US 12,206,148 B2
Filter device and equivalent filter circuit thereof
Tzong-Lin Wu, Taipei (TW); Hsu-Wei Liu, Taipei (TW); Chi-Hsuan Cheng, Taipei (TW); and Po-Jui Li, Taipei (TW)
Assigned to National Taiwan University, Taipei (TW)
Filed by NATIONAL TAIWAN UNIVERSITY, Taipei (TW)
Filed on Dec. 10, 2021, as Appl. No. 17/643,656.
Claims priority of application No. 110100676 (TW), filed on Jan. 7, 2021.
Prior Publication US 2022/0216578 A1, Jul. 7, 2022
Int. Cl. H01P 1/203 (2006.01); H01P 1/20 (2006.01); H01P 3/08 (2006.01)
CPC H01P 1/203 (2013.01) [H01P 1/20 (2013.01); H01P 1/20345 (2013.01); H01P 1/20363 (2013.01); H01P 3/081 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An equivalent filter circuit, comprising:
at least one first equivalent transmission line model, comprising:
a first master transmission conductor, connected at a left end thereof to a signal input port, and connected at a right end thereof to a signal output port; and
a first slave transmission conductor;
at least one second equivalent transmission line model, comprising:
a second master transmission conductor connected at a left end and a right end thereof to a reference potential; and
a second slave transmission conductor connected at a right end thereof to a right end of the first slave transmission conductor; and
at least one first impedance unit connected between a left end of the first slave transmission conductor and a left end of the second slave transmission conductor in series.