A KU-BAND FILTERING DUPLEX ANTENNA FOR SATELLITE COMMUNICATIONS
A KU-BAND FILTERING DUPLEX ANTENNA FOR SATELLITE COMMUNICATIONS
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DOI：
10.2528/pierm19071506
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发表时间：
2019-09
影响因子：
1
通讯作者：
Mostafa G. Aly;C. Mao;S. Gao;Yi Wang
中科院分区：
文献类型：
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作者：
Mostafa G. Aly;C. Mao;S. Gao;Yi Wang
本文基于集成滤波天线的概念和协同设计方法，提出了一种适用于标准微波Ku波段卫星通信的双极化共口径双工天线。该设计依赖于耦合到辐射双频双极化天线的谐振器的使用。谐振贴片天线形成每个通道滤波器的一个极点，导致在Rx通道中形成三阶滤波器，在Tx通道中形成二阶滤波器。天线的Rx和Tx端口分别接受水平和垂直的线性极化。集成双工器有助于提高端口之间的隔离度和每个通道的选择性。滤波器和天线之间的集成是通过电磁耦合实现的，不需要外部匹配电路。因此，它获得了紧凑的足迹。对于Rx端口的下行链路，双工天线的工作频率为11-12.5 GHz(12.8%)；对于Tx端口的上行链路，双工天线的工作频率为13-14.4 GHz(10.2%)。实现了40分贝以上的高端到端隔离，以减少通道干扰。对于低频段和高频段，平坦的带内平均增益分别达到7.8 dBI和8.3 dBI。
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 duplex antenna 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 7.8 and 8.3 dBi, for the lowand high-bands, respectively.