Compact D-CRLH resonator for low-pass filter with wide rejection band, high roll-off, and transmission zeros

Choudhary, Dilip Kumar; Abdalla, Mahmoud A.; Chaudhary, Raghvendra Kumar

doi:10.1017/s175907871800140x

Cited by 17 publications

(21 citation statements)

References 22 publications

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“…L L1 = 66 nH, L L2 = 29 nH, C R = 0.56 pF, and C s = 0.03 pF. The structural layout is calculated using the following deign formulas for distributed elements [4,25]. The optimized structural parameters are L = 7.4, Lidc = 6.0, W idc = 0.4, sidc = 0.4, gidc = W s = 0.4, Ls = 7.4, d = 0.7, W stub = 2.0, and Lstub = 6.0 (all dimensions are in mm).…”

Section: Pfmentioning

confidence: 99%

“…The dual composite right/left handed (D-CRLH) resonator structure contains parallel combination of an inductor and a capacitor in series and series combination of a capacitor and an inductor in shunt LC tank circuit and shunt series LC circuit, whereas CRLH unit cell uses series combination of an inductor and a capacitor in series and parallel combination of a capacitor and an inductor in shunt [4]. The D-CRLH unit cell displays left-handed behavior of metamaterial at higher frequency and right-handed behavior at lower frequency, opposite to CRLH structure [5].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Pfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compact D-CRLH Structure for Filtering Power Divider

Choudhary¹,

Chaudhary²

2020

PIER Letters

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“…To clarify the compactness of the UWB CRLH filter, other CRLH filters characteristics are compared with the proposed one. Many CRLH cells are used for UWB filtering applications 21‐26 . Some of these works are only CRLH based design as in 23‐25 .…”

Section: Filter Design Stepsmentioning

confidence: 99%

“…CRLH transmission line has a negative refractive index and hence it has unusual properties that lead to ultra‐size reduction and wideband functionality of microwave components 19,20 . One of the most common applications of CRLH TL is compact low pass filter (LPF) and BPF 21‐24 and mainly ultra‐wideband BPFs 25‐29 . In addition, the Epsilon negative (EN) structure can demonstrate a bandstop property due to its achieved imaginary propagation constant 30,31 .…”

Section: Introductionmentioning

confidence: 99%

Novel configuration of ultra‐wide band uni‐planar configuration of complementary split ring resonator composite right/left‐handed based band pass filter with sharp roll off and good stopband attenuation

Abdalla

Aziz

Arafa

2020

Int J RF Microw Comput Aided Eng

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In this paper, a compact novel simple design of ultra-wide bandpass filter with high out of band attenuation is presented. The filter configuration is based on combining an ultra-wide band composite right/left-handed (CRLH) band pass filter (BPF) with simple uni-planar configuration of complementary split ring resonator (UP-CSRR). By integrating two UP-CSRR cells, the ultra-wideband CRLH filter roll-off and wide stopband attenuation are enhanced. The filter has 3 dB cutoff frequencies at 3.1 GHz and 10.6 GHz with insertion loss equals 0.7 dB in average and minimum and maximum values of 0.48 dB and 1.05 dB, respectively over the filter passband. Within the passband. The transition band attenuation from 3 dB to 20 dB is achieved within the frequency band 1.9 GHz to 3.1 GHz (48%) at lower cutoff and the frequency band 10.6 GHz to 11.4 GHz (7%) at upper stopband. Moreover, the filter has a wide stopband attenuation >20 dB in frequencies 11 GHz to 13.6 GHz (21%) and ends with 3 dB cutoff frequency at 14.8 GHz. Furthermore, the designed filter size is very compact (23 × 12 mm 2) whose length is only about 0.17 λ g at 6.85 GHz. The filter performance is examined using circuit modeling, full-wave simulations, and experimental measurements with good matching between all of them.

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“…Since artificial planar metamaterials transmission lines have proven novel properties in electromagnetic components community research, they have also been used to introduce wideband and compact filters [20][21][22][23][24][25][26][27][28][29]. Therefore, ultra-compact filter design based on these lines has become a very competitive design approach.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Compact and Excellent Out of Band Rejection E-CRLH Inspired Bandpass Filter

Abdalla¹,

Choudhary²,

Chaudhary³

2020

PIER M

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This paper introduces the design and analysis of a compact bandpass with sharp attenuation. The filter topology employs three different cells of a bisected-Π/Π configuration of a negative refractive index metamaterial transmission line. The filter centre frequency is 3.65 GHz, and its 3 dB cutoff frequencies are 2.55 GHz and 4.6 GHz (57% fractional bandwidth). The filter attenuation increases to 20 dB in only 100 MHz (at 4.7 GHz). Moreover, the filter has only 0.2 dB insertion loss within the passband. The filter stopband is characterized with typical flat with 0.2 dB return loss within the stopband (4.7 GHz-5.75 GHz) and very close to 20 dB insertion loss. Moreover, the filter has two frequency independent designed transmission zeros within this stopband. Along with previous specifications, the filter size is only 0.22λ g × 0.20λ g (12 × 11 mm 2) at centre frequency. The filter performance has been validated through circuit model, electromagnetic simulation, and experimental measurements.

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Compact D-CRLH resonator for low-pass filter with wide rejection band, high roll-off, and transmission zeros

Cited by 17 publications

References 22 publications

Compact D-CRLH Structure for Filtering Power Divider

Compact D-CRLH Structure for Filtering Power Divider

Novel configuration of ultra‐wide band uni‐planar configuration of complementary split ring resonator composite right/left‐handed based band pass filter with sharp roll off and good stopband attenuation

Design and Analysis of a Compact and Excellent Out of Band Rejection E-CRLH Inspired Bandpass Filter

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