A Compact Design of Circular Ring-Shaped MMR Based Bandpass Filter for UWB Applications

Shome, Partha Pratim; Khan, Taimoor

doi:10.1109/apmc46564.2019.9038392

Cited by 12 publications

(4 citation statements)

References 11 publications

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“…The compensated inductors (𝐿 = 0.2 nH) were generated with the transmission line. The cut-off Table 3 provides a comparison with other UWB techniques [26][27][28]. The previous studies are chosen from the requirements of the Federal Communications Commission.…”

Section: Resultsmentioning

confidence: 99%

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Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines

2021

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An ultra-wideband bandpass filter (UWB-BPF) using inductively compensated parallel-coupled lines (ICPCL) is presented in this article. It consists of three circuits: a high-pass filter (HPF), a lowpass filter (LPF), and a transmission line. The HPF and the LPF are independently synthesized from the ICPCL. The proposed filter can suppress unwanted frequencies in the upper stopband and increase the skirt slope of the frequency response in the transition bands. The fabricated UWB-BPF with compact size provides good passband performances, with insertion loss of better than −0.49 dB and return loss of better than −12 dB in the frequency range of 2.92–10.95 GHz (the bandwidth of 8.03 GHz). The 107% bandwidth is achieved. In addition, the proposed filter can suppress the spurious frequencies at 2f0, which is greater than 30 dB. The measured results accord well with the simulation results. The novelty of the paper is the introduction of the ICPCL for the construction of the compact UWB-BPF.

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Section: Resultsmentioning

confidence: 99%

“…Additionally, various UWB filter design techniques have been proposed to meet the required UWB frequency mask (3.1 to 10.6 GHz) [28]. In [26], the circular ring resonator was applied to the BPF. In [27], the coupled-line resonator was used to design the UWB filter.…”

Section: Resultsmentioning

confidence: 99%

Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines

2021

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“…Stepped impedance stubs enable the construction of two transmission zeros (TZs) and great selectivity. In these publications [9][10][11], filters with this kind of MMR design are also investigated. These MMR-based filters seek to attain ultra-wideband features by using several resonant modes in a resonant structure.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized UWB Bandpass Filter Employing Multi-Stub-Loaded Short-Circuited Stepped Impedance Ring Resonator

Wei,

Wang,

Liu

et al. 2023

ACES Journal

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This article presents a novel microstrip line topology implementation of an ultra-wideband (UWB) bandpass filter. The proposed topology is a short-circuited stepped-impedance ring resonator with an open-circuit stub and a short-circuit stub loaded at the central vertical position of the low impedance of this resonator, respectively. Within the UWB spectrum, five modes are allocated under weak coupling, and to increase filter selectivity, two transmission zeros are added. It is possible to extend the upper stopband and provide sufficient external coupling by utilizing interdigital-coupled lines. To demonstrate the design theory, a prototype is designed and manufactured on a 0.8 mm thick substrate of the affordable F4B-2, and its performance is verified. Measurements show a 3-dB bandwidth span from 2.8 to 9.5 GHz, insertion loss of 0.36 dB, and return loss better than 13 dB.

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“…However, the continuous attention of researchers in this field, whether in the establishment of novel methods or modification of existing techniques, made it possible to enhance the FBW from 40%-70% to greater than 110% in recent days [2]. Researchers have been establishing different methods to design UWB bandpass filters not only for satisfying the filter frequency band and emitted power level restriction but to improve filter fractional bandwidth, insertion loss, return loss parameters, and group delay simultaneously, for instance, application of coupled meandered line [3], generating unit cell from composite right-/left-handed transmission line [4], hybrid structure combining microstrip and coplanar waveguide [5], asymmetric parallel-coupled line [6], multimode resonators (MMR) [7][8][9][10], composite highpass/lowpass filter topology [11], defected ground technology [12], complementary split-ring resonator (CSRR) [13], multilayer aperture coupled patches [14], etc. Employing very short duration (0.1-2 ns) pulses for transmitting information allows UWB filter a large emission bandwidth which in turn guards UWB signal against the interference generated by other licensed pre-existed radio services like WLAN (5.8 GHz), WiMAX (3.5 GHz), and satellite communication (8 GHz).…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Uwb Bandpass Filter With Multi-Notch Characteristics Using Comb Shaped Resonator

Chakraborty¹,

Shome²,

Panda³

et al. 2022

PIER M

Self Cite

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This paper aims to present a highly selective, compact size new ultra-wideband (UWB) bandpass filter with three sharp notches for UWB indoor applications. The fundamental geometry of the filter is based on a modified multi-mode resonator (MMR) structure which comprises an open-ended step impedance resonator (SIR) attached to an interdigitated uniform impedance resonator (UIR). Realizing a Comb-shaped resonator structure below the UIR and symmetrically extending the lower arm edge of the interdigital coupled lines, three notches are generated at 6 GHz, 6.53 GHz, and 8.35 GHz. These notches have improved the UWB bandpass filter responses by suppressing the existing interferences in the UWB passband created by Wi-Fi 6E (6 GHz), super-extended C band (6.425 GHz ∼ 6.725 GHz), X band satellite communications for satellite TV networks or raw satellite feeds (7.25 GHz ∼ 8.395 GHz). Concurrently the notched band filter has achieved superiority in other salient features concerning passband and stopband of the filter such as a high passband fractional bandwidth (115.76%), low return loss (−13.27 dB), low insertion loss (0.44 dB ∼ 0.97 dB), wide upper stopband (5.37 GHz), nearly flat group delay (0.28 ns ∼ 0.45 ns), etc. The ultimate design of the UWB bandpass filter is fabricated and verified by comparing the simulated filter responses with the measured results indicating a good agreement.

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A Compact Design of Circular Ring-Shaped MMR Based Bandpass Filter for UWB Applications

Cited by 12 publications

References 11 publications

Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines

Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines

A Miniaturized UWB Bandpass Filter Employing Multi-Stub-Loaded Short-Circuited Stepped Impedance Ring Resonator

Highly Selective Uwb Bandpass Filter With Multi-Notch Characteristics Using Comb Shaped Resonator

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