Multilayer independently controllable dual‐band bandpass filter using dual‐mode slotted‐patch resonator

Chen, J.-X.; Shao, Chuan; Shi, Jin; Bao, Zhihua

doi:10.1049/el.2013.0238

Cited by 14 publications

(13 citation statements)

References 8 publications

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“…To address this, a dual-band dual-mode bandpass filter (BPF) based on a multi-layer structure has previously been designed [6,7]. Dual-band operation can thereby be obtained by separately implementing a resonator on each of the two substrates; this structure is advantageous in that each operating band can be controlled independently.…”

Section: Introductionmentioning

confidence: 99%

A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator

Sung

2020

J Electromagn Eng Sci

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In this paper, a dual-mode bandpass filter that operates in two different bands is proposed. A circular patch with a small circular hole is set as the basic resonator, and, as the circular hole moves, the linewidth of the ring resonator becomes non-uniform. Consequently, the ring resonator is structurally asymmetric and exhibits a dual-mode characteristic. A gap is formed in the middle of the resonator, a pair of inductors and capacitors is applied to the gap, and the proposed dual-mode structure operates as a dual-band filter. The first resonant frequency f1 is determined by the inductor and capacitor values, and the second resonant frequency f2 is determined by the capacitor values. In addition, the frequency ratio (f2/f1) can be adjusted by an appropriate combination of inductor and capacitor values.

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Section: Introductionmentioning

confidence: 99%

A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator

Sung

2020

J Electromagn Eng Sci

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“…Besides, multiple-mode characteristics of patch resonators are studied to design size-reduced dual-band bandpass filters [19], [20]. However, bandwidth and center frequency can hardly be controlled independently The multilayer structure can provide an acceptable approach to realize high-performance bandpass filters, including substrate integrated waveguide filters [21]- [23] and microstrip patch filters [24], [25]. To our best knowledge, there are only a few literatures that report multilayer patch filters [24], [25].…”

Section: Introductionmentioning

confidence: 99%

“…However, bandwidth and center frequency can hardly be controlled independently The multilayer structure can provide an acceptable approach to realize high-performance bandpass filters, including substrate integrated waveguide filters [21]- [23] and microstrip patch filters [24], [25]. To our best knowledge, there are only a few literatures that report multilayer patch filters [24], [25]. Multilayer patch filters with independently controllable dual-band filter can be achieved [24], [25].…”

Section: Introductionmentioning

confidence: 99%

“…To our best knowledge, there are only a few literatures that report multilayer patch filters [24], [25]. Multilayer patch filters with independently controllable dual-band filter can be achieved [24], [25]. Moreover, without literature reports microstrip patch bandpass filter with realization of generalized frequency responses based on one physic structure.…”

Section: Introductionmentioning

confidence: 99%

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Dual-Mode Microstrip Patch Bandpass Filters With Generalized Frequency Responses

et al. 2019

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A basic two-pole bandpass filter based on the dual-mode square patch resonator is presented and analyzed to realize generalized frequency responses in terms of two finite transmission zeros (FTZs). The feeding lines of the dual-mode filter are deviated from the center position of the patch resonator to realize different strength of main coupling paths. And then, a novel four-pole patch bandpass filter based on a multilayer dual-mode structure is proposed and analyzed in detail. The input and output ports are designed on the upper substrate layer. The lower dual-mode patch resonator is coupled to the upper one using four coupling apertures in the middle metal layer. The multilayer dual-mode patch filter can be modeled by a dual-extended doublet scheme with source-load coupling. Generalized frequency responses in terms of four FTZs can be achieved. Several design examples using the proposed multilayer dual-mode patch filter are presented to illustrate the high degree of flexibility of FTZs. To verify the proposed structure, two examples were fabricated and measured. The measured results agree well with simulated ones. INDEX TERMS Bandpass filter (BPF), dual mode, patch, multilayer, generalized frequency responses, flat group delay, dual-extended doublet scheme.

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“…By using superposition technique, two dual-mode resonators were separately designed to exhibit two separate passbands whose position and bandwidths can be individually tuned. While in [8], two identical cross-slotted patch resonators which were placed back-to-back were applied to achieve a dual-band bandpass filter response. The etched slits on the common ground produced two separated coupling path for the two different modes which allowed both center frequencies and coupling coefficients of the two passbands to be controlled independently.…”

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confidence: 99%

Multilayer dual-mode dual-band bandpass filter

Wahab

Khan

Salleh

et al. 2014

2014 Loughborough Antennas and Propagation Conference (LAPC)

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This paper presents a single ring resonator using multilayer technique for dual-band bandpass filter. The resonator is composed of two resonators with each one having a quarter-wavelength coupled-line connected in series to a transmission line. The two resonators are arranged in parallel to form a single ring dual-band bandpass filter topology. The controlling impedance parameters of this ring are Z r for the transmission line and even-and odd-mode characteristic impedances i.e. Z oe and Z oo for the coupled-lines. Observations on the controlling parameters are conducted to investigate the effect of each parameters in terms of bandwidth, matching level and the transmission zeros. For validation, the filter is realized using multilayer technique, designed at 2 GHz on FR-4 microstrip substrate. The results exhibited good isolation between the two passbands with centered transmission zero attenuated above 40 dB while the centered frequencies were found at 1.59 GHz in the first passband and 2.41 GHz in the second passband. The simulated and measured result is presented throughout this paper to validate the concept.

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Multilayer independently controllable dual‐band bandpass filter using dual‐mode slotted‐patch resonator

Cited by 14 publications

References 8 publications

A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator

A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator

Dual-Mode Microstrip Patch Bandpass Filters With Generalized Frequency Responses

Multilayer dual-mode dual-band bandpass filter

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