A simple decoupling method applied in gain improvement of a planar array antenna

A 4 × 4 patch array antenna based on loading shorting vias is proposed in this letter. The excitation method of the array antenna adopts stripline coupling feed, leading to a strong mutual coupling between the adjacent elements. The realized gain and impedance match are deteriorated seriously. Then, eight groups of metallic vias are introduced to the array antenna. By adjusting their number and spacing, the radiation performance of the array antenna can be improved significantly. Finally, the experiment results show that the proposed array antenna resonates at 5.4 GHz. Compared with the antenna without shorting vias, one resonance point caused by the mutual coupling can be removed within 5.34 GHz to 5.46 GHz. The gain drops unexpectedly, which is improved as well.

[1]  Imaculate Rosaline,et al.  Four Element MIMO Antenna Systems with Decoupling Lines for High-Speed 5G Wireless Data Communication , 2022, International Journal of Antennas and Propagation.

[2]  Zhijun Zhang,et al.  Decoupling Between Extremely Closely Spaced Patch Antennas by Mode Cancellation Method , 2021, IEEE Transactions on Antennas and Propagation.

[3]  Muhammad Yasir Jamal,et al.  Isolation Enhancement for MIMO Patch Antennas Sharing a Common Thick Substrate: Using a Dielectric Block to Control Space-Wave Coupling to Cancel Surface-Wave Coupling , 2021, IEEE Transactions on Antennas and Propagation.

[4]  Yingsong Li,et al.  Ceramic Superstrate-Based Decoupling Method for Two Closely Packed Antennas With Cross-Polarization Suppression , 2021, IEEE Transactions on Antennas and Propagation.

[5]  W. Hong,et al.  SIW Cavity-Fed Filtennas for 5G Millimeter-Wave Applications , 2021, IEEE Transactions on Antennas and Propagation.

[6]  Hanyang Wang,et al.  Antenna Decoupling by Common and Differential Modes Cancellation , 2021, IEEE Transactions on Antennas and Propagation.

[7]  Y. Liu,et al.  Dual-Band Dual-Circularly Polarized Antenna Array With Printed Ridge Gap Waveguide , 2021, IEEE Transactions on Antennas and Propagation.

[8]  Arvind Kumar,et al.  A coplanar‐waveguide‐fed planar integrated cavity backed slotted antenna array using TE33 mode , 2020, International Journal of RF and Microwave Computer-Aided Engineering.

[9]  Peng Chen,et al.  A Novel Slot-Array Defected Ground Structure for Decoupling Microstrip Antenna Array , 2020, IEEE Transactions on Antennas and Propagation.

[10]  Shuai Zhang,et al.  A Wavetrap-Based Decoupling Technique for 45° Polarized MIMO Antenna Arrays , 2020, IEEE Transactions on Antennas and Propagation.

[11]  Quangang Chen,et al.  Weak-Field-Based Self-Decoupling Patch Antennas , 2020, IEEE Transactions on Antennas and Propagation.

[12]  Xiaoxing Yin,et al.  Compact Postwall Slotline-Based Stepped Impedance Resonator Decoupling Structure for Isolation Enhancement of Patch Antenna Array , 2019, IEEE Antennas and Wireless Propagation Letters.

[13]  Y. Jay Guo,et al.  A Low Correlation and Mutual Coupling MIMO Antenna , 2019, IEEE Access.

[14]  Haoze Luan,et al.  Mutual Coupling Reduction of Closely E/H-Plane Coupled Antennas Through Metasurfaces , 2019, IEEE Antennas and Wireless Propagation Letters.

[15]  Donglin Su,et al.  Out-of-Band Mutual Coupling Suppression for Microstrip Antennas Using Characteristic Mode Analysis and Shorting Pins , 2019, IEEE Access.

[16]  Yaqiu Jin,et al.  Isolation Enhancement of Wideband Vehicular Antenna Array Using Fractal Decoupling Structure , 2019, IEEE Antennas and Wireless Propagation Letters.

[17]  Shuai Zhang,et al.  A Transmission-Line-Based Decoupling Method for MIMO Antenna Arrays , 2019, IEEE Transactions on Antennas and Propagation.

[18]  S. Raghavan,et al.  Wideband HMSIW‐based slotted antenna for wireless fidelity application , 2019, IET Microwaves, Antennas & Propagation.

[19]  Shao Yong Zheng,et al.  A Simple Decoupling Method for 5G Millimeter-Wave MIMO Dielectric Resonator Antennas , 2019, IEEE Transactions on Antennas and Propagation.

[20]  S. Raghavan,et al.  Bandwidth Enhancement of Substrate Integrated Waveguide Cavity-backed Bow-tie-complementary-ring-slot Antenna using a Shorted-via , 2018 .

[21]  K. S. Vishvaksenan,et al.  Isolation Enhancement in Dual-Band Microstrip Antenna Array Using Asymmetric Loop Resonator , 2018, IEEE Antennas and Wireless Propagation Letters.

[22]  K. S. Vishvaksenan,et al.  Mutual Coupling Reduction in Microstrip Patch Antenna Arrays Using Parallel Coupled-Line Resonators , 2017, IEEE Antennas and Wireless Propagation Letters.

[23]  Nam Kim,et al.  Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins , 2021, IEEE Access.