Design and Analysis of a Bandpass Filter Using Dual Composite Right/Left Handed (D-CRLH) Transmission Line Showing Bandwidth Enhancement

Garg, Priyanka; Jain, Priyanka

doi:10.1007/s11277-021-08529-6

Cited by 1 publication

(1 citation statement)

References 21 publications

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“…Compared with a CRLH transmission line, an ideal D-CRLH transmission line has the advantage of an infinitely long left handed band [15], and the proposed work focuses on developing a compact band-pass filter using a D-CRLH transmission line. In [16,17], the concept of D-CRLH transmission line based band-pass filters with relatively wider passbands are proposed. In [18], a D-CRLH transmission line based band-pass filter with multiple notch bands is presented.…”

Section: Introductionmentioning

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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