Design of Series-Fed Bandwidth-Enhanced Microstrip Antenna Array for Millimetre-Wave Beamforming Applications

被引：7
作者：
Chen, Hung-Chen [1 ]
Chiu, Tsenchieh [1 ]
Hsu, Ching-Luh [2 ]
机构：
[1] Natl Cent Univ, Taoyuan, Taiwan
[2] Natl Chung Shan Inst Sci & Technol, Taoyuan, Taiwan
来源：
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION | 2019年 / 2019卷
关键词：
Antenna bandwidth - Bandwidth enhanced - Current distribution - Input impedance - Linear polarization - Microstrip patch arrays - Millimetre waves - Return loss bandwidth;
D O I：
10.1155/2019/3857964
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel series-fed microstrip patch array antenna for 37/39 GHz beamforming is proposed. To improve the antenna bandwidth, two of the patches are modified with truncated corners in the diagonal direction. This truncation generates two degenerate resonances which result in a flattened frequency response of the input impedance. Then, the recessed microstrip feeds for the other two patches are designed to yield a proper current distribution for radiation while maintaining minimal return loss, wide bandwidth, and low sidelobes. Though the individual patch antenna is elliptically polarized due to the truncated corners, a phased array with linear polarization can still be obtained by alternately deploying left-handed and right-handed elliptically polarized patches. For validation of the proposed design, an array is fabricated with 16 elements on a substrate with 10 mil thickness and epsilon r =2.2. The beamforming capability of the proposed array is also demonstrated. The experiment results agree well with the simulation and show that the antenna gain and the return loss bandwidth can be more than 21 dBi and 8%, respectively.
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页数：10
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