Theory and design of narrowband band-stop filters using slotted ground resonators

Article type: Research Article

Authors: C.R., Lakshmi^a | Kannadassan, Dhanaraj^a;

Affiliations: [a] School of Electronics Engineerring, Vellore Institute of Technology, Vellore, Tamil Nadu, India

Correspondence: [*] Corresponding author: D. Kannadassan, School of Electronics Engineerring, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India. Tel.: +91 416 220 2372; E-mail: dkannadassan@vit.ac.in

Abstract: This paper reports the demonstration of design and implementation of narrow band band-stop filters using slotted ground resonators. Using coupled-mode resonator theory, the systematic implementation of BSFs are performed to achieve narrow stopband (<25% FBW) with desired stopband isolation. By exchanging the band-pass transfer function polynomials, the BSF design has become straight-forward with these band-stop resonators. Designed and optimized BSFs are fabricated, characterized and analysed as a detailed report. Slotted ground resonators yield compact and scalable BSFs which are potential alternatives for the development of future microwave systems.

Keywords: Slotted ground resonators (SGR), band stop filters (BSF), fractional bandwidth (FBW), coupled resonators

DOI: 10.3233/JAE-210019

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 67, no. 4, pp. 393-407, 2021