A Novel Feeding Network for Quadri-Polarization Antennas With Simultaneously Wide Impedance and Polarization Bandwidth

In this communication, a broadband feeding network for quadri-polarization antennas has been proposed. The feeding network is composed of several passive components, namely two Wilkinson power dividers, slow-wave transmission lines, Schiffman phase shifters, branch-line hybrids, and a crossover. Wit...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2018-04, Vol.66 (4), p.2107-2112
Main Authors: Deng, Hui, Huang, Fa, Wang, Bing-Zhong, Xiong, Jiang
Format: Article
Language:English
Subjects:
Antenna feeds
Antenna measurements
Bandwidth
Broadband antennas
Feeding network
multipolarization antennas
patch antennas
Polarization
polarization diversity
Ports (Computers)
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Summary:In this communication, a broadband feeding network for quadri-polarization antennas has been proposed. The feeding network is composed of several passive components, namely two Wilkinson power dividers, slow-wave transmission lines, Schiffman phase shifters, branch-line hybrids, and a crossover. With a careful design of each component and an elaborate topology arrangement, the four output ports can transmit signals for antennas with four polarization states in a wideband, i.e., left-hand circular polarization, right-hand circular polarization, +45° and −45° linear polarization. Two antenna implementations based on such a feeding network have been given, and the measured results show that antennas have a bandwidth as wide as 22.7%, within which excellent input port impedance matching, port isolation, realized gain, and polarization purity are simultaneously achieved. The feeding network also has advantages such as completely switch-free, ease of fabrication and implementation, and flexibility for different types of antenna configurations.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2018.2804672