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- Title
Dual-Band Dual Circular Polarization Filter Antenna Based on Transmission Line Feed.
- Authors
Wei Luo; Wuquan Chen; Yi Ren
- Abstract
The uplink and downlink of modern satellite communication systems operate on different frequency bands. A novel dual-band dual circular polarization filter antenna with a single port is proposed in this paper. The dual-band characteristic of the antenna is obtained by exciting stacked patches. The antenna supports right-handed circular polarization (RHCP) at lower frequency band and left-handed circular polarization (LHCP) at higher frequency band, respectively. The feeding network is realized with a strip line, and the antenna can be equivalent to a parallel circuit. If the lower frequency patch works, the higher frequency patch presents high impedance, and vice versa. Therefore, the antenna has excellent filtering performance. The measurements of antenna prototype are in good agreement with the simulation results. The impedance bandwidth is 5.80{6.10 GHz and 9.20{10.64 GHz, and the axial ratio (AR) bandwidth is 40MHz for lower band and 180MHz for higher band, respectively. Meanwhile, the radiation pattern is stable in the operation frequency bands.
- Subjects
CIRCULAR polarization; OPTICAL polarizers; ELECTRIC lines; MULTIFREQUENCY antennas; ANTENNAS (Electronics)
- Publication
Progress in Electromagnetics Research Letters, 2022, Vol 103, p127
- ISSN
1937-6480
- Publication type
Article
- DOI
10.2528/pierl22011402