Novel Band-Notched Uwb Bandpass Filter Using Microstrip/Slotline Ring Resonators

Abstract

Abstract-A novel ultra-wideband (UWB) bandpass filter (BPF) with notched band based on microstrip/slotline ring resonators is presented in this paper. The UWB BPF is fabricated with two microstrip ring resonators on the top copper layer and a slotline ring resonator on the bottom ground layer. Thus, an ultra-wide passband can be achieved owing to the coupling effects and microstrip/slotline transitions of these three ring resonators. Then, a notched band which is created at 8.0 GHz for satellite communication system is designed based on loaded short-circuited stubs. Both the simulated and measured results show that this compact UWB BPF has good performances of wide passband and notched band.

Design of UWB Bandpass Filter with Notched Band Using Distributed CRLH Transmission Lines

“…A UWB notch-band BPF using multiple slotline resonators on the ground was presented in (Song et al, 2012). Recently, a compact band-notched UWB BPtF with microstrip/slotline ring resonators and microstrip short circuited stubs was presented in Cui et al (2014). A stubs-loaded slotline MMR fed by two microstrip lines achieved a UWB bandpass characteristic and a notched band was created by loading a stub-loaded, dual-mode microstrip resonator to the slotline MMR (Guan et al, 2014).…”

“…The measured group delay varies between 0.28 and 0.65 nsec with a maximum variation of 0.37 nsec over its entire passband. The fabricated UWB BPF is more compact than the example inGuan et al (2014) andZheng et al (2014) and has a simpler structure compared with that ofSong et al (2012),Cui et al (2014),Guan et al…”

Uwb Bandpass Filter With Hybrid Structure and Two Transmission Zeros in the Notched Band

“…Compared to microstrip structure, there is little work on hybrid microstrip and coplanar-waveguide structure relatively. In [3][4][5], a broadside-coupled microstrip-coplanar waveguide structure was proposed with a tightened coupling degree is utilized to design an UWB filter. A bandpass filter with CPW feed-line and microstrip resonator was presented in [6].…”