Single-Filter Structure With Tunable Operating Frequency in Noncontiguous Bands

Lee, Bo-Young; Nam, Seunggoo; Lee, Tae‐Hak; Ahn, Chang-Soo; Lee, Juseop

doi:10.1109/tcpmt.2016.2623804

Cited by 19 publications

(6 citation statements)

References 20 publications

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“…Compared to [3][4][5][6][7][8][9][10][11][12][13][14][15][16], the proposed filter provides a wider FBW of 8.7%. 2.…”

Section: Fabrication Measurement and Resultsmentioning

confidence: 99%

“…The proposed filter has better insertion loss compared to [3][4][5][6][7][8][9][10][11][12][13], except for [6,15], which has a larger size than the proposed design.…”

mentioning

confidence: 94%

“…The demonstrated apertures engraved on the middle metal layer allowed the vertical coupling of rectangular SIW resonators on multi-layer substrates through magnetic and/or electric coupling. In [15], SIW filter development was demonstrated on and off, with its operational frequency range switchable between the S-band and the X-band. In [16], a bandpass filter with a broad upper stopband and a weaker electric field was created using the fundamental mode of post-loaded substrate-integrated waveguide (SIW) resonators.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bandwidth-Controllable Third-Order Band Pass Filter Using Substrate-Integrated Full- and Semi-Circular Cavities

Pradhan

Koziel

Barik

et al. 2023

Sensors

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The article presents a novel circular substrate-integrated waveguide (SIW) bandpass filter (BPF) with controllable bandwidth. The proposed BPF was configured using two microstrip feed lines, semi-circular SIW cavities, capacitive slots, and inductive vias. The circular cavity was divided into two halves, and the two copies were cascaded. The resulting bisected and cascaded structures were then connected back-to-back. Finally, by introducing two inductive vias to the circular center cavity, a transmission zero was generated. In order to examine the design concept, a coupling matrix was generated. To demonstrate the theory, a third-order BPF was realized, fabricated, and experimentally validated. The BPF prototype features a wide passband of 8.7%, a low insertion loss of 1.1 dB, and a stopband of 1.5 f0 with a rejection level better than 20 dB, which makes it a potential candidate for microwave sensing and communication industries.

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“…Compared to [3][4][5][6][7][8][9][10][11][12][13][14][15][16], the proposed filter provides a wider FBW of 8.7%. 2.…”

Section: Fabrication Measurement and Resultsmentioning

confidence: 99%

“…The proposed filter has better insertion loss compared to [3][4][5][6][7][8][9][10][11][12][13], except for [6,15], which has a larger size than the proposed design.…”

mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bandwidth-Controllable Third-Order Band Pass Filter Using Substrate-Integrated Full- and Semi-Circular Cavities

Pradhan

Koziel

Barik

et al. 2023

Sensors

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show abstract

“…In addition, the amount of changes in the thickness is not identical when the applied voltage moves from low to high level or from low to high level due to the hysteresis effect. Secondly, the frequency tunable substrate integrated waveguide resonator utilizes the tiny ultra-linear actuators, named TULA to tune the resonant frequency [7]. The devised element shown in Figure 12 is comprised of a small piezo disk with a post attached to and the input voltage is applied by using a small driver circuit that can be controlled with commercial software.…”

Section: Piezoelectric Disk-based Elementsmentioning

confidence: 99%

Reconfigurable Filter Design

Lee¹,

Lee²,

Laurin³

et al. 2021

Adaptive Filtering - Recent Advances and Practical Implementation

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This chapter discusses recent development of reconfigurable filters. The technical terminology reconfigurable means that a circuit is designed in a way to have various electrical characteristics comparing with one which has a static feature. For the filter design, the various electrical characteristics can be considered as the filter can tune its operating frequency, bandwidth, and/or have multiple operational modes, that is, bandstop or bandpass modes. Also, recently, the filters that can exhibit an improved impedance matching performance over its stopband have been reported. It provides more options for the filter designers to realize the reconfigurable filters having reflective and/or absorptive frequency response types to satisfy a prior given requirement. In this chapter, recently devised filter designs will be covered and essential frequency tuning elements to realize the reconfigurable characteristic will be introduced as well.

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“…Compared to a bank of fixed filters, a tunable filter promises greater functionality, better channel selectivity, reduced size, and lower weight since the same hardware can be employed at multiple bands [2]- [5]. However, for tuning over an octave frequency by using pin-diodes switches or varactors, the insertion loss of the tunable filter is larger than normal fixed filters.…”

Section: Introductionmentioning

confidence: 99%

A Technique for Tunable Filters with Low Insertion Loss and Narrow Bandwidth

Zhou¹,

Chen²,

Wu³

2018

E3S Web Conf.

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Abstract:A technique for tunable filters with low insertion loss and narrow bandwidth is proposed in the form of comb-line structure. Both resonant capacitor with pin-diodes and resonant inductance in the tunable filter were analyzed and the main source of insertion loss was obtained. A series of filters with same pin-diodes, center frequency, absolute bandwidth and low return loss was simulated. The results showed that, by changing the values of the resonant capacitor and inductance, insertion loss of the filter can be greatly restricted. This technique will allow the design of tunable LC filters with low insertion loss and narrow bandwidth.

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Single-Filter Structure With Tunable Operating Frequency in Noncontiguous Bands

Cited by 19 publications

References 20 publications

Bandwidth-Controllable Third-Order Band Pass Filter Using Substrate-Integrated Full- and Semi-Circular Cavities

Bandwidth-Controllable Third-Order Band Pass Filter Using Substrate-Integrated Full- and Semi-Circular Cavities

Reconfigurable Filter Design

A Technique for Tunable Filters with Low Insertion Loss and Narrow Bandwidth

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