Novel Design of Dual -Mode Bandpass Filter Using Rectangle Structure

Zhao, Li-Peng; Zhai, Xiaofang; Wu, Bian; Su, Tao; Xue, Wei; Chen, Liang

doi:10.2528/pierb07121003

Cited by 46 publications

(28 citation statements)

References 27 publications

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“…Reported in [3], is a rectangular dual mode resonator with low insertion and return loss bandpass filter. The −3 dB cut off frequency bandwidth is from 4.94 GHz to 6.10 GHz.…”

Section: Introductionmentioning

confidence: 99%

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Novel Compact "Via-Less" Ultra-Wide Band Filter Utilizing Capacitive Microstrip Patch

Razalli¹,

Ismail²,

Mahdi³

et al. 2009

PIER

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Abstract-This paper presents a novel compact "via-less" UWB filter derived from a quarter-wavelength short-circuited stubs model. In this compact "via-less" UWB filter, there is no connecting vias as short circuit elements. Unlike its previous model that has 5 short-circuited stubs, this novel shape consists of two pairs of stubs which are joint together to share on the same microstrip patch and thus reduces total size of the UWB filter itself making it more compact in nature. With proper width optimization, the microstrip patch is able to decouple and provides low impedance to the ground in the UWB frequencies range. The filter delivers 3.85 GHz to 10.44 GHz frequency range with 92.23% of fractional bandwidth. The magnitude of insertion loss is below than 0.53 dB and the return loss is lower than −14.8 dB in the passband frequencies. The −3 dB bandwidth is from 3.85 GHz to 10.44 GHz with 92.23% of fractional bandwidth. The group delay only varied by 0.47 ns in the passband, which makes it suitable for radio communication systems.

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“…Reported in [3], is a rectangular dual mode resonator with low insertion and return loss bandpass filter. The −3 dB cut off frequency bandwidth is from 4.94 GHz to 6.10 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…Several reports have been published in [2][3][4][5][6][7][8][9][10][11][12] with a variety of new methods, techniques and formulas in bandpass filter studies. As reported in [2] is a compact coplanar waveguide structure which is developed from a quasi-lumped elements.…”

Section: Introductionmentioning

confidence: 99%

Novel Compact "Via-Less" Ultra-Wide Band Filter Utilizing Capacitive Microstrip Patch

Razalli¹,

Ismail²,

Mahdi³

et al. 2009

PIER

View full text Add to dashboard Cite

show abstract

“…As reported in [14] is a designed method to optimize an open-end effect in parallel-coupled microstrip bandpass filters which has delivered higher efficiency and accuracy. Two types of coupled resonators as reported in [15,16] are bandpass filters. In [15], it performs UWB frequency response from 1 GHz to 4.6 GHz with 128% of fractional bandwidth and [16] is a dual mode resonator which performs a narrow-band frequency response.…”

Section: Introductionmentioning

confidence: 99%

“…Two types of coupled resonators as reported in [15,16] are bandpass filters. In [15], it performs UWB frequency response from 1 GHz to 4.6 GHz with 128% of fractional bandwidth and [16] is a dual mode resonator which performs a narrow-band frequency response. A compact bandpass filter utilizing dielectric filled waveguides is presented in [17].…”

Section: Introductionmentioning

confidence: 99%

“…Several experiments, methods and techniques had been studied purposely to expand the bandwidth of bandpass filters in the past decade. Some of them were employing methods from dielectric filled waveguides, trisection substrate-integrated waveguide, resonators, coplanar waveguide, quarter-wavelength short-circuited stubs and/or open-circuited stubs, and hairpin [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Novel Compact Microstrip Ultra-Wideband Filter Utilizing Short-Circuited Stubs With Less Vias

Razalli¹,

Ismail²,

Mahdi³

et al. 2008

PIER

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Abstract-We present here a new pattern with compact size of Ultra Wideband (UWB) microwave filter. The filter is based on quarter-wave length short-circuited stubs model. We introduced here a new schematic model by extracting all parasitic elements such as Tjunction and discontinuity in our new pattern of UWB filter. This new filter has minimal number of vias and improved frequency bandwidth, insertion loss and return loss. It is fabricated on RT Duroid 5880 with 0.508 mm of substrate thickness. The final dimension is measured as 21 mm × 14 mm. It is not only compact, but also delivers excellent scattering parameters with magnitude of insertion loss, |S 21 | lower than 0.85 dB and return loss better than −11.6 dB. The fractional bandwidth is 109% from 3.06 GHz to 10.43 GHz. In the pass band, the measured group delay varies in between 0.47 ns to 0.32 ns, showing stability with minimum variation of only 0.15 ns. † The first author is also with School of Computer and Communication Engineering,

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Miniaturized reconfigurable band‐pass filter with electronically controllable for WiMAX/WLAN applications

Mazloum

Jalali

Ojaroudi

2013

Micro & Optical Tech Letters

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A novel reconfigurable band‐pass filter for worldwide interoperability for microwave access (WiMAX)/wireless local area network (WLAN) applications is presented. By using an H‐shaped strip with a pair of C‐shaped slots in the band‐pass filter two new resonances can be achieved. The proposed band‐pass filter has three different switchable states: 2.25–10.72 GHz in WLAN mode, 3.34–3.71 GHz in WiMAX mode, and 1.65–1.89 GHz in narrowband mode. The band‐pass filter which uses a switchable slotted structure for reconfigurability has a simple structure and smallest size in comparison to band‐pass filters reported in literature (Kikkert, TENCON 2005 IEEE region 10, 2005, Fan et al., Prog Electromagn Res 75 (2007), 285–293, Wang et al., Prog Electromagn Res 77 (2007), 67–73, Ojaroudi et al., Advanced electromagnetics symposium, 2012, Zhao et al., Prog Electromagn Res B 3 (2008), 131–141). Also the proposed filter has a major advantage in providing tighter capacitive coupling to the line in comparison to known radiating strip. To generate DC isolation in the RF path, we use a pair of gap distances in the microstrip loop. Simulated and experimental results obtained for this band‐pass filter show that the proposed band‐pass filter has a good return and insertion loss within the WiMAX/WLAN frequency range. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:509–512, 2014

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Novel Design of Dual -Mode Bandpass Filter Using Rectangle Structure

Cited by 46 publications

References 27 publications

Novel Compact "Via-Less" Ultra-Wide Band Filter Utilizing Capacitive Microstrip Patch

Novel Compact "Via-Less" Ultra-Wide Band Filter Utilizing Capacitive Microstrip Patch

Novel Compact Microstrip Ultra-Wideband Filter Utilizing Short-Circuited Stubs With Less Vias

Miniaturized reconfigurable band‐pass filter with electronically controllable for WiMAX/WLAN applications

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