A Dual-Mode Dual-Band Filter Constructed on Gaas Substrate for Unlicensed 60- and 77-GHz Applications

Yang, Chin‐Ping; Shu, Shin-Yi; Chiang, Ming-Chou; Chiu, Hsien‐Chin; Chiang, Yuan‐Cheng

doi:10.1163/156939310793675781

Cited by 5 publications

(6 citation statements)

References 28 publications

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“…Besides, dual‐mode resonators are mostly used in multiband bandpass filter design. One of the most popular design methods is to combine dual‐mode resonators having different electrical lengths under appropriate coupling .…”

Section: Introductionmentioning

confidence: 99%

“…Although there are many even–odd mode impedance formulas for various dual‐mode resonators, impedance formulas of a conventional dual‐mode ring resonator are expressed in . Conversely, using the same impedance formulas, calculations of perturbation capacitance and gap capacitance between the feedline and the resonator are also given in . In this study, dual‐band filter design has been achieved using two stacked ring resonators as in .…”

Section: Introductionmentioning

confidence: 99%

“…Conversely, using the same impedance formulas, calculations of perturbation capacitance and gap capacitance between the feedline and the resonator are also given in . In this study, dual‐band filter design has been achieved using two stacked ring resonators as in . However, these studies do not include the frequency response for dual‐band characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Even–odd mode analysis for multiband bandpass filters having multiple resonators and its microstrip implementations

Karpuz

Görür

2014

Micro & Optical Tech Letters

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This article presents even–odd mode impedance/admittance descriptions for dual‐mode multiband filters having independently controllable passbands formed by multiple resonators in different electrical lengths. Even–odd mode impedance models of dual‐mode ring resonators are used. Using these models, conventional equivalent admittance formulas are revised with a frequency dependent separation coefficient to obtain the desired in‐band return loss levels by keeping each passband from the effects of other passbands. As the proposed method can be applied for dual‐mode multiband filters, a dual‐mode dual‐band microstrip filter is designed, simulated, and fabricated. Designed filter has two dual‐mode resonators in different electrical lengths which are comprised by square loop resonators having narrow slits. Fabricated dual‐band filter has also been measured in a good agreement with the simulated results. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2664–2667, 2014

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Even–odd mode analysis for multiband bandpass filters having multiple resonators and its microstrip implementations

Karpuz

Görür

2014

Micro & Optical Tech Letters

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“…Consequently, many dual-band or tri-band filters realized with different structures have been investigating [1]- [14]. Apart from the multi-band filters manufactured on planar circuit board (PCB), some multi-band chip filters fabricated by using MMIC technology have been also developed [15]- [16]. In these published papers, the dualband dual-mode filters comprise either one ring resonator with modified shape or two stacked ring resonators with individual perturbations and feeding features.…”

Section: Introductionmentioning

confidence: 99%

“…However, the dual-band filter constructed with stacked ring resonators that makes of PCB technology needs some special feeding structures, such as enhanced CPW broadside coupling or backside coupling, to properly connect the two stacked ring resonators. To integrate all components into a single chip; however, operation frequencies of the dual-band dual-mode ring filter are also extended to 60-and 77-GHz bands with appropriate MIM feeding configuration [16].…”

Section: Introductionmentioning

confidence: 99%

Design of a MMIC tri-band filter for 60-/77-/100-GHz applications

Yang

Chiang

Chiu

et al. 2011

2011 IEEE MTT-S International Microwave Symposium

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A tri-band dual-mode chip filter, which is fabricated in a commercial pHEMT GaAs technology and suitable for millimeter-wave applications, is presented in this paper. This filter is constructed by using stacked ring resonators with individual perturbations and feeding capacitors; thus, fractional bandwidths and center frequencies of three pass bands can be flexibly controlled. A model of the tri-band filter that considers coupling effects between stacked ring resonators is first proposed, and then a synthesis method that can determine values of all elements of a typical dual-mode ring filter based on specifications of required characteristics is also described. According to the proposed design method, filter designers can quickly determine the layout pattern of the tri-band dual-mode filter which employs proper metal-insulatormetal (MIM) capacitors to obtain the desired filter performance. To verify the proposed design concept, an experimental prototype, locating three pass bands at 60 GHz, 77 GHz and 100 GHz, respectively, was fabricated on GaAs substrate. The size of the filter is about 0.46×0.91 mm 2 and the measured insertion losses in the three passbands are less than 2.4 dB, 2.7 dB and 3.5 dB. The associated return losses are greater 18 dB, 17 dB and 8 dB over the frequency bands of interest.Index Terms -Tri-band filter, dual-mode filter, MMIC, chip filter.

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