宽频带四端口馈源网络系统设计

doi:10.11999/JEIT160918

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Abstract

With the development of satellite communication technology, the demand for communication capacity is increasing. Broadening existing communication bandwidth is a key technology of satellite communication antenna. In order to extend the C band satellite communication, covering the receiving band 3.625~4.800 GHz and the transmitting band 5.850~7.025 GHz, a compact broadband four-port dual linear polarization feed network is designed. The broadband characteristics are achieved by employing a broadband orthomode transducer and two identical E-plane side coupling T-junction duplexers. The extended C band exceeds the bandwidth of a standard rectangular waveguide, so an octave bandwidth concept for compact waveguide transitions based on the use of octagonal-shaped sections is presented. A prototype of the feed network is developed. Simulated and measured results show good agreements. Measurements show that, this compact 4-port network provides Voltage Standing Wave Ratio (VSWR) better than 1.35 in all ports, insertion losses less than 0.5 dB, isolation Tx/Rx greater than 95 dB.

Key words： Satellite communication Feed network Orthomode transducer Diplexer Dual linear polarization

Received: 12 September 2016 Published: 06 April 2017

PACS:	TN927
	TN823

Fund:

The National Basic Research Program of China (2013CB837902), The National Natural Science Foundation of China (11261140641)

Corresponding Authors: WANG Jin E-mail: 15831969575@139.com

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	WANG Jin
	DU Biao
	JIAO Yongchang
	XIE Lei

Cite this article:

WANG Jin,DU Biao,JIAO Yongchang等. Design of Broadband 4-port Feed Network System[J]. JEIT, 2017, 39(6): 1313-1318.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT160918 OR http://jeit.ie.ac.cn/EN/Y2017/V39/I6/1313

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