High-Gain Electrically Large Air-Cavity-Backed Patch Antenna Element and Array | Zendy

Wenfang Peng | Zendy; Wenquan Cao | Zendy; Zuping Qian | Zendy

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High-Gain Electrically Large Air-Cavity-Backed Patch Antenna Element and Array

Author(s) -

Wenfang Peng,

Wenquan Cao,

Zuping Qian

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2884029

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

In this paper, single high-gain patch antenna element with electrical large property (ELP) based on TM₃₀ mode is presented. Stable field distribution of the TM₃₀-mode is maintained by using one TE₂₀-mode substrate integrated waveguide (SIW) slot-coupling feed structure. Furthermore, air-cavitybacked structure and metal pins are introduced to expand the antenna bandwidth. The ELP element resonates at 22 GHz with simulated -10-dB impedance bandwidth of 6.9% and maximum gain of 14.2 dBi. Then, in order to correct the asymmetrical field distribution in TE₂₀-mode SIW, differential feed technology is introduced in the array design. The feeding network consists of two TE₁₀-TE₂₀ mode planar transducers and one anti-phase power divider. The working principle and design procedure of the ELP array are given in detail accordingly. Finally, a 2 × 2 ELP array is optimized and fabricated for verification. The measured results show that the array antenna has -10-dB impedance bandwidth of 9% and maximum gain of 18.9 dBi. Furthermore, it owns merit of excellent radiation performance with high aperture efficiency of about 90%.

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