DESIGN AND ANALYSIS OF RECONFIGURABLE ULTRA-WIDE BAND PASS FILTER INTEGRATION WITH NOTCH BAND
Salah M. OBAID, Mithaq N. RAHEEMA, Raaed T. HAMMED
DOI: 10.15598/aeee.v23i3.250303
Abstract
Advancements in ultra-wideband reconfigurable band-pass filters (BPF) with notch band function are required for modern communication systems operating across a broad frequency spectrum. This paper introduces an innovative design of a reconfigurable UWB BPF with notch functionality covering two separate operating states: 1st operating frequency band of 3.7 GHz – 13 GHz with good insertion and return losses, at approximately 0.9 dB/58 dB respectively, and the 2nd operating frequency band from 2.7 GHz to 15 GHz incorporating 5.1 GHz – 5.3 GHz notch band with insertion and return losses of 1.3 dB/57 dB respectively, using PIN/Varactor switches. Subsequently, a notch filter is strategically integrated into the design to suppress unwanted frequencies, enhancing the filter’s selectivity and interference rejection capabilities. An experimental prototype for the reconfigurable filter with PIN diodes was fabricated to validate the effectiveness of the proposed design, demonstrating its suitability for UWB communication applications. Notably, the filter exhibits UWB characteristics, with a broad passband covering a wide frequency range with notch filtering to attenuate interfering signals. The compact size of the filter design 23.4 mm × 8.7 mm ensures practical integration into communication systems.