volume | PIER Journals

Abstract

This article presents a dual-band switchable and tunable band-pass filter for Bluetooth and 5G NR applications. The filter functions at 2.41 GHz for Bluetooth and 3.55 GHz for 5G, utilizing independent switching and tuning methods facilitated by PIN and varactor diodes. The suggested design exhibits compact dimensions of 0.177λ_g x 0.096λ_g, a minimal insertion loss of 0.35 dB, and a substantial return loss of 30 dB. Advanced design methodologies, including defective ground structures (DGS) and eigenmode analysis, were utilized to attain precise selectivity and exceptional out-of-band rejection. The engineered filter demonstrates superior performance, with outcomes closely aligning with models, and guarantees little interference with suppression up to 10 GHz. The tuning mechanism provides versatility by independently modifying the operating frequencies of the second band, rendering the design very flexible for dynamic wireless communication settings. This study emphasizes a robust and effective answer for contemporary mobile communication systems.

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Ms. Areeg F. Hussein

Dr. Malik Jasim Farhan

Prof. Jawad K. Ali