High Selectivity Wideband Bandpass Filter Based on Transversal Signal-Interaction Concepts and T-Shaped Structure

Feng, Wenjie; Che, Wenquan; Shi, Suyang; Xue, Quan

doi:10.1109/lmwc.2012.2224651

Cited by 35 publications

(24 citation statements)

References 11 publications

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“…In References 3‐5, the reported filters utilize the stepped‐impedance technique to achieve a compact size. As for selectivity, there are generally two ways to realize it: increasing the order of filter and introducing the transmission zeros (TZs) 6,7 . Generally speaking, the second way has been widely used because increasing the order of filter increases the circuit size and IL.…”

Section: Introductionmentioning

confidence: 99%

Novel compact band‐pass filter with three transmission zeros

Xiao

Wang

Jiao

et al. 2020

Micro & Optical Tech Letters

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This article presents a novel compact band‐pass filter (BPF) using two stepped‐impedance resonators. The proposed resonator can work at two modes: quarter‐wavelength resonance mode and half‐wavelength resonance mode. The selectivity of proposed BPF is improved by three transmission zeros (TZs). For these three TZs, one is located at the lower out of band and the other two TZs are placed at the upper out of band. The measured results show that the fabricated filter achieves a pass‐band with insertion losses of 1.02 dB at 4.7 GHz and a stop‐band (both lower and upper) rejection larger than 27 dB. The operating bandwidth is 1.65 GHz and the fractional bandwidth is 30% with a compact size of 23 × 8.5 mm2.

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Section: Introductionmentioning

confidence: 99%

Novel compact band‐pass filter with three transmission zeros

Xiao

Wang

Jiao

et al. 2020

Micro & Optical Tech Letters

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“…Some mentioned researches were realized by using coupled lines [1,2] and some by using coupled lines and T-shaped structures [3,5,6]. The wideband bandpass filters in [7][8][9] and dual-bandpass filter in [10] were also realized by using coupled lines. Besides, other design methods of filter were also investigated in [11,12].…”

Section: Introductionmentioning

confidence: 99%

High Selectivity Wideband Bandpass Filter Based on Transversal Signal-Interaction Concepts Loaded With Open and Shorted Stubs

Cui¹,

Wang²,

Zhuang³

et al. 2016

PIER Letters

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Abstract-A new design of high selectivity wideband bandpass filter based on transversal signalinteraction concepts loaded with open and shorted stubs is proposed in this paper. Two transmission paths are used to realize signal transmission. Path 1 is composed of a T-shaped structure with shorted stub, and Path 2 consists of two open coupled lines loaded with open stubs. A wide five-order passband and high selectivity stopband with four transmission zeros can be achieved in the proposed filter. Finally, a wideband bandpass filter operating at 3 GHz with 3-dB fractional bandwidth of 83.3% (1.55 to 4.05 GHz) is designed, fabricated, and measured. Good agreement between the simulation and experiment is obtained.

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“…Multi-mode resonators formed by half-wavelength resonators and tapping shunt open/shorted stubs are a good choice for realising high-selectivity bandpass filters with a high-order passband; [21][22][23][24][25][26][27] in addition, for the conventional two/three coupled-line filters, open/shorted loaded stubs connected to the input/output coupled lines can also increase additional pairs of transmission zeros near each passband. [28][29][30][31] However, little research has been done to describe the applications of input/output coupled lines with open/shorted loaded stubs in balancedfilter structures -especially for common mode suppression with multiple transmission zeros for balanced-filter structures.…”

Section: Introductionmentioning

confidence: 99%