Premium
Dual‐band impedance transformer using two parallel open‐ and shorted‐stubs with total quarter guided wavelength
Author(s) -
Ma XingBing,
Jiang Ting
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30785
Subject(s) - stub (electronics) , quarter wave impedance transformer , transformer , impedance matching , electrical impedance , multi band device , wavelength , electronic engineering , transmission line , electrical engineering , engineering , acoustics , topology (electrical circuits) , physics , voltage , optics , damping factor , antenna (radio)
This article presents a dual‐band (DB) impedance transformer with novel parallel‐stubs‐loaded structure. The proposed transformer consists of a traditional single band matching network (SBMN) and a DB stubs‐loaded transmission‐line network in series. The DB stubs‐loaded MN features an open‐stub and a shorted‐stub in parallel with total length λ 1 /4 (λ 1 is guided wavelength from lower f 1 of two matching frequencies). The considered load has frequency‐dependent complex impedance at two uncorrelated frequencies ( f 1 , f 2 ). Design equations are presented, and required circuit parameters are all obtained adopting derived analytical design formula. Good agreements between simulation and measurement are observed.