Kanglong Zhang

Prof. Kanglong Zhang

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Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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30 September 2022 in IEEE Transactions on Antennas and Propagation
Verified
Journal Article
Closed access
KLKuo Liu
Kuo Liu
ZLZiwei Li
Ziwei Li
WCWenjie Cui
Wenjie Cui
KZKanglong Zhang
Kanglong Zhang
MWMengjun Wang
Mengjun Wang
ELErping Li
Erping Li
To meet an implantable device for human disease detection, a conformal multiple-input multiple-output (MIMO) antenna is investigated in this paper. The layout and decoupling of the antenna are designed according to the inherent electromagnetic properties of the implanted device based on the theory of characteristic modes (TCM). Compared with traditional methods, the TCM provides a method and theory to design a conformal implantable antenna with MIMO property. The designed antenna has the advantage of simple structure, low space occupation, and little multipath reflection. The new designed structure adopts two planar helical radiators to achieve size miniaturization. Some I-type patches located between two radiators and slotting structure on the ground plane to reduce coupling. The biocompatible flexible polyimide is used as a dielectric substrate, enabling the conformal property and compatibility with the human tissue. Measurements of the fabricated prototype have been finished in the minced pork and skin-mimicking gel. Results show in very good agreement with the simulations, which validate the suitability of the proposed antenna for the implantable devices. To our best knowledge, this is the first time that the TCM has been applied to guiding the design of implantable MIMO antennas.
23 August 2021 in IEEE Access
Verified
Journal Article
Open access
KLKuo Liu
Kuo Liu
RLRuipeng Liu
Ruipeng Liu
WCWenjie Cui
Wenjie Cui
KZKanglong Zhang
Kanglong Zhang
MWMengjun Wang
Mengjun Wang
ELErping Li
Erping Li
This paper presents a conformal spiral antenna that is miniaturized and with dual-resonant for the wireless implantable capsule system. The spiral antenna conforms to a swallowable capsule with a radius of 3 mm and a length of 26 mm without occupying the internal space of the capsule. The compact antenna adopts two spiral arms to extend the effective current path for miniaturization. Biocompatible flexible polyimide was used as the dielectric substrate and capsule shell, achieving conformal properties of the antenna as well as compatibility with human tissue. The antenna has been simulated in different environmental models. The bandwidth of the antenna can reach 39.16 % (1.82 GHz-2.76 GHz) and 12.06 % (5.36 GHz-6.06 GHz) at 2.4 GHz and 5.8 GHz. The maximum gains of −35.2 dBi and −28.1 dBi can be achieved at 2.4 GHz and 5.8 GHz, respectively. In addition, the transmission characteristics of the antenna were experimentally verified in the minced pork and pig intestine. By analyzing the communication link, the communication distance between transceivers at 2.4 GHz and 5.8 GHz can meet 14 m and 5 m. These results show that the proposed antenna is suitable for wireless implantable capsule systems.
1 March 2021 in IEEE Transactions on Antennas and Propagation
Verified
Journal Article
Closed access
KZKanglong Zhang
Kanglong Zhang
LWLu Wang
Lu Wang
RLRuipeng Liu
Ruipeng Liu
MWMengjun Wang
Mengjun Wang
CFChao Fan
Chao Fan
ELErping Li
Erping Li
An optimized three-dimensional one-step leapfrog finite-difference time-domain (FDTD) method has been investigated, which is with a weakly conditional stability (WCS) to reduce numerical dispersion further. By introducing the artificial anisotropy parameters in a cross-correspondence manner, the phase velocity error is effectively limited without additional computational time and memory cost. An auxiliary field variable is adopted to simplify the iterative formulae with few additional processes, and the same stability has been validated between methods of conventional leapfrog WCS-FDTD and ourselves. Moreover, much lower numerical dispersion is shown to withstand larger Courant-Friedrich-Levy number under the same error condition. To verify our method efficiently, a newly designed hollow dielectric resonator antenna (DRA), instead of a solid one, is conducted effective calculation. Furthermore, two forms of four-element arrays have been developed with the DRA element above, and a T-shaped power divider is designed as a fed network and subjected to calculations and experimental analyses. Reflection coefficients and radiation patterns are shown the effectiveness of both DRA and arrays. The most noteworthy aspect is that our low-dispersion WCS-FDTD scheme can be effectively simulated the hollow DRA and arrays, and with excellent performance in terms of memory occupation, calculation accuracy, and efficiency.
21 September 2021 in IEEE Transactions on Antennas and Propagation
Verified
Journal Article
Closed access
ZLZiwei Li
Ziwei Li
WCWenjie Cui
Wenjie Cui
RLRuipeng Liu
Ruipeng Liu
KZKanglong Zhang
Kanglong Zhang
WLWeibo Liang
Weibo Liang
ELErping Li
Erping Li
In this article, a compact magnetic dipole (MD) composite right-/left-handed transmission line (CRLH-TL) leaky-wave antenna (LWA) is proposed, which is periodically loaded with rectangular gaps and short stubs. Then, in light of the dielectric resonator with a high dielectric constant, low loss tangent, and good radiation performance, we further add an alumina ceramic block (ACB) to stack on the gap in each CRLH-TL LWA unit cell for forming the MD, and thus, wide beam-scanning range and compactness are achieved. To validate this design, a traditional uniform CRLH-TL LWA is investigated in detail. The results of S-parameters, electrical field distribution, and radiation properties illuminate the effects of introducing the ACB, such as impendence matching improvement and high radiation efficiency. Furthermore, to verify the flexible control of the balanced condition and the attenuation constant by changing the microstrip gap width and the ACB thickness predicted in the circuit model analysis, a nonuniform CRLH-TL LWA with quasi-constant amplitude is fabricated. Experimental results demonstrate a higher antenna gain and the stability of wide beam-scanning range under the condition of a compact design.
5 May 2023 in IEEE Transactions on Microwave Theory and Techniques
Verified
Journal Article
Closed access
KZKanglong Zhang
Kanglong Zhang
PZPeng Zhao
Peng Zhao
程一峰 Cheng程一峰 Cheng
程一峰 Cheng
SCShichang Chen
Shichang Chen
NXNing Xu
Ning Xu
ZHZheng Hong-Xing
Zheng Hong-Xing
In order to improve the numerical dispersion property of the finite-difference time-domain (FDTD) method further, two optimized low-dispersion schemes are herein proposed, which are based on the complying-divergence implicit (CDI) FDTD method and its one-step leapfrog method. These proposed approaches effectively reduce the numerical dispersion errors by intervening with anisotropic parameters while maintaining unconditional stability. The numerical stability and dispersion properties are analyzed in detail to illustrate their effectiveness. The factors, which impact the numerical dispersion including propagation angles, Courant–Friedrichs–Lewy (CFL) number, nonuniform multiscale, mesh resolution, and frequency are carefully examined. In addition, by using the dual-/triple-band multiple-input multiple-output (MIMO) antennas as numerical examples, the practicality of the optimization schemes is comprehensively validated by comparing the calculation time, memory resource, and relative error with those from the traditional and leapfrog CDI-FDTD methods. It is worth celebrating the superiority of the proposed schemes not only in terms of numerical dispersion, but also in calculation efficiency, solution accuracy, and floating-point operands.
22 November 2021 in IEEE Microwave and Wireless Components Letters
Verified
Journal Article
Closed access
KZKanglong Zhang
Kanglong Zhang
YWYue Wu
Yue Wu
WLWeibo Liang
Weibo Liang
MWMengjun Wang
Mengjun Wang
CFChao Fan
Chao Fan
ELErping Li
Erping Li
An improved locally 1-D (LOD) finite-difference time-domain (FDTD) method with a one-step leapfrog scheme has been developed, and its numerical dispersion has been further optimized due to the introduction of controlling parameters. On the premise of unconditional stability, we further simplified the implementation through auxiliary field variables. Moreover, the internal relationship between numerical dispersion and important parameters, such as propagation angle, the Courant-Friedrich-Levy number, and frequency, was analyzed in detail. Numerical examples verified the performance of the proposed method in terms of memory, efficiency, and accuracy.