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- Title
Wideband, Dual-Polarized Patch Antenna Array Fed by Novel, Differentially Fed Structure.
- Authors
Ou, Naiming; Wu, Xian; Xu, Kaijiang; Sun, Fukun; Yu, Tongfei; Luan, Yuchen
- Abstract
In this article, a 1 × 4 wideband, dual-polarized patch antenna array fed by a novel, differentially fed structure is proposed. The differentially fed structure of the antenna was realized by a parallel line structure that was printed on a PCB and connected with the inner and outer conductors of a coaxial cable. This method elaborately solved the problem of the narrow bandwidth of conventional microstrip differential feeding. By using a relatively thick air substrate (thickness = 0.19 λ0), stacked patches, a coupling feeding structure, and a differential feeding structure with the novel design, the element of the patch antenna array introduced below operated from 0.415 GHz to 0.707 GHz (achieving the 52.0% bandwidth) with a VSWR < 2.0, yielding a high port isolation less than −28 dB. For the array, an active VSWR less than 2.0 was also obtained with a port isolation of less than −25 dB, ranging from 0.405 GHz to 0.696 GHz. In the desired bandwidth, the array had an azimuth 3 dB beamwidth of about 19° for both horizontal polarization and vertical polarization. The antenna array also had good performance in scanning (stable gain and 3 dB beamwidth) and circular polarization (a 3 dB axial ratio bandwidth better than 54.5%).
- Subjects
ANTENNA arrays; ANTENNA feeds; CIRCULAR polarization; ANTENNAS (Electronics); COAXIAL cables; ANIMAL feeds
- Publication
Electronics (2079-9292), 2024, Vol 13, Issue 7, p1382
- ISSN
2079-9292
- Publication type
Article
- DOI
10.3390/electronics13071382