Metamaterial Inspired CPW Fed Compact Low-Pass Filter

Mridula, S.; Paul, Binu; Mohanan, Pezholil

doi:10.2528/pierc15032002

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…4. L 1 , L 2 , L 4 , L 5 and C 2 , C 3 , C 8 , C 9 represent the inductance and capacitance of the transmission line section l f 1 and l f 2 [26,27]. C 1 and C 10 represent the parallel plate capacitance formed by the feed l f and the bottom conductor.…”

Section: Lumped Circuit Model Of the Filtermentioning

confidence: 99%

Ultra-Compact Band-Pass Filter at Low Frequency of Operation

Paul¹,

Mridula²

2023

PIER Letters

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An ultra-compact band-pass filter is presented in this paper. The filter is designed to operate in the medical implants communication service (MICS) band ranging from 401 MHz to 406 MHz. The filter is designed on a Rogers RT/duroid substrate with ε r = 2.94 and tan δ = 0.0012. The overall size of the proposed filter is only 30.6 mm × 18.5 mm (0.058λ g × 0.035λ g ), making it suitable for compact, portable devices. An equivalent circuit model is also proposed for the analysis of the filter geometry. From the circuit model, it can be concluded that the filter exhibits the characteristics of a dual-composite right left-handed (D-CRLH) transmission line. This is also confirmed from the dispersion characteristics. The salient features of the proposed filter include ultra-compactness at low operating frequency, harmonic suppression of 3.7 times of the passband frequency, fractional bandwidth of 4.45%, and good roll-off rate of 297.6 dB/GHz in the lower stopband and 116.4 dB/GHz in the upper stopband.

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Section: Lumped Circuit Model Of the Filtermentioning

confidence: 99%

Ultra-Compact Band-Pass Filter at Low Frequency of Operation

Paul¹,

Mridula²

2023

PIER Letters

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“…The inductance and capacitance for each transmission line section are found out by multiplying L pul and C pul with the corresponding length of each section [21].…”

Section: Characteristic Impedance Zmentioning

confidence: 99%

Design of an Ultra Compact Antenna for Low Frequency Applications

Paul¹,

Mridula²,

Pradeep³

et al. 2022

PIER Letters

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An ultra-compact antenna for low frequency application is presented. The resonant frequency band of the proposed antenna is centered at 403.5 MHz, employed for medical implant communication service (MICS) band. The proposed antenna is designed and fabricated on a substrate with ε r = 4.4, tan δ = 0.02, and thickness h = 1.6 mm. The size of the antenna is only 29 mm × 16.5 mm × 1.6 mm, making it very compact for low frequency of operation. The antenna is evolved from a CPW transmission line. During the process of evolution of the proposed antenna, dual-composite right left handed (D-CRLH) behavior is confirmed from the dispersion diagram. The equivalent lumped circuit model for the antenna is also developed, and the D-CRLH behavior is also confirmed from the circuit model.

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“…However, due to space restrictions, the highest achievable relative stopband (RSB) is limited. [2][3][4][5][6] displays a number of lowpass filter geometries, some of which are used in conjunction with other active circuits [7][8][9][10]. The bandpass filter spectrum applied in WiMAX [7] and power divider requirements [10] have been put to use the compact lowpass filter circuits working in the same band.…”

Section: Introductionmentioning

confidence: 99%

Poly-Resonator Lowpass Filter for 26th Order Harmonic Suppression

Nisamol¹,

Abdulla²,

Rekha³

2022

PIER M

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In this brief, an ultra-vast stopband lowpass filter with miniaturized circuit size for 26th harmonic suppression using poly-resonators and an inclined stepped-impedance transmission line (ISTL) is developed. The poly-resonators such as radial stub resonator and resonator modules constitute the significant part of the filter, and the discontinuity in the inclined angle of the ISTL is balanced by 75% chamfering. The coupling with ISTL has influence over the stopband behavior, and the equivalent circuit for the first transmission zero is analysed. The normalised circuit size is reduced to 16.6%, and additional frequency rejection is achieved using resonator modules RM 1 and RM 2 . The relative stopband width of 185.4% is attained with a 3 dB cut-off frequency of 1.51 GHz. L band communication applications having circuit area limitations can make use of the Poly-resonator ISTL filter for achieving high-frequency noise rejection.

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Metamaterial Inspired CPW Fed Compact Low-Pass Filter

Cited by 7 publications

References 12 publications

Ultra-Compact Band-Pass Filter at Low Frequency of Operation

Ultra-Compact Band-Pass Filter at Low Frequency of Operation

Design of an Ultra Compact Antenna for Low Frequency Applications

Poly-Resonator Lowpass Filter for 26th Order Harmonic Suppression

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