Title :
New compact bandpass filter using microstrip /spl lambda//4 resonators with open stub inverter
Author :
Lee, Jae-Ryong ; Cho, Jeong-Hoon ; Yun, Sang-Won
Author_Institution :
Dept. of Electron. Eng., Sogang Univ., Seoul, South Korea
Abstract :
A novel bandpass filter using microstrip quarter-wavelength resonators is proposed. The proposed filter consists of the open stub inverter between quarter-wavelength resonators, which results in a compact design as well as low loss. The tapped open stub not only works as a K-inverter but also introduces an attenuation pole. The attenuation pole can be located at the upper or lower side of the passband by adjusting the open stub length. A two-pole Chebyshev bandpass filter is designed and tested at 1.99 GHz. A four-pole bandpass filter of elliptic-type performance is also designed and tested at 2.015 GHz.
Keywords :
Chebyshev filters; UHF filters; band-pass filters; elliptic filters; microstrip filters; microstrip resonators; passive filters; poles and zeros; resonator filters; 1.99 GHz; 2.015 GHz; K-inverter; attenuation pole; compact bandpass filter; elliptic-type performance; four-pole bandpass filter; low loss design; microstrip resonators; open stub inverter; quarter-wavelength resonators; tapped open stub; two-pole Chebyshev filter; Attenuation; Band pass filters; Impedance; Insertion loss; Inverters; Microstrip filters; Microstrip resonators; Passband; Resonator filters; Testing;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
