Design of Novel Dual-Band Bandpass Filter With Microstrip Meander-Loop Resonator and CSRR DGS

Wu, Gao-Lei; Mu, Wei; Dai, Xi-Wang; Jiao, Yong‐Chang

doi:10.2528/pier07090301

Cited by 136 publications

(90 citation statements)

References 17 publications

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“…Recently, an open-loop filter with mixed coupling was studied for its transmission zeros at the lower and upper stopbands [17] and dualmode loop resonator also can achieve transmission zeros to improve out-of-band rejection [18,19].…”

Section: Introductionmentioning

confidence: 99%

Rotationally Symmetric Coupled-Lines Bandpass Filter With Two Transmission Zeros

Wong¹,

Wang²,

Chen³

et al. 2013

PIER

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Abstract-A rotationally symmetric short-circuited stub-loaded structure is proposed to design a microstrip-line bandpass filter with two transmission zeros near the lower and upper cut-off frequency edges of operating millimeter-wave bands. Furthermore, interdigital coupled-lines and additional resonators are integrated into the proposed rotationally symmetric bandpass filter to improve the out-of-band rejection. As design examples, the in-band and out-of-band performances of two filter prototypes using single layer microstrip-lines are designed and experimentally examined. The measured results show that the filter without any interdigital coupledlines achieves a passband insertion loss of 0.97 dB at 40 GHz and out-ofband rejection of larger than 23 dB, while the filter with the interdigital coupled-lines realizes the suppressions in lower and upper-bands of, respectively, larger than 30 dB and 19 dB for the overall insertion loss of 2.1 dB at 40 GHz.

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Section: Introductionmentioning

confidence: 99%

Rotationally Symmetric Coupled-Lines Bandpass Filter With Two Transmission Zeros

Wong¹,

Wang²,

Chen³

et al. 2013

PIER

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“…There are many methods to design multi-band filters, such as combining two single-band filters at different passband frequencies [1][2][3][4][5], adding defected stepped impedance resonator (DSIR) and microstrip stepped impedance resonator (MSIR) [6][7][8][9] or adding a couple of resonators [10][11][12][13]. The method of adding shunt open stub to the center of the resonator is used to design dual-band filter and there are three transmission zeros for the two passbands [14,15].…”

Section: Introductionmentioning

confidence: 99%

An Approach for Multi-Band Bandpass Filter Design Based on Asymmetric Half-Wavelength Resonators

Wang²

2013

PIER

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Abstract-This paper presents that the extra passband with two transmission zeros can be obtained by adding shunt open stubs to the asymmetric half-wavelength resonators structure. By using this method, a fourth or even higher passband with good selectivity and compact size can be obtained. Dual-band, tri-band and quad-band bandpass filters are demonstrated by using this method. The measured bandwidth is 80/180 MHz for the dual-band, 60/180/180 MHz for the tri-band and 130/360/170/70 MHz for the quad-band filter, respectively. The measured insertion loss for the dual-band, tri-band and quad-band filter is less than 2.7 dB, 2.5 dB and 2.9 dB at the center frequency. All the simulated results and the measured results agree well.

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“…On the other hand, in many cases of practical interest (cellular/PCS, WLAN, GSM/DCS and other dual-band applications [6][7][8][9]) impedance matching over two separate bands can be required. So, in the last years various design methods for dual-band impedance transformers have been proposed [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

An Exact Synthesis Method for Dual-Band Chebyshev Impedance Transformers

Castaldi¹,

Fiumara²,

Gallina³

2008

PIER

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Abstract-We propose an exact synthesis method which allows the design of dual-band transformers with an arbitrary even number of uniform sections giving equi-ripple impedance matching in two separate bands centered at two arbitrary frequencies. This method is a generalization of the exact Collin-Riblet synthesis of Chebyshev single-band transformers. As compared to a single-band Collin-Riblet transformer encompassing both required passbands, the proposed design yields significantly better performance in terms of passband tolerance and width.

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Design of Novel Dual-Band Bandpass Filter With Microstrip Meander-Loop Resonator and CSRR DGS

Cited by 136 publications

References 17 publications

Rotationally Symmetric Coupled-Lines Bandpass Filter With Two Transmission Zeros

Rotationally Symmetric Coupled-Lines Bandpass Filter With Two Transmission Zeros

An Approach for Multi-Band Bandpass Filter Design Based on Asymmetric Half-Wavelength Resonators

An Exact Synthesis Method for Dual-Band Chebyshev Impedance Transformers

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