Premium
A compact tri‐band bandpass filter using novel stub‐loaded resonator
Author(s) -
Yu Bin,
Jia Baofu,
Zhu Zhaojun
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29439
Subject(s) - stub (electronics) , passband , band pass filter , resonator , microwave , acoustics , physics , center frequency , materials science , optoelectronics , electronic engineering , optics , electrical engineering , engineering , telecommunications
In this letter, a compact tri‐band bandpass filter (BPF) using novel stub‐loaded resonator is proposed. The resonator consists of one short stub and four open stubs which are symmetric about the middle open stub. Two coupling gaps were formed by the four bended open stubs, which contribute to the performance of second and third passband. The filter was designed, fabricated, and measured. Three passbands were designed to operate at 1.0, 2.4, and 3.5 GHz, respectively. The measured results of the tri‐band BPF exhibit a reasonable agreement with simulated results. The circuit only occupies 0.106 λ g × 0.064 λ g , where λ g is the guided wavelength at lower passband center frequency. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2797–2800, 2015