Year: 2025
Type: article
Abstract: ABSTRACT With the rapid deployment of fifth‐generation (5 G) mobile communication technology, radio frequency (RF) front‐end components require higher performance to suppress interference in the n1 frequency band (1920–2170 MHz) coexisting systems. This paper proposes a compact bandstop filter (BSF) based on complementary split‐ring resonator (CSRR) integrated with defected ground structure (DGS), occupying dimensions of 0.58λg × 0.72λg. Experiments results demonstrate operation at 2.07 GHz center frequency with 24.2% fractional bandwidth (1.82–2.32 GHz), achieving > 23.6 dB stopband suppression and < 0.5 dB passband insertion loss. An equivalent circuit model based on transmission line theory exhibits close agreement with measurements, confirming the hybrid structure′s effectiveness in suppressing spurious responses. This design achieves a balance between compact dimensions and high stopband performance, offering an efficient solution for 5 G base stations.
DOI: 10.1002/mop.70437
Authors: Xiao Jin, Hao Wang, Shanshan Xiao, Gui Liu
Institution: Wenzhou University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7093356422