Design of Band-Notched UWB BPF with Very Wide Upper Stopband Using Combined λ/4 TSSIR

Wang, I-C.; Lee, C.-H.; Hsu, Che Ju

doi:10.1163/156939309787604463

Cited by 5 publications

(6 citation statements)

References 22 publications

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“…In the recent years, various modified multi-mode resonators (MMR) have been proposed to improve the performances of UWB BPF. [2][3][4][5][6][7][8][9][10][11][12] In Ref. 3, a modified U-shaped MMR which has five resonance frequencies was used to improve the selectivity at upper edge of the passband.…”

Section: Introductionmentioning

confidence: 99%

“…Since the US Federal Communication Commission (FCC) authorized the ultra‐wideband (UWB) spectrum (3.1 to 10.6 GHz) for commercial use in 2002, the UWB bandpass filter (BPF), as a key passive component in UWB system, has received countless interest. In the recent reported literatures, several methods and structures have been proposed to implement UWB BPF with compact size, sharp roll‐off, low insertion loss, and wide bandwidth . Among the reported UWB BPF, the interdigital coupled‐line, which can create an UWB bandpass response is the most widely used structure.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, some other structures are introduced to improve the performances of these filters based on interdigital coupled‐line. In the recent years, various modified multi‐mode resonators (MMR) have been proposed to improve the performances of UWB BPF . In Ref.…”

Section: Introductionmentioning

confidence: 99%

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A compact ultra‐wideband bandpass filter with good selectivity based on interdigital coupled‐line

Xia

Chen

Cheng

et al. 2018

Int J RF Microw Comput Aided Eng

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In this article, a compact ultra‐wideband (UWB) bandpass filter (BPF) with sharp selectivity using interdigital coupled‐line is proposed. Its input signal propagates through two different signal paths. The main transmission path consists of two coupled‐line line structures, and the other signal path is a microstrip loaded by two short‐circuited stubs. Comparing with some other UWB filters based on interdigital coupling three lines, the selectivity of the proposed filter is significantly improved due to the two transmission zeros located at the lower and upper edge of the passband separately. Moreover, its transmission zeros are analyzed by ABCD parameter matrix. A prototype of the proposed filter is fabricated and measured, the results show that the proposed filter achieve a bandwidth of 126% from 2.95 to 13.05 GHz, and a size reduction of 37.3% compared to the former UWB BPF with similar structure. Besides, the proposed filter can offer some other advantages such as good return loss, low insertion loss, compact size(0.48λg × 0.08λg), and stable group delay at UWB frequencies. This filter can be a good candidate for ultra‐wideband applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A compact ultra‐wideband bandpass filter with good selectivity based on interdigital coupled‐line

Xia

Chen

Cheng

et al. 2018

Int J RF Microw Comput Aided Eng

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show abstract

“…In recent years, several methods and structures have been proposed to implement UWB bandpass filter (BPF) with compact size, sharp roll-off, low insertion loss and wide bandwidth [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Among the reported UWB BPFs, the interdigital coupled-line, which can create a UWB bandpass response and the multi-mode resonators (MMR) are the most widely used structures [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, the stepped-impedance stub-loaded resonators were often applied in UWB BPF to improve the out-of-band performances in [4,5]. The upper stopband performances were improved by introducing tri-section stepped-impedance resonators (TSSIR) in [6,7]. However, the selectivity is bad because there was no transmission zero in the low frequency band not including 0 GHz.…”

Section: Introductionmentioning

confidence: 99%

A Compact Ultra-Wideband Bandpass Filter With Sharp Roll-Off Based on CPW-to-Microstrip Coupling Structure

Wang¹,

Chun-hui²,

Xia³

et al. 2017

PIER Letters

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Abstract-In this paper, a compact ultra-wideband bandpass filter using a back to back Coplanar Waveguide (CPW)-to-microstrip transition structure is proposed. Compared with traditional ultrawideband bandpass filters using hybrid structures, the proposed filter has a sharper selectivity because of two transmission zeros located at the lower and upper edges of the passband, respectively, generated by a modified T-shaped stub. Moreover, to further improve its out-of-band performance open stubs are introduced to produce extra transmission zeros at high frequency. A prototype of the proposed filter is fabricated and measured. The results show that the proposed filter achieves a bandwidth of 133% from 2.4 to 11.9 GHz, and the selectivity (skirt factor) is optimized from 50% to 92% compared to a former ultra-wideband (UWB) bandpass filter (BPF) with a similar structure. Besides, the proposed filter can offer some other advantages such as good return loss, low insertion loss, stable group delay, and compact size (16 × 7.55 mm 2 ). This filter can be a good candidate for UWB applications.

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Design and Analysis of Spurious Harmonics Suppressed Microstrip Ultrawide Band Filter using Modified Defected Ground Structure Techniques

Bohra

Ghosh

Bhaskar

2021

Wireless Pers Commun

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Design of Band-Notched UWB BPF with Very Wide Upper Stopband Using Combined λ/4 TSSIR

Cited by 5 publications

References 22 publications

A compact ultra‐wideband bandpass filter with good selectivity based on interdigital coupled‐line

A compact ultra‐wideband bandpass filter with good selectivity based on interdigital coupled‐line

A Compact Ultra-Wideband Bandpass Filter With Sharp Roll-Off Based on CPW-to-Microstrip Coupling Structure

Design and Analysis of Spurious Harmonics Suppressed Microstrip Ultrawide Band Filter using Modified Defected Ground Structure Techniques

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