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2019-09-14
A Ku-Band Filtering Duplex Antenna for Satellite Communications
By
Progress In Electromagnetics Research M, Vol. 85, 1-10, 2019
Abstract
In this paper, a dual-polarisation shared-aperture duplex antenna is presented for satellite communications at the standard microwave Ku-band, based on the integrated filtering-antenna concept and co-design approach. The design relies on the use of resonators coupled to the radiating dual-band dual-polarisation antenna. The resonant patch antenna forms one pole of each channel filter, resulting in a third-order filter in the Rx channel and a second-order filter in the Tx channel. The Rx and Tx ports of the antenna take in horizontal and vertical linear polarisations, respectively. The integrated duplexer helps to increase the isolation between the ports and the selectivity of each channel. The integration between the filter and the antenna is achieved by electromagnetic coupling, without the need of external matching circuits. Thus it attains a compact footprint. The operation frequencies of the demonstrated duplexantenna are from 11 to 12.5 GHz (12.8%) for the downlink to the Rx port, and from 13 to 14.4 GHz (10.2%) for the uplink at the Tx port. High port-to-port isolation of over 40 dB is realized to reduce channel interference. Flat in-band average gains are achieved to be 8.3 and 8.6 dBi, for the low- and high-bands, respectively.
Citation
Mostafa Gamal Aly Chunxu Mao Steven Gao Yi Wang , "A Ku-Band Filtering Duplex Antenna for Satellite Communications," Progress In Electromagnetics Research M, Vol. 85, 1-10, 2019.
doi:10.2528/PIERM19071506
http://www.jpier.org/PIERM/pier.php?paper=19071506
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