Open AccessVialess vertical microstrip‐to‐microstrip transition using open slot‐line
Author(s) -
Liu Gang,
Li Lin,
Xiao Yang,
Chen SiSi
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.2000
Subject(s) - microstrip , passband , bandwidth (computing) , ground plane , transmission line , optics , wavelength , equivalent circuit , materials science , physics , electronic engineering , optoelectronics , telecommunications , band pass filter , electrical engineering , engineering , voltage , antenna (radio)
A new wide‐band, low‐loss and compact vertical microstrip‐to‐microstrip transition is presented. The proposed structure consists of two quarter‐wavelength open‐circuited microstrip lines and a quarter‐wavelength open slot‐line etched on the common ground plane. The theoretical analysis based on equivalent‐circuit model reveals that the proposed transition exhibits ultra‐wide passband with three transmission poles. To effectively enhance the bandwidth, the optimised parameters are obtained by the transmission poles separations. Finally, a transition having a wide fractional bandwidth of 114% is achieved with the compact size of 8.75 mm × 4.2 mm. Predictions are well verified by measurements over a wide frequency range.