𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A compact microstrip interdigital stepped-impedance band-pass filter with enhanced stop band

✍ Scribed by John R. Crute; Lionel E. Davis

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
134 KB
Volume
34
Category
Article
ISSN
0895-2477

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Microstrip bandpass filters are widely used in a variety of microwave subsystems to select a desired band of frequencies. However, common filter topologies with uniform impedance resonators exhibit poor stop‐band performance. This is due to the occurrence of harmonic passbands at multiples of the fundamental passband frequency. This study describes the design of a compact interdigital microstrip filter, using short‐circuit stepped‐impedance resonators (SCSIRs) to enhance the harmonic stop‐band response. Measurements on an experimental filter, with a design center frequency of 2442 MHz and 3‐dB bandwidth of 611 MHz (25%), show an increase in the first harmonic passband frequency to 8809 MHz. At three times the fundamental passband center frequency (7326 MHz), stop‐band attenuation is better than −35 dB. The results demonstrate the usefulness of SCSIRs for improving the stop‐band performance of interdigital bandpass filters, with only a small increase in overall size. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 336–340, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10455

📜 SIMILAR VOLUMES

Compact microstrip stepped-impedance hai
Compact microstrip stepped-impedance hairpin resonator low-pass filter with aperture
✍ Ju-Hyun Cho; Jong-Chul Lee 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 227 KB

A new microstrip stepped-impedance hairpin resonator (SIR) low-pass filter (LPF) using aperture is proposed. This filter has the advantages of compact size and easy fabrication. Also, it provides a very sharp cutoff-frequency response with low insertion loss of 0.13 dB and wide-stopband characterist

Design of a compact, wide stopband micro
Design of a compact, wide stopband microstrip band-pass filter
✍ Lin Peng; Cheng-li Ruan; Chao-yuan Ding; Mao-hui Yang 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 181 KB

## Abstract We proposed a compact microstrip band‐pass filter with wide stopband in this article.Microstrip gap and interdigital capacitor combine with stub inductors shorted to the ground plane by via were used to take advantage of different aspects of left‐handed behavior to achieve compact size

A compact dual-band bandpass filter usin
A compact dual-band bandpass filter using meandering stepped impedance resonators
✍ Fu-Chang Chen; Qing-Xin Chu 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 204 KB

## Abstract We propose a compact dual band bandpass filter (BPF) using meandering stepped impedance resonators (SIRs). By appropriately selecting the impedance ratio (K) of the SIR, the harmonic frequencies can be tuned for generating the dual‐passband response. Using this structure, the bandwidth

Design of stepped-impedance hairpins ban
Design of stepped-impedance hairpins band-pass filter with wide stopband performance
✍ Min-Hua Ho; Wei-Chen Lin 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 474 KB

## Abstract In this article, the band‐pass filter (BPF) of stepped‐impedance hairpin (SIH) design having a very wide stopband performance was proposed.The filter composed of two SIHs connected by a narrow bended microstrip with the latter's middle point shorting to the ground through a via hole. A

Design of compact microstrip dual-band b
Design of compact microstrip dual-band bandpass filters with λ/4 stepped-impedance resonators
✍ He-Kai Jhuang; Ching-Her Lee; Chung-I. G. Hsu 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 286 KB

## Abstract This article presents a compact microstrip bandpass filter (BPF) design for the 2.45 and 5.25 GHz wireless local‐area network (WLAN) applications. U‐shaped quarter‐wavelength stepped‐impedance resonators (λ/4 SIRs), for which the circuit size is small and the second resonant frequency c

Design of compact microstrip band-pass f
Design of compact microstrip band-pass filter with ultra-wide stopband
✍ Ko-Wen Hsu; Wen-Hua Tu 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 475 KB

We present the development of a miniaturized broadband Wilkinson power divider on a multilayer organic substrate with integrated thin film resistors. The VSWR for all port for both dividers is better than 1.6:1, the excess insertion loss is less than 1.6 dB up to 18 GHz, and 12 dB of isolation is re