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1. (WO2017031952) METHOD AND DEVICE FOR DESIGNING CIRCULATOR MATCHING CIRCUIT

Pub. No.:    WO/2017/031952    International Application No.:    PCT/CN2016/072834
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Jan 30 00:59:59 CET 2016
IPC: H03H 7/40
Applicants: ZTE CORPORATION
中兴通讯股份有限公司
Inventors: WANG, Xiangping
王相平
Title: METHOD AND DEVICE FOR DESIGNING CIRCULATOR MATCHING CIRCUIT
Abstract:
A method and device for designing a circulator matching circuit. The design method comprises: acquiring a preset isolation A that needs to be reached by a circulator (S101); selecting multiple frequency channel numbers in a frequency range used by the circulator, and drawing equal-isolation circles on a Smith chart when the each selected frequency channel number reaches the preset isolation A (S103); selecting one point in an intersected part of the drawn multiple equal-isolation circles, and using the point as a matching point satisfying the preset isolation A, and reading a matching coefficient Γ corresponding to the matching point on the Smith Chart (S105); and calculating an impedance value loaded on a matching end on the circulator according to the matching coefficient Γ, and designing a matching circuit matching a port according to the impedance value (S107). In the method for designing a circulator matching circuit, parameters of a circulator do not need to be changed; by acquiring a matching point satisfying isolation requirements, isolations of all selected frequency channel numbers in a passband can reach isolation requirements.