期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 66, 期 11, 页码 6388-6392出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2018.2863243
关键词
45 GHz; circular polarization (CP); microstrip antenna; microstrip feeding network (MFN); millimeter-wave antenna
资金
- National Natural Science Foundation of China [61471172]
- 2016 Guangdong Public Welfare Research and Capacity Building Project [2016A010101010]
- Guangzhou Science Technology Project [201707010360, 201707010060]
A wideband circularly polarized (CP) 4 x 4 millimeter-wave antenna array composed of novel microstrip antenna elements is presented for IEEE 802.11 aj (45 GHz) application. Through introducing the L-shaped branches and truncated corners to the microstrip antenna element, an impedance bandwidth of 24.9% and a 3 dB axial ratio (AR) bandwidth of 17.3% are achieved. To clarify the effects of the L-shaped branches and truncated corners, the phase difference and amplitude ratios of the 180 degrees and 90 degrees electric field components at the point of (0,0, r) are extracted and analyzed. A simple and compact microstrip feeding network is designed to excite the CP antenna array, and two-layer PCB boards are used to implement the proposed array. The electromagnetic energy is coupled to the radiators from the feeding network through the aperture etched on the middle ground. The measured 3 dB AR bandwidth of the antenna array is 16% from 41.9 to 49.1 GHz, and the measured gain is all greater than 17 dBic within the band from 41 to 49 GHz.
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