Integrated Dual-Band Filtering/Duplexing Antennas
Integrated Dual-Band Filtering/Duplexing Antennas
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DOI：
10.1109/access.2018.2805224
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发表时间：
2018-02
期刊：
影响因子：
3.9
通讯作者：
C. Mao;S. Gao;Yi Wang;Y. Liu;Xue-xia Yang;Zhi-qun Cheng;Y. Geng
中科院分区：
文献类型：
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作者：
C. Mao;S. Gao;Yi Wang;Y. Liu;Xue-xia Yang;Zhi-qun Cheng;Y. Geng
本文首先回顾了双频工作的集成滤波天线的研究现状。在此基础上，提出了两种低频比双频微带滤波天线的设计方案。第一个设计是一个双频双极化（DBDP）天线的频率比为1.2的单一贴片，通过采用耦合谐振器技术。通过在接地平面中的槽将发夹谐振器与贴片垂直耦合，然后耦合到双模短截线加载谐振器，来实现每个极化处的两个频带。每个频段都具有2阶滤波性能，带宽和带外抑制性能都有所改善。这种集成技术可以显著降低传统DBDP天线/阵列的尺寸和复杂度。在第二个设计中，我们提出了一个新颖的双端口双频天线（频率比为1.38），具有集成的滤波和混频功能。通过插入地面的U形槽谐振器将单个贴片与两组基于谐振器的滤波通道耦合来实现频率补偿功能。该器件在一个非常紧凑的结构中无缝集成了滤波器、滤波器和天线的功能。
In this paper, the state-of-the-art integrated filtering antennas with dual-band operation are first reviewed. Then, two designs of dual-band microstrip filtering antennas with a low-frequency ratio are presented. The 1st design is a dual-band dual-polarization (DBDP) antenna with a frequency ratio of 1.2 on a single patch, by employing the coupled resonator technique. Two bands at each polarization are achieved by vertically coupling a hairpin resonator with a patch through a slot in the ground plane and then coupled to a dual-mode stub loaded resonator. Each band exhibits a 2nd-order filtering performance with improved bandwidth and out-of-band rejection. Such an integration technique could significantly reduce the dimension and the complexity of the traditional DBDP antennas/arrays. In the 2nd design, a novel dual-port dual-band antenna (with a frequency ratio of 1.38) with the integrated filtering and duplexing functions is proposed. The frequency duplexing function is implemented by coupling a single patch with two sets of resonator-based filtering channels via a U-slot resonator inserted in the ground. This device seamlessly integrates the functions of duplexers, filters, and antennas in a very compact structure.