Open AccessKa‐band coupled‐resonator bandpass filter based on printed ridge gap waveguide for millimetre‐wave application
Author(s) -
Hu Xiaojun,
Xu Feng
Publication year - 2021
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12259
Subject(s) - band pass filter , return loss , stub (electronics) , passband , resonator , insertion loss , materials science , acoustics , electromagnetic simulation , waveguide filter , filter (signal processing) , optics , electronic engineering , optoelectronics , prototype filter , low pass filter , electrical engineering , physics , engineering , antenna (radio)
A low‐loss Ka‐band coupled‐resonator bandpass filter based on the printed ridge gap waveguide (PRGW) technology is presented for millimetre‐wave communication applications. The PRGW is employed to allow electromagnetic‐wave propagation in the air gap in order to avoid dielectric loss and improve transmission performance which is suitable for millimetre‐wave applications. The bandpass filter is implemented with two transmission zeros which are easily obtained by adjusting the stub length of two T‐shape stub‐loaded resonators (SLR). From its simulation frequency response, the filter has an insertion loss of 0.8 dB, a return loss less than −20 dB during the passband and high selectivity in cut‐off frequency. The prototype of the proposed filter is fabricated and tested and a good agreement can be observed between the measured and simulated results.