A compact CPW-based dual-band filter using modified complementary split ring resonator

Choudhary, Dilip Kumar; Chaudhary, Raghvendra Kumar

doi:10.1016/j.aeue.2018.03.032

Cited by 32 publications

(24 citation statements)

References 17 publications

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“…The filter design details can be depicted using filter dispersion diagram of filter equivalent circuit based on NRI‐MTM TL . Hence, the dispersion diagram can be extracted using Bloch Floquet theorem as:

\cos ((), β d) = 1 + italicZY

where, β is the propagation phase constant, the variables Z , and Y are introduced to simplify and defined in terms of the lumped elements in Figure as follows:

Z = \frac{Z_{s 1} Z_{s 2}}{Z_{s 1} + Z_{s 2}}, Z_{s 1} = italicjω L_{R} + \frac{1}{italicjω C_{L}}, Z_{s 2} = italicjω L_{p}

Y = Y_{p 1} + Y_{p 2} = ((), 1 / italicjω L_{L}) + ((), italicjω C_{R} + \frac{italicjω C_{s}}{1 - ω^{2} L_{s} C_{s}})

…”

Section: Switchable Reconfigurable Mtm Filtersmentioning

confidence: 99%

“…Modern microwave communication systems require compact filters with low insertion loss and more number of transmission zeros (TZs) . An approach to achieve compact microwave components has been suggested by novel properties of metamaterial (MTM) such as negative refractive index (NRI) or composite right/left handed (CRLH) structure . Filters based on NRI‐MTM offer unusual properties such as NRI, zero propagation constant, and antiparallel phase and group velocities .…”

Section: Introductionmentioning

confidence: 99%

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A compact reconfigurable bandpass/lowpass filter with independent transmission zeros based on generalized NRI metamaterial

Abdalla

Choudhary

Chaudhary

2019

Int J RF Microw Comput Aided Eng

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This article introduces a new design and analysis of a compact reconfigurable bandpass/lowpass filter based on compact negative refractive index metamaterial transmission line. The filter equivalent circuit has been designed as a cascade of three cells of bisected-Π/Π configuration. The reconfigurable function was achieved using inserted switches in ON and OFF modes within the cells. The filter works as bandpass when all switches are in ON condition and for lowpass switch-1 is in OFF and switch-2 in ON condition. The low pass filter has 3-dB cutoff frequency of 3.25 GHz with a selectivity of 170 dB/GHz. The bandpass filter is cantered at 3.65 GHz and has a well-matched pass band with insertion loss of 0.2 dB and wide stop band with two transmission zeros (TZs). The frequency positions of TZs are independently varying with series and shunt loading elements.The filter performance has been validated through circuit model, electromagnetic simulation, and experimental measurements. The electrical size of bandpass filter excluding feed line is 0.22 λ g × 0.20 λ g (12 × 11 mm 2 ) at center frequency of 3.65 GHz and for lowpass filter is 0.19 λ g × 0.18 λ g at cutoff frequency of 3.25 GHz. The filter can be applied in suitable for different wireless applications. K E Y W O R D SECRLH, generalized negative refractive index, reconfigurable filter

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\cos ((), β d) = 1 + italicZY

where, β is the propagation phase constant, the variables Z , and Y are introduced to simplify and defined in terms of the lumped elements in Figure as follows:

Z = \frac{Z_{s 1} Z_{s 2}}{Z_{s 1} + Z_{s 2}}, Z_{s 1} = italicjω L_{R} + \frac{1}{italicjω C_{L}}, Z_{s 2} = italicjω L_{p}

Y = Y_{p 1} + Y_{p 2} = ((), 1 / italicjω L_{L}) + ((), italicjω C_{R} + \frac{italicjω C_{s}}{1 - ω^{2} L_{s} C_{s}})

…”

Section: Switchable Reconfigurable Mtm Filtersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A compact reconfigurable bandpass/lowpass filter with independent transmission zeros based on generalized NRI metamaterial

Abdalla

Choudhary

Chaudhary

2019

Int J RF Microw Comput Aided Eng

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“…An FPD has been designed with the help of a stepped impedance resonator for good in-band isolation [20]. Compactness has been achieved due to a complementary split ring resonator in [21]. A compact wideband filtering power divider has been designed using a CRLH bandpass filter with the unit cell size of λ g /17 at its resonance frequency [22].…”

Section: Introductionmentioning

confidence: 99%

Compact D-CRLH Structure for Filtering Power Divider

Choudhary¹,

Chaudhary²

2020

PIER Letters

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This research work introduces a compact dual composite right/left handed (D-CRLH) unit cell structure for filtering power divider (FPD) application. The D-CRLH unit-cell consists of an interdigital capacitor with two shorted fingers in series. It contains a meander line, a rectangular stub, and a via in shunt, both series and shunt elements provide filtering response as a bandpass filter. This design has been developed on dielectric material of thickness 1.6 mm, usually called as Epoxy glass substrate (FR-4). The transmission line of length λ g /4 of a Wilkinson power divider has been replaced with a D-CRLH unit cell to reduce the size of proposed structure more than 60%. Another advantage of using a D-CRLH structure is the position of resonance frequency independently controlled by series parameter only because of shorted structure. The series chip resistor has been utilized to improve the isolation at resonance in between output ports. It offers miniaturization with electrical footprint area of 0.15λ g × 0.27λ g (11.4 mm × 20.4 mm), here λ g represents the guided wavelength at resonance frequency of 2.5 GHz.

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“…In Reference , by using short‐circuited stubs and multiple coupled poles, transmission zeros based dual‐band BPF was obtained with high selectivity. The coplanar waveguide‐based dual‐band filter has been designed using complementary split ring resonator (CSRR), in which the zeroth‐order resonance frequency was controlled by shunt parameters . A triple‐band BPF has been designed using double periodic composite right‐left handed (CRLH) resonator .…”

Section: Introductionmentioning

confidence: 99%

“…The coplanar waveguide-based dual-band filter has been designed using complementary split ring resonator (CSRR), in which the zeroth-order resonance frequency was controlled by shunt parameters. 3 A triple-band BPF has been designed using double periodic composite right-left handed (CRLH) resonator. 4 The fractional bandwidth of all three bands can be independently varied with respect to their structural parameters.…”

Section: Introductionmentioning

confidence: 99%

Compact metamaterial inspired structure with bandpass characteristics for penta‐band applications using virtual ground concept

Choudhary

Chaudhary

2019

Micro & Optical Tech Letters

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A simple and compact metamaterial inspired filter structure for penta‐band bandpass response with minimum insertion loss is proposed in this article. The designed filter structure consists of an S‐shaped ring and two sets of meander line inductors, which provides series and shunt parallel LC circuit utilizing triangular stubs. Triangular stubs are realized as virtual grounds, which give a series combination of inductance and capacitance. A penta‐band bandpass filter operates at 1.06/1.85/2.37/2.78/3.17 GHz with the corresponding 3‐dB fractional bandwidth of 56.6%, 22.2%, 11.4%, 9.0%, and 11.6%, respectively. The operating frequencies and transmission zeros can be scaled up and down by varying the physical parameters of the designed structure. The size of the filter is 0.16λg × 0.14λg (19 mm × 17 mm) at the center frequency (1.06 GHz) of the first passband. The metamaterial properties have been verified by its extracted refractive index diagram. The filter performance has been validated through electromagnetic simulation and experimental measurements.

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A compact CPW-based dual-band filter using modified complementary split ring resonator

Cited by 32 publications

References 17 publications

A compact reconfigurable bandpass/lowpass filter with independent transmission zeros based on generalized NRI metamaterial

A compact reconfigurable bandpass/lowpass filter with independent transmission zeros based on generalized NRI metamaterial

Compact D-CRLH Structure for Filtering Power Divider

Compact metamaterial inspired structure with bandpass characteristics for penta‐band applications using virtual ground concept

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