Title :
Continuously tunable substrate integrated waveguide bandpass filter in liquid crystal technology with magnetic biasing
Author :
Prasetiadi, A.E. ; Karabey, O.H. ; Weickhmann, C. ; Franke, T. ; Hu, W. ; Jost, M. ; Nickel, M. ; Jakoby, R.
Author_Institution :
Inst. fuer Mikrowellentech. und Photonik, Tech. Univ. Darmstadt, Darmstadt, Germany
Abstract :
A liquid crystal filled continuously tunable substrate integrated waveguide filter is proposed which has a high-quality (Q) factor. To measure the Q-factor, a single resonator measurement is performed by using magnetic biasing in a lab demonstrator for a proof of concept. The unloaded Q-factor is 102-105.6. The resonator is employed to create a three-pole Chebyshev filter with a centre frequency of 22 GHz and a bandwidth of 600 MHz. Measurement results show a 6 dB insertion loss with a return loss of about 10 dB. The filter is continuously tunable within a tuning range of 610 MHz.
Keywords :
Chebyshev filters; Q-factor; band-pass filters; liquid crystal devices; microwave filters; substrate integrated waveguides; waveguide filters; Q-factor; bandwidth 600 MHz; continuously tuneable substrate integrated waveguide bandpass filter; frequency 22 GHz; frequency 610 MHz; high-quality factor; lab demonstrator; liquid crystal filled substrate integrated waveguide filter; loss 6 dB; magnetic biasing; single resonator measurement; three-pole Chebyshev filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2015.2494
