turabian StyleAli Farahbakhsh. 2020. "Ka-Band Coplanar Magic-T Based on Gap Waveguide Technology." IEEE Microwave and Wireless Components Letters 30, no. 9: 853-856.
Due to the development of mobile communication devices, the miniaturized antenna design is becoming an important consideration today. In this paper, a new small microstrip antenna is proposed in which the patch is curved along its width to force the electrical currents to move in a longer path. Consequently, the electrical size of patch is increased so that its physical size is decreased to almost 63.5% of the size of common rectangular patch antenna. Furthermore, the measurement results show that the return loss of the proposed antenna is enhanced compared to the rectangular patch antenna while their radiation patterns are the same.
Ali Farahbakhsh; Davoud Zarifi. Miniaturization of patch antennas by curved edges. AEU - International Journal of Electronics and Communications 2020, 117, 153125 .
AMA StyleAli Farahbakhsh, Davoud Zarifi. Miniaturization of patch antennas by curved edges. AEU - International Journal of Electronics and Communications. 2020; 117 ():153125.
Chicago/Turabian StyleAli Farahbakhsh; Davoud Zarifi. 2020. "Miniaturization of patch antennas by curved edges." AEU - International Journal of Electronics and Communications 117, no. : 153125.
A class of wideband directional couplers suitable for achieving different coupling levels are proposed in this work. The proposed couplers have been implemented using double-layer groove gap waveguide at millimeter-wave frequency range. They are composed of two parallel groove gap waveguide parts placed on top of each other in such a way that the coupling between the two waveguide sections can be achieved via the coupling structures placed in the common wall. Usually, the coupling layer consists of two rows of holes and depending on the number of holes the coupling levels can be controlled. The manifest and applicable property of the proposed directional coupler is that the coupling level can be simply changed using the different coupling layers without changing the top and bottom groove waveguides and transitions. As another significant advantage of the proposed coupler, there is no requirement of good electrical contact among different metallic parts of the structure which considerably simplifies the manufacturing processes and mechanical assembly at millimeter-waves applications. For verification purpose, three sample couplers with coupling levels of 10 dB, 20 dB and 30 dB have been designed, fabricated and measured. To make the device accessible and measurable using standard rectangular waveguides, two types of transitions from groove gap waveguide to standard WR-15 are designed. Simulation and experimental results are in good agreement and show that the proposed couplers have large bandwidth for return loss level of 20 dB, coupling level of 10±1, 20±1 and 30±1 dB, and isolation level of 30, 35 and 40 dB over the desired frequency band of 50 -70 GHz. The proposed directional couplers can be used as good candidates at millimeter-wave frequencies for probing and the design of compact integrated microwave circuits and systems such as antenna array feeding networks.
Davoud Zarifi; Ali Farahbakhsh; Ashraf Uz Zaman. Design and Fabrication of Wideband Millimeter-Wave Directional Couplers With Different Coupling Factors Based on Gap Waveguide Technology. IEEE Access 2019, 7, 88822 -88829.
AMA StyleDavoud Zarifi, Ali Farahbakhsh, Ashraf Uz Zaman. Design and Fabrication of Wideband Millimeter-Wave Directional Couplers With Different Coupling Factors Based on Gap Waveguide Technology. IEEE Access. 2019; 7 (99):88822-88829.
Chicago/Turabian StyleDavoud Zarifi; Ali Farahbakhsh; Ashraf Uz Zaman. 2019. "Design and Fabrication of Wideband Millimeter-Wave Directional Couplers With Different Coupling Factors Based on Gap Waveguide Technology." IEEE Access 7, no. 99: 88822-88829.
This paper proposed a wideband, efficient and high gain circularly polarized (CP) array antenna based on gap waveguide technology for 30 GHz frequency band applications. The antenna sub-array is a 2 ×2-slot groove gap waveguide (GGW)-based cavity-backed antenna. The antenna is fed by a ridge gap waveguide (RGW). Two corners of the radiating slots are truncated to obtain CP radiation and some corrugations are introduced to the radiating layer to suppress the surface waves between neighbor sub-arrays. The planar 16-way feeding network based on RGW is utilize to feed the sub-arrays. The feeding network is multi-level sequential phased with a quadrature phase shift. To validate the array antenna performance, a prototype of the antenna has been manufactured using standard milling technology. The measured reflection coefficient bandwidth is about 22 % covering from 28.3 to 35.3 GHz and a measured 3-dB axial ratio bandwidth of about 21.8 % is achieved from 27.8 to 34.6 GHz. The maximum measured gain is 23.5 dBi which is occurred at 30.75 GHz.
Mohammad Akbari; Ali Farahbakhsh; Abdel-Razik Sebak. Ridge Gap Waveguide Multilevel Sequential Feeding Network for High-Gain Circularly Polarized Array Antenna. IEEE Transactions on Antennas and Propagation 2018, 67, 251 -259.
AMA StyleMohammad Akbari, Ali Farahbakhsh, Abdel-Razik Sebak. Ridge Gap Waveguide Multilevel Sequential Feeding Network for High-Gain Circularly Polarized Array Antenna. IEEE Transactions on Antennas and Propagation. 2018; 67 (1):251-259.
Chicago/Turabian StyleMohammad Akbari; Ali Farahbakhsh; Abdel-Razik Sebak. 2018. "Ridge Gap Waveguide Multilevel Sequential Feeding Network for High-Gain Circularly Polarized Array Antenna." IEEE Transactions on Antennas and Propagation 67, no. 1: 251-259.
Inspec keywords: antenna feeds; antenna radiation patterns; slot antenna arrays; millimetre wave antenna arrays; directive antennas; broadband antennas; power dividers; waveguides Subjects: Antenna arrays; Antenna accessories
Ali Farahbakhsh; D. Zarifi; A.U. Zaman. A Wideband High-Gain and High-Efficiency Slot Array Antenna Based on Groove Gap Waveguide. 12th European Conference on Antennas and Propagation (EuCAP 2018) 2018, 1 .
AMA StyleAli Farahbakhsh, D. Zarifi, A.U. Zaman. A Wideband High-Gain and High-Efficiency Slot Array Antenna Based on Groove Gap Waveguide. 12th European Conference on Antennas and Propagation (EuCAP 2018). 2018; ():1.
Chicago/Turabian StyleAli Farahbakhsh; D. Zarifi; A.U. Zaman. 2018. "A Wideband High-Gain and High-Efficiency Slot Array Antenna Based on Groove Gap Waveguide." 12th European Conference on Antennas and Propagation (EuCAP 2018) , no. : 1.
D. Zarifi; Ali Farahbakhsh; A.U. Zaman. A V-band Branch Guide 3-dB Coupler Based on Gap Waveguide for Use in Antenna Array. 12th European Conference on Antennas and Propagation (EuCAP 2018) 2018, 1 .
AMA StyleD. Zarifi, Ali Farahbakhsh, A.U. Zaman. A V-band Branch Guide 3-dB Coupler Based on Gap Waveguide for Use in Antenna Array. 12th European Conference on Antennas and Propagation (EuCAP 2018). 2018; ():1.
Chicago/Turabian StyleD. Zarifi; Ali Farahbakhsh; A.U. Zaman. 2018. "A V-band Branch Guide 3-dB Coupler Based on Gap Waveguide for Use in Antenna Array." 12th European Conference on Antennas and Propagation (EuCAP 2018) , no. : 1.
A wideband 8 ×8-element slot antenna array based on ridge gap waveguide feeding network has been proposed for mmWave applications. The antenna sub-array consists of four radiating slots which are excited by a groove gap cavity layer. Compared with previously published works, the proposed planar antenna array has quite wide impedance bandwidth. The antenna covers a wide band of 50-67.8 GHz with 30% impedance bandwidth (VSWR < 2). Also, the antenna has only 2.5 dB gain variation over the entire bandwidth which implies also good radiation characteristics for the proposed antenna. The maximum measured gain value is about 27.5 dBi with a total efficiency of 80% for the proposed antenna within the band of interest. With this performance, the proposed antenna array is a promising candidate for millimeter-wave communication systems.
Ali Farahbakhsh; Davoud Zarifi; Ashraf Uz Zaman. A mmWave Wideband Slot Array Antenna Based on Ridge Gap Waveguide With 30% Bandwidth. IEEE Transactions on Antennas and Propagation 2017, 66, 1008 -1013.
AMA StyleAli Farahbakhsh, Davoud Zarifi, Ashraf Uz Zaman. A mmWave Wideband Slot Array Antenna Based on Ridge Gap Waveguide With 30% Bandwidth. IEEE Transactions on Antennas and Propagation. 2017; 66 (2):1008-1013.
Chicago/Turabian StyleAli Farahbakhsh; Davoud Zarifi; Ashraf Uz Zaman. 2017. "A mmWave Wideband Slot Array Antenna Based on Ridge Gap Waveguide With 30% Bandwidth." IEEE Transactions on Antennas and Propagation 66, no. 2: 1008-1013.
This communication presents a wideband aperture-coupled patch antenna array based on ridge gap waveguide feed layer for 60-GHz applications. The novelty of this antenna lies in the combination of relatively new gap waveguide technology along with conventional patch antenna arrays allowing to achieve a wideband patch antenna array with high gain and high radiation efficiency. An 8 × 8-element array antenna is designed, fabricated, and tested. Experimental results show that the bandwidth of VSWR . 2 is up to 15.5% (57.5-67.2 GHz). More than 75% efficiency and higher than 21.5-dBi gain are achieved over the operational bandwidth. The results are valuable for the design and evaluation of wideband planar antenna arrays at millimeter-wave frequencies.
Davoud Zarifi; Ali Farahbakhsh; Ashraf Uz Zaman. A Gap Waveguide-Fed Wideband Patch Antenna Array for 60-GHz Applications. IEEE Transactions on Antennas and Propagation 2017, 65, 4875 -4879.
AMA StyleDavoud Zarifi, Ali Farahbakhsh, Ashraf Uz Zaman. A Gap Waveguide-Fed Wideband Patch Antenna Array for 60-GHz Applications. IEEE Transactions on Antennas and Propagation. 2017; 65 (9):4875-4879.
Chicago/Turabian StyleDavoud Zarifi; Ali Farahbakhsh; Ashraf Uz Zaman. 2017. "A Gap Waveguide-Fed Wideband Patch Antenna Array for 60-GHz Applications." IEEE Transactions on Antennas and Propagation 65, no. 9: 4875-4879.
A 2×2 circularly polarized (CP) patch subarrays based on ridge gap waveguide (RGW) around 30GHz is designed. To broaden the CP bandwidth, the 2×2 patch subarray elements are fed by sequential feeding technique. The simulated results using CST show that the RGW feeding has a great performance in terms of impedance and radiation characteristics so that impedance and CP bandwidths are 30.5% and 21.5% respectively. In addition, a peak gain 13.5dB at 30GHz is achieved. Numerical results indicate that the proposed structure can cover the 3dB-gain bandwidth of 22.1%.
M. Akbari; Ali Farahbakhsh; M. Farahani; A. R. Sebak; T. A. Denidni. A sequential-phase feed antenna subarray based on ridge gap waveguide. 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting 2017, 2125 -2126.
AMA StyleM. Akbari, Ali Farahbakhsh, M. Farahani, A. R. Sebak, T. A. Denidni. A sequential-phase feed antenna subarray based on ridge gap waveguide. 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. 2017; ():2125-2126.
Chicago/Turabian StyleM. Akbari; Ali Farahbakhsh; M. Farahani; A. R. Sebak; T. A. Denidni. 2017. "A sequential-phase feed antenna subarray based on ridge gap waveguide." 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting , no. : 2125-2126.
Wideband design of power dividers, T-junctions, and transitions based on groove gap waveguide (GGW) technology is presented in this paper with the goal to use these components in high-gain millimeter-wave antenna array design at 60-GHz frequency range. Since this GGW technology does not require electrical contact between the different metal layers of a complex 3-D waveguide structure, the fabrication cost and mechanical complexity are decreased. The designed T-junctions and different power dividers exhibit wide operational bandwidth and low output power and phase imbalance over the 60-GHz frequency band. Also, two transitions from GGW to a standard rectangular waveguide have been designed. To validate the performance of the designed components, a 64-way power divider in combination with 256 radiating slots is designed, prototyped, and measured at 60-GHz band. Measurement results agree well with the simulated performance of the complete array antenna, and the antenna gain is more than 32.5 dBi. The total radiation efficiency is more than 80% over the operating frequency range from 57 to 67 GHz. Also, the measured sidelobe levels are found to be agreeing well with the simulated level.
Ali Farahbakhsh; Davoud Zarifi; Ashraf Uz Zaman. 60-GHz Groove Gap Waveguide Based Wideband $H$ -Plane Power Dividers and Transitions: For Use in High-Gain Slot Array Antenna. IEEE Transactions on Microwave Theory and Techniques 2017, 65, 4111 -4121.
AMA StyleAli Farahbakhsh, Davoud Zarifi, Ashraf Uz Zaman. 60-GHz Groove Gap Waveguide Based Wideband $H$ -Plane Power Dividers and Transitions: For Use in High-Gain Slot Array Antenna. IEEE Transactions on Microwave Theory and Techniques. 2017; 65 (11):4111-4121.
Chicago/Turabian StyleAli Farahbakhsh; Davoud Zarifi; Ashraf Uz Zaman. 2017. "60-GHz Groove Gap Waveguide Based Wideband $H$ -Plane Power Dividers and Transitions: For Use in High-Gain Slot Array Antenna." IEEE Transactions on Microwave Theory and Techniques 65, no. 11: 4111-4121.
Ali Farahbakhsh; D. Zarifi. Analysis and design of metallic parabolic anechoic chamber. 2017 11th European Conference on Antennas and Propagation (EUCAP) 2017, 3053 -3056.
AMA StyleAli Farahbakhsh, D. Zarifi. Analysis and design of metallic parabolic anechoic chamber. 2017 11th European Conference on Antennas and Propagation (EUCAP). 2017; ():3053-3056.
Chicago/Turabian StyleAli Farahbakhsh; D. Zarifi. 2017. "Analysis and design of metallic parabolic anechoic chamber." 2017 11th European Conference on Antennas and Propagation (EUCAP) , no. : 3053-3056.
Ali Farahbakhsh; D. Zarifi; A. U. Zaman. Ridge gap waveguide slot antenna array with 30% bandwidth for 60-GHz applications. 2017 11th European Conference on Antennas and Propagation (EUCAP) 2017, 3050 -3052.
AMA StyleAli Farahbakhsh, D. Zarifi, A. U. Zaman. Ridge gap waveguide slot antenna array with 30% bandwidth for 60-GHz applications. 2017 11th European Conference on Antennas and Propagation (EUCAP). 2017; ():3050-3052.
Chicago/Turabian StyleAli Farahbakhsh; D. Zarifi; A. U. Zaman. 2017. "Ridge gap waveguide slot antenna array with 30% bandwidth for 60-GHz applications." 2017 11th European Conference on Antennas and Propagation (EUCAP) , no. : 3050-3052.
D. Zarifi; Ali Farahbakhsh; A. U. Zaman. A Ridge Gap Waveguide fed apperture-coupled microstrip antenna array for 60 GHz applications. 2017 11th European Conference on Antennas and Propagation (EUCAP) 2017, 953 -955.
AMA StyleD. Zarifi, Ali Farahbakhsh, A. U. Zaman. A Ridge Gap Waveguide fed apperture-coupled microstrip antenna array for 60 GHz applications. 2017 11th European Conference on Antennas and Propagation (EUCAP). 2017; ():953-955.
Chicago/Turabian StyleD. Zarifi; Ali Farahbakhsh; A. U. Zaman. 2017. "A Ridge Gap Waveguide fed apperture-coupled microstrip antenna array for 60 GHz applications." 2017 11th European Conference on Antennas and Propagation (EUCAP) , no. : 953-955.
Anechoic chambers are used for indoor antenna measurements. The common method for anechoic chamber construction is to cover all inside walls by the EM absorbers. A fully metallic parabolic chamber is presented in which the propagation of the EM waves inside the chamber is controlled and they are guided to an absorber. In the proposed method, an appropriate quiet zone with plane wave illumination is obtained, and unlike ordinary anechoic chambers the absorber usage is decreased greatly. The performance of the chamber is evaluated by simulation and the results showed that the proposed method could provide a useful technique for the compact range antenna measurements.
A. Farahbakhsh; D. Zarifi. Design of metallic parabolic anechoic chamber for compact range measurement. Electronics Letters 2017, 53, 294 -296.
AMA StyleA. Farahbakhsh, D. Zarifi. Design of metallic parabolic anechoic chamber for compact range measurement. Electronics Letters. 2017; 53 (5):294-296.
Chicago/Turabian StyleA. Farahbakhsh; D. Zarifi. 2017. "Design of metallic parabolic anechoic chamber for compact range measurement." Electronics Letters 53, no. 5: 294-296.
Ali Farahbakhsh; Mohammad Khalaj-Amirhosseini. DESIGN OF NONUNIFORM METALLIC ANECHOIC CHAMBER FOR RADIATION PATTERN MEASUREMENT. Progress In Electromagnetics Research M 2017, 58, 65 -72.
AMA StyleAli Farahbakhsh, Mohammad Khalaj-Amirhosseini. DESIGN OF NONUNIFORM METALLIC ANECHOIC CHAMBER FOR RADIATION PATTERN MEASUREMENT. Progress In Electromagnetics Research M. 2017; 58 ():65-72.
Chicago/Turabian StyleAli Farahbakhsh; Mohammad Khalaj-Amirhosseini. 2017. "DESIGN OF NONUNIFORM METALLIC ANECHOIC CHAMBER FOR RADIATION PATTERN MEASUREMENT." Progress In Electromagnetics Research M 58, no. : 65-72.
Anechoic chambers are used for indoor antenna measurements. The common method of constructing an anechoic chamber is to cover all inside walls by the electromagnetic absorbers. In this paper, a fully metallic spherical chamber structure is presented in which the propagation of the electromagnetic waves inside the chamber is controlled and they are guided to an absorber. In the proposed method, an appropriate quiet zone is obtained, and unlike ordinary anechoic chambers, the absorber usage amount is reduced greatly. The performance of the chamber is evaluated by simulation. The results show that the proposed method could provide a useful technique for the indoor antenna measurements.
Ali Farahbakhsh; Mohammad Khalaj-Amirhosseini. Metallic spherical anechoic chamber for antenna pattern measurement. Chinese Physics B 2016, 25, 088401 .
AMA StyleAli Farahbakhsh, Mohammad Khalaj-Amirhosseini. Metallic spherical anechoic chamber for antenna pattern measurement. Chinese Physics B. 2016; 25 (8):088401.
Chicago/Turabian StyleAli Farahbakhsh; Mohammad Khalaj-Amirhosseini. 2016. "Metallic spherical anechoic chamber for antenna pattern measurement." Chinese Physics B 25, no. 8: 088401.