Compact bandpass filters with wide controllable fractional bandwidth

Mondal, Priyanka; Mandal, Mrinal Kanti; Chaktabarty, A.; Sanyal, Subrata

doi:10.1109/lmwc.2006.882401

Cited by 59 publications

(42 citation statements)

References 9 publications

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“…The combination of these two parts form the band-pass filter. The prime structure is mentioned in [6]. In high-pass section, microstrip structure on the top layer is bended in S shape for compactness.…”

Section: Theorymentioning

confidence: 99%

“…HPF section can be modeled by an equivalent circuit as shown in [6]. Increased C g (gap capacitance for HPF section) shifts the RH band towards lower frequency, whereas, increased C c (Coupling capacitance between top and bottom layers) decreases HPF cutoff frequency, and wider LH transmission band is obtained.…”

Section: Theorymentioning

confidence: 99%

“…The discontinuities between characteristic impedances of transmission lines on the top layer are replaced by their π or T equivalent circuits [12]. By moving the two CSRRs shown in [6] and allocate them concentrically to achieve a compact structure such as shown in Fig. 1, the coupling effect between two CSRRs includes both electric and magnetic couplings.…”

Section: Circuit Modelmentioning

confidence: 99%

“…In [5], the parallel coupled microstrip line with ground plane aperture technique was proposed to design a compact multipole BPF having 60% FBW with gradual cutoff. In [6], complementary split ring resonators (CSRRs) are proposed to design compact BPFs having wide FBW variation. Here in this paper, recent configurations are improved using new structures such as defected microstrip structure (DMS) [7][8][9][10] and full and/or half wave ring resonators as transmission zeros to improve reject and spurious response.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Compact Microstrip Bandpass Filter Improved by DMS and Ring Resonator

Oliaei¹,

Tayarani²,

Karami³

2014

PIER Letters

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Abstract-In this paper, complementary split ring resonators (CSRRs) as band-stop elements are used in combination with coupled microstrip lines as high and low pass elements to design and fabricate very compact bandpass filter (BPF) having controllable characteristics. The proposed filter provides several advantages such as compactness (occupying area less than 0.1λ g × 0.1λ g in which λ g is calculated at center frequency of pass band), sharp rejection, suitable insertion loss (IL 3-dB bandwidth of roughly 2 GHz from 0.7 GHz to 2.7 GHz, i.e., more than 115% FBW), good return loss (RL less than −8.5 dB in all of the bandwidth) and low cost. Defected Microstrip and Ring Resonator Structures have been used for eliminating the created spurious pass band in upper frequencies. The simulation results have been done with full-wave softwares, i.e., CST MWS and ANSYS HFSS by time and frequency domain solvers, respectively. Also, the equivalent lossless lumped circuit of total structure has been obtained and simulated by ADS software. These simulated results show good agreements with experimental ones.

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Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Circuit Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compact Microstrip Bandpass Filter Improved by DMS and Ring Resonator

Oliaei¹,

Tayarani²,

Karami³

2014

PIER Letters

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show abstract

“…In applications, the ring resonator has been used to design filters, mixers, oscillators and antennas [1]. Recently, the novel double slot ring resonators, named complementary split-ring resonators (CSRR), were developed for band pass filter [2][3][4][5][6][7][8][9][10][11], band reject filter [12], low pass filter [13] and high pass filter [14] applications. Basically, these filters based on CSRR structure and alternative couplings were used to design the desired filter for applications.…”

Section: Introductionmentioning

confidence: 99%

Complementary Split Ring Resonators With Dual Mesh-Shaped Couplings and Defected Ground Structures for Wide Pass-Band and Stop-Band BPF Design

Liu¹,

Lin²,

Zeng³

2009

PIER Letters

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Abstract-Novel configurations of complementary split ring resonator (CSRR) with dual mesh-shaped couplings and defected ground structures (DGS) are introduced to design the high performance of wide pass-band and stop-band band pass filters (BPF). This paper presents a low insertion loss (−0.82 dB), symmetry and sharper transmission zero level (−51.88 dB), using effective DGS and alternative coupling for CSRR. The filter with center frequency at 1.92 GHz, pass-band from 1.21 GHz to 3.05 GHz (BW = 95.8%) and wider stop-band (extended to 4.2f 0 below −20 dB rejection level) is designed and fabricated. Simulation and measured results including surface current distributions and frequency responses are presented and discussed.

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Signal Interference Technique for Wideband Filter Design

Mondal¹,

Mandal

2014

Wiley Encyclopedia of Electrical and Electronics Engineering

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The signal interference technique is an efficient method for the design of wideband bandpass as well as bandstop filters with sharp rejection characteristics. The signal is filtered by dividing it into two components propagating through two transmission line segments with different electrical lengths and characteristic impedances. Bandpass or bandstop response is obtained by tuning the electrical lengths and/or impedances. Coupled lines also have been used in one or both of the signal paths. As a result, different configurations of the filter are possible and each of them shows interesting features.

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Compact bandpass filters with wide controllable fractional bandwidth

Cited by 59 publications

References 9 publications

Compact Microstrip Bandpass Filter Improved by DMS and Ring Resonator

Compact Microstrip Bandpass Filter Improved by DMS and Ring Resonator

Complementary Split Ring Resonators With Dual Mesh-Shaped Couplings and Defected Ground Structures for Wide Pass-Band and Stop-Band BPF Design

Signal Interference Technique for Wideband Filter Design

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