Quasi-elliptic Triple Passband Filter Using Stub Loaded Step Impedance Resonator and Non-resonating T structure
Year: 2023
Type: article
Abstract: This article presents a simple method to introduce multiple Transmission Zeros in the stopbands of a triple passband Chebyshev filter and also suppress the spurious bands below a satisfactory level, so that it can be treated as a Quasi-Elliptic filter.A pair of Stub Loaded Step Impedance Resonators (SLSIRs) is used to produce the Chebyshev filter with central passbands at 2.5, 5.5, and 9 GHz.An asymmetric Non-Resonating T (NRT) structure is implemented on each of the SLSIRs to achieve the improved skirt selectivity.Each non-resonating structure produces three Transmission Zeros (in total six).In addition to the satisfactory stopband performances, the Quasi-Elliptic triple band filter produces insertion losses of |0.4|, |0.6|, and |0.7| dB at three centre frequencies, respectively.Simulation of the proposed filter is done using HFSS13 software, and to validate the simulation, a prototype is fabricated on an Arlon AD250 (Dielectric Constant 2.5, height 0.76 mm) substrate.
Authors: Anirban Neogi, Jyoti Ranjan Panda
Institution: KIIT University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4385153451