Configuration of a stepped impedance bandpass filter

Abstract

This paper describes the design of a compact stripline ceramic filter, using short‐circuit stepped‐impedance resonators (SIRs) to enhance the harmonic stop‐band response. Moreover, this filter has a very small size of 3.6 mm × 3.0 mm × 0.5 mm and a low insertion loss of 0.6 dB in the passband. The filter's response, with a design center frequency of 2390 MHz and 3‐dB bandwidth at 250 MHz (10.4%), shows an increase in the first harmonic frequency to 9004 MHz. At three times the fundamental passband frequency (7160 MHz), stop‐band attenuation is better than −40 dB. The results demonstrate the usefulness of SIRs for improving the stop‐band performance of bandpass filters. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 39: 380–383, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11224

Design of Multilayer LTCC Bandpass Filter with Low Loss and High Suppression Using SIR Structure

“…The bandpass filter is a vital component in the receiver/transmitter. Low temperature cofired ceramic (LTCC) technology and high dielectric constant ceramic materials have been employed to miniaturize filter structure [1][2][3][4]. The study reports a bandpass filter designed using LTCC technology and SIR structure in reference [3].…”

A LTCC Filter Using Multilayered Stepped Impedance Resonators

“…Multilayered technology using low temperature co‐fired ceramic (LTCC) is an effective method to solve the problem . LTCC technology has been used to miniaturize filter structure and is a widely used multilayer technology for RF passive components due to the 3D integration capability, process tolerance, and high unloaded quality factor . Many researches have been done about the LTCC filters .…”