Title :
A Novel Quad-Band Bandpass Filter Using Short Stub Loaded E-Shaped Resonators
Author :
Tengfei Yan ; Xiao-Hong Tang ; Junfeng Wang
Author_Institution :
Inst. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this letter, a novel quad-band bandpass filter (BPF) using short stub loaded E-Type resonators is proposed. Two sets of resonators are utilized and respectively designed to realize Filter 1, operating at 2.4 and 3.5 GHz, and Filter 2 with two very closely spaced passbands, operating at 5.2 and 5.8 GHz. Then the two dual-band BPFs are combined by common feed lines with interdigital capacitance structure for quad-band responses, and two more transmission zeros (TZs) are achieved by strengthening the source-load coupling. The measured result of the fabricated filter agrees well with the simulation, which shows that the proposed structure is a good candidate for quad-band BPF designs and validates the proposed design flow well.
Keywords :
UHF resonators; band-pass filters; microwave resonators; BPF; TZ; dual-band BPF; frequency 2.4 GHz to 3.5 GHz; frequency 5.2 GHz to 5.8 GHz; interdigital capacitance; quadband bandpass filter; short stub loaded E-shaped resonator; source-load coupling; transmission zero; Band-pass filters; Couplings; Filtering theory; Microwave filters; Passband; Resonant frequency; Resonator filters; Dual mode resonator; quad-band bandpass filter; short stub loaded E-type resonator; source-load coupling;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2440655
