Novel High-Quality Compact Microstrip Resonator and its Application to Bandpass Filter

Belyaev, B. A.; Сержантов, А. М.; Bal’va, Ya. F.; Leksikov, A.A.

doi:10.1109/lmwc.2015.2451363

Cited by 25 publications

(12 citation statements)

References 13 publications

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“…Previously [26], for a designed and fabricated structure, inside the stopband between the first and second (spurious) passbands, there exist a number of spurious resonances that decrease the suppression level and width of the stopband. The resonances are excited in the fingers, and their number corresponds to the number of fingers in the resonator.…”

Section: Resultsmentioning

confidence: 99%

“…The calculations performed for the cases with number of fingers 3, 4, and higher give an analytical equation for the unloaded Q-factor of the lowest resonance and its frequency [26]:…”

Section: Multiconductor Resonator Theorymentioning

confidence: 99%

“…The results obtained here and in [26] were used in investigating the behavior of the maximum unloaded Q-factor on the width of the resonator. It is a common knowledge that the unloaded Q-factor of a regular microstrip resonator increases with increasing width.…”

Section: Resonator Characteristicsmentioning

confidence: 99%

“…Previously, we have presented an idea of multiconductor resonator and its realizations in multilayer [24] and interdigital microstrip configurations [25,26]. For the 3-layered structure, a filter is compact and has a wide stopband (10.5f 0 ) at the −100 dB level.…”

Section: Introductionmentioning

confidence: 99%

“…For the 3-layered structure, a filter is compact and has a wide stopband (10.5f 0 ) at the −100 dB level. For a microstrip interdigital structure [26], it has at least four times higher unloaded Q-factor than other types of compact microstrip resonators.…”

Section: Introductionmentioning

confidence: 99%

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High-Quality Compact Interdigital Microstrip Resonator and Its Application to Bandpass Filter

Belyaev¹,

Сержантов²,

Bal'va³

et al. 2017

PIER C

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Abstract-A compact microstrip resonator based on the interdigital structure is proposed. The resonator has several times higher unloaded quality factor compared to similar resonators presented previously and can even reach the Q-factor of a regular λ/4 resonator. The size of the resonator can be significantly reduced with a substantial increase in quality factor by incrementing the number of fingers in the interdigital structure. In addition, for each gap between the fingers, there exist an optimal number of fingers that correspond to the maximum Q-factor. An extension of the upper stopband for a bandpass filter designed using the resonator can be achieved by the interconnection of the fingers in each of the comb structures. The simulation results are proven by fabricated resonators and a fourpole bandpass filter. For the central frequency of 2000 MHz and 16.2% fractional bandwidth, the lateral size of the filter is only 11.5 mm × 3.8 mm for alumina substrate (eps = 9.8). The filter has an upper stopband up to 5.8f 0 at the level −40 dB.

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Section: Resultsmentioning

confidence: 99%

“…The calculations performed for the cases with number of fingers 3, 4, and higher give an analytical equation for the unloaded Q-factor of the lowest resonance and its frequency [26]:…”

Section: Multiconductor Resonator Theorymentioning

confidence: 99%

Section: Resonator Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High-Quality Compact Interdigital Microstrip Resonator and Its Application to Bandpass Filter

Belyaev¹,

Сержантов²,

Bal'va³

et al. 2017

PIER C

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Filtennas for wireless application: A review

Mishra

Lalitha

2019

Int J RF Microw Comput Aided Eng

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In recent year, various filtenna circuits have been developed satisfying the objectives and prerequisites of wireless communication. Some of these developed designs are new or some are the improved version of previous works whereas the others are the combination of conventional methods. This article presents the review of filtenna circuits starting from the beginning to the improvements until date. This article starts with brief overview of various filters with their design strategies and ends in its implementation in filtenna designs followed by discussion on several filtenna designs in term of size and overall performances. Among various designs, bandpass, and bandstop filters are extensively used in filtenna realization as it provides a better selectivity in desired band. Various planar filtenna circuits, based on either defected ground structure (DGS) or resonator or SIW filters are reviewed and presented. Besides, planar filtennas, these filters are also integrated to the aperture of horn antennas for the realization of horn filtennas, applicable for high frequency operations. It is observed that SIW based filtennas exhibited narrow impedance bandwidth. This feature can be improved by doubling substrate layer as well as the number of metallic ways. Whereas, resonator based filtennas use resonator based filters along with DGSs to enhance impedance bandwidth as well as minimize mutual coupling and cross‐polar radiation. Apart from single element filtenna, filtenna arrays, and reconfigurable filtennas (including planar and horn reconfigurable filtennas) are presented. This review article may be helpful for beginners working on filtenna circuits and also such a review process is not available in the open literature to the best of author's knowledge.

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Multilayered multiconductor stripline resonator and its application to bandpass filter with wide stopband

Belyaev

Сержантов

Leksikov

et al. 2017

Microw. Opt. Technol. Lett.

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A multilayered, multi‐conductor stripline resonator is proposed. It is shown that increase in the number of conductors leads to increase the unloaded Q‐factor and decrease the resonant frequency, with increasing the effects for thinner dielectric interlayer. Application of the resonator to the bandpass filter enables designing bandpass filters with very wide and deep stopbands. To prove this, a 4‐pole bandpass filter, having central frequency 360 MHz and an overall size of 15.5 × 31.75 × 8.45 mm3, was designed and fabricated.

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Novel High-Quality Compact Microstrip Resonator and its Application to Bandpass Filter

Cited by 25 publications

References 13 publications

High-Quality Compact Interdigital Microstrip Resonator and Its Application to Bandpass Filter

High-Quality Compact Interdigital Microstrip Resonator and Its Application to Bandpass Filter

Filtennas for wireless application: A review

Multilayered multiconductor stripline resonator and its application to bandpass filter with wide stopband

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