A Novel Compact Ultra-Wideband Bandpass Filter Using a Microstrip Stepped-Impedance Four-Modes Resonator

Cai, Peng; Ma, Zhewang; Guan, Xuehui; Kobayashi, Yoshihiro; Anada, Tetsuo; Hagiwara, Gen

doi:10.1109/mwsym.2007.380048

Cited by 55 publications

(30 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of methods have been reported in the literature [2][3][4][5][6][7][8] to design the UWB bandpass filters. An early method reported in [2] is based on cascaded low-pass-high-pass filter sections.…”

Section: Introductionmentioning

confidence: 99%

“…A hybrid microstrip/CPW structure with back-toback transition configuration is used in [3] to achieve the UWB bandpass response. In [4], a stepped impedance fourmode resonator is developed on the method of network analysis and optimization in Z-domain. Today, a major class of available UWB filters are based on the multiple-mode resonators (MMR) and are quite popular due to their easy design methods and simple structures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel Notched UWB Filter Using Stepped Impedance Stub Loaded Microstrip Resonator and Spurlines

Uikey

Sangam

Prasadu³

et al. 2015

International Journal of Microwave Science and Technology

View full text Add to dashboard Cite

This paper presents a novel ultrawideband (UWB) bandpass filter using stepped impedance stub loaded microstrip resonator (SISLMR). The proposed resonator is so formed to allow its four resonant frequencies in the UWB passband, which extends from 3.1 GHz to 10.6 GHz. Moreover, two spurline sections are employed to create a sharp notched-band filter for suppressing the signals of 5 GHz WLAN devices. Experimental results of the fabricated filters are in good agreement with the HFSS simulations and validate the design.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Notched UWB Filter Using Stepped Impedance Stub Loaded Microstrip Resonator and Spurlines

Uikey

Sangam

Prasadu³

et al. 2015

International Journal of Microwave Science and Technology

View full text Add to dashboard Cite

show abstract

“…A synthesis approach for multistage step-impedance resonator (SIR)-type (or MMR-type) UWB filters are proposed [8][9][10][11][12][13] to achieve Chebyshev-type UWB filters. According to the conclusions in [10,11], to meet FCC's specifications, especially at lower stopband, at least two stages of one-wavelength SIR resonators should be used.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of compact UWB bandpass filter with improved performances

Chen

Hiroshige

et al. 2010

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

This article presents a synthesis of the ultra-wideband bandpass (UWB) filters consisting of two short-circuited stubs combined with two stages of stepped impedance resonators (SIRs). The practical and theoretical transfer functions of the proposed UWB filters are derived. An example filter is firstly theoretically-designed by the proposed synthesis procedure, then optimized by EM simulator, fabricated in microstrip line and finally characterized by a network analyzer. A good agreement between the theoretical and experimental results validates the proposed synthesis procedure successfully. In addition, the results of the designed filter show that the characteristics of the new filter is even better than those of a conventional filter composed of three-stage of SIRs but without stubs. This means the proposed filters have compact sizes compared with the conventional ones. The designed filter also exhibits good characteristics of low insertion losses, quite sharp skirts, a flat group delay, deep attenuations in stopband (especially in lower one), and satisfies even FCC outdoor specifications.

show abstract

“…Based on a concept of a multiple-mode resonator, novel filters with an excellent passband and well-suppressed out-of-passband responses have been realized [2][3][4]. As another approach, a compact planar UWB bandpass filter with deep transmission zeros and a mild in-band group delay, was realized by using tightly coupled E-shaped electrodes [5], and useful design guidelines were reported [6].…”

Section: Introductionmentioning

confidence: 99%

Ultra-wideband (UWB) bandpass filter composed of asymmetric E-shaped electrodes for improved out-of-passband

Kaneko

Azuma

Ishikawa

et al. 2008

2008 Asia-Pacific Microwave Conference

View full text Add to dashboard Cite

IntroductionSince the Federal Communication Commissions (FCC) adopted a First Report and Order in 2002 [1], the research of ultra-wideband (UWB) devices has been greatly accelerated in the microwave and millimeter-wave society, and high performance and compact UWB filters have been proposed. Based on a concept of a multiple-mode resonator, novel filters with an excellent passband and well-suppressed out-of-passband responses have been realized [2-4]. As another approach, a compact planar UWB bandpass filter with deep transmission zeros and a mild in-band group delay, was realized by using tightly coupled E-shaped electrodes [5], and useful design guidelines were reported [6]. Furthermore, a chip-loaded planar UWB bandpass filter was proposed in order to relax fabrication difficulties of developing extremely small gap between the electrodes (8μm, for instance) [7], which idea is useful when supercompact planar UWB filters are designed using the higher permittivity substrate. In this paper, a UWB bandpass filter composed of asymmetric E-shaped electrodes is proposed so as to improve insufficient out-of-passband responses. The basic behaviour of the filter is studied by FEM-based simulations and the results are verified by experiments.

show abstract

A Novel Compact Ultra-Wideband Bandpass Filter Using a Microstrip Stepped-Impedance Four-Modes Resonator

Cited by 55 publications

References 6 publications

Novel Notched UWB Filter Using Stepped Impedance Stub Loaded Microstrip Resonator and Spurlines

Novel Notched UWB Filter Using Stepped Impedance Stub Loaded Microstrip Resonator and Spurlines

Synthesis of compact UWB bandpass filter with improved performances

Ultra-wideband (UWB) bandpass filter composed of asymmetric E-shaped electrodes for improved out-of-passband

Contact Info

Product

Resources

About