Open AccessLossy flat‐passband signal‐interference microstrip filter
Author(s) -
GómezGarcía Roberto,
MuñozFerreras JoséMaría,
Yang Li,
Feng Wenjie
Publication year - 2019
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.2018.8049
Subject(s) - passband , lossy compression , microstrip , band pass filter , electronic engineering , acoustics , resonator , signal (programming language) , insertion loss , filter (signal processing) , resistor , transmission (telecommunications) , telecommunications , physics , computer science , electrical engineering , optics , engineering , voltage , artificial intelligence , programming language
A type of lossy transversal‐signal‐interference planar bandpass filter (BPF) with a flattened passband is reported in this Letter. The authors exploit in‐series‐cascaded transversal filtering sections composed of two in‐parallel transmission‐line segments and series‐type lossy hybrid resonators connected at their input / output accesses. The resistors of these lossy resonators by dissipating part of the RF‐input‐signal energy in the BPF passband region following a complementary frequency‐variation profile with regard to the one associated with conventional substrate filter loss allow obtaining an overall flattened transmission band. To experimentally validate the proposed approach, a 2 GHz microstrip prototype of a sharp‐rejection lossy signal‐interference BPF with a flattened passband is developed and characterised.