UWB‐BPF based on broadside coupled technology with triple‐notched passband

Abstract

A miniaturized ultra‐wideband (UWB) bandpass filter (BPF) based on broadside coupled technology with multiple passband notches is reported. The basic geometry of BPF has microstrip lines on the top plane coupled to the modified short‐circuited coplanar waveguide in the bottom plane. This broadside alignment leads to the development of a UWB response with good frequency characteristics due to the presence of two transmission zeros at lower/upper passband edges. Later, multiple circular resonators and one complimentary folded split ring resonator are embedded into the basic architecture to develop triple passband notches at our frequencies of interest. Eventually, a prototype is fabricated and tested to validate the simulated data. The proposed BPF occupies a minimal physical area of 14 × 11.4 mm2.

A Miniaturized UWB Bandpass Filter Employing Multi-Stub-Loaded Short-Circuited Stepped Impedance Ring Resonator

“…Nevertheless, [15][16] also use an asymmetric, irregular SIR to produce the BPF. Another method is to employ coplanar waveguide and hybrid microstrip technology [17][18], which requires a substrate with a relatively high dielectric constant and results in lower circuit size. Unfortunately, such BPFs may not have good harmonic rejection.…”