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US 8,941,549 B2Granted
Compact four-way transducer for dual polarization communications systems
AssigneeTongyu Communication Inc.
InventorsJunwei Dong, Zhonglin Wu, Guohui Xiong
Life of this patent
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Abstract
A compact four-way transducer (FWT) is provided for a microwave communications system. The compact FWT is a compact assembly that is configured to process microwave signals in dual-polarization antenna feeds and to provide single polarized signals for four communications channels. The compact FWT includes four terminals facing different directions at one end for receiving/sending single polarized signals, and a terminal at an opposite end for receiving/sending dual polarized signals.
Claims21
A compact assembly for a microwave communications system, comprising:
- a first input/output end including four terminals each configured to send/receive single polarized electromagnetic signals;
- a second input/output end including a terminal configured to send/receive an electromagnetic signal having dual polarized modes, the compact assembly extending from the first input/output end to the second input/output end along a longitudinal direction;
- a first directional coupler having two adjacent ports at one end, first and second of the terminals of the first input/output end being connected to the adjacent ports of the first directional coupler via respective transmission lines;
- a second directional coupler having two adjacent ports at one end, third and fourth of the terminals of the first input/output end being connected to the adjacent ports of the second directional coupler via respective transmission lines;
- an orthomode transducer (OMT), the OMT including first and second ports each configured to send/receive an electromagnetic signal having a single polarization mode to/from the first or second directional coupler, and a third port configured to send/receive the electromagnetic signal having dual polarized modes to/from the terminal of the second input/output end;
- a polarization switcher connecting one of the first and second directional couplers to one of the first and second ports of the OMT, the polarization switcher configured to switch a polarization of one of the electromagnetic signals having a single polarization mode that is transmitted therethrough;
- and
- a through transmission line connecting the other of the first and second directional couplers to the other of the first and second ports of the OMT, the through transmission line configured to transmit energy without switching a polarization of the other of the electromagnetic signals having a single polarization mode that is transmitted therethrough.
5 more elements
Dependencies are inferred from the claim text.