Compact ultra-wideband bandpass filters using half-wavelength slotline resonators

Song, Kaijun; Pan, Tian-Fu; Yang, Fan; Xue, Quan

doi:10.1049/iet-map.2011.0418

Cited by 17 publications

(16 citation statements)

References 15 publications

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“…The filter is one of key components in the systems [1][2][3][4][5][6]. The dual-mode resonators have good advantages for designing bandpass filters [7][8][9][10][11][12][13][14], such as compact size, high selectivity.…”

Section: Introductionmentioning

confidence: 99%

Compact Dual-Mode Bandpass Filter with Wide Stopband Using Capacitance Loaded Square Meander Loop Resonator

Duan

Song

Fan

et al. 2016

Wireless Pers Commun

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A novel dual-mode bandpass filter with wide stopband using capacitance loaded square meander loop resonator is presented. The resonator can exhibit dispersion effect due to loaded capacitance, which can reduce the size of resonator and suppress harmonic. The disturbed degenerate-mode resonances are used to form the passband while two transmission zeroes are generated on each side of the passband so as to obtain high selectivity. The circuit area of bandpass filter is only 0.14kg 9 0.14kg, where kg is the guided wavelength at the center frequency. The measured result reaches good agreement with simulated result.

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Section: Introductionmentioning

confidence: 99%

Compact Dual-Mode Bandpass Filter with Wide Stopband Using Capacitance Loaded Square Meander Loop Resonator

Duan

Song

Fan

et al. 2016

Wireless Pers Commun

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“…In the same year, two wideband filters using the triple‐mode slotline resonator and the microstrip‐slotline transition were designed with a FBW up to 120% . Further, the modified triple‐mode UWB slotline filters in were designed to obtain good differential‐mode (DM) response. Ultrawide passband in can be constructed with the lower/upper cut‐off edges dominated by the first/third resonant modes.…”

Section: Introductionmentioning

confidence: 99%

“…Further, the modified triple‐mode UWB slotline filters in were designed to obtain good differential‐mode (DM) response. Ultrawide passband in can be constructed with the lower/upper cut‐off edges dominated by the first/third resonant modes.…”

Section: Introductionmentioning

confidence: 99%

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High selectivity and CM suppression wideband balanced BPF

Deng

Zhao

He³

et al. 2014

Micro & Optical Tech Letters

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In this letter, a novel wideband balanced bandpass filter (BPF) with high selectivity and common‐mode (CM) suppression is constructed with slotline resonator. When the intersection points of the microstrip feedline and slotline resonator are close to the midpoint of the slotline resonator, the coupling between the second mode and microstrip feedline can be suppressed. Making use of this feature, the wideband single‐ended filter with wide upper‐stopband performance is designed using the slotline resonators and two quarter‐wavelength microstrip resonators paralleled to the slotline resonator with tapped‐line coupling at their short‐circuited ends. Further, high‐selectivity fifth‐order wideband single‐ended filter and corresponding balanced BPF are designed with parallel coupling structures between two slotline resonators. The fifth‐order wideband balanced filter is designed and fabricated, and good agreement between measurements and simulations is obtained. The measured CM suppressions are better than 54 dB within the whole differential‐mode passband. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2998–3003, 2014

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“…FCC (Federal Communications Commission) for unlicensed use of the 3.1-10.6 GHz frequency spectrum. However, so far most of the wideband and UWB band-pass filters (BPFs) available in the literature are those singleended ones having basic structures such as multi-mode resonators with coupled feed-lines, [1][2][3][4] tightly coupled microstrip lines with/without loaded stubs, [5,6] and cascade of two individual lowpass and highpass filters, [7,8] to name a few. Since balanced circuit structures are increasingly used in modern communication systems due to their good signal-noise compatibility property, wideband and UWB BPFs of the balanced type are gaining more and more researchers' interest nowadays.…”

Section: Introductionmentioning

confidence: 99%

Balanced wideband BPF design using multi-mode slot-line resonator for MB-OFDM applications

Chen

Lee

Hsu

2013

Journal of Electromagnetic Waves and Applications

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This paper presents a new balanced wideband band-pass filter (BPF) that is designed using a multi-mode slot-line resonator (MMSLR) with microstrip feed-lines. To obtain good differential operation and meanwhile reject unwanted common-mode (CM) noises, the balanced BPF is arranged in a symmetric fashion. For differentialmode (DM) operation, by locating the first three resonant modes of the MMSLR in the desired passband and feeding the MMSLR with tightly coupled microstrip feedlines, we obtained a wideband response that meets the requirement of the OFDM group-B bandwidth specification (4.752-6.336 GHz). For CM operation, an opencircuited stub is effectively added to the feeding lines at the output port so that the transmitted CM signals can be attenuated. The measurement agrees well with the simulation. For the designed balanced wideband BPF, the measured minimum DM insertion loss is 0.63 dB in the DM passband, in which the CM suppression is larger than 17.6 dB.

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Compact ultra-wideband bandpass filters using half-wavelength slotline resonators

Cited by 17 publications

References 15 publications

Compact Dual-Mode Bandpass Filter with Wide Stopband Using Capacitance Loaded Square Meander Loop Resonator

Compact Dual-Mode Bandpass Filter with Wide Stopband Using Capacitance Loaded Square Meander Loop Resonator

High selectivity and CM suppression wideband balanced BPF

Balanced wideband BPF design using multi-mode slot-line resonator for MB-OFDM applications

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