Compact CPW-Fed Combline Filter in Substrate Integrated Waveguide Technology

Martínez, J.D.; Sirci, Stefano; Taroncher, M.; Boria, Vicente E.

doi:10.1109/lmwc.2011.2174215

Cited by 75 publications

(70 citation statements)

References 6 publications

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“…3. The resonator can be seen as a TEM-mode combline resonator [3]. The synthesis procedure starts by choosing the slope parameter of the basic cell at the center frequency of the filter.…”

Section: B Filter Synthesismentioning

confidence: 99%

See 1 more Smart Citation

Substrate Integrated Waveguide Diplexer Based on Circular Triplet Combline Filters

Sirci

Martínez

Vague

et al. 2015

IEEE Microw. Wireless Compon. Lett.

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Abstract-The design of substrate integrated waveguide (SIW) diplexers, based on combline triplet sections with transmission zeros (TZs) placed below and above the passband, is presented. In order to control the location of the TZs, positive and negative couplings are conveniently provided. A highly compact implementation based on circular substrate integrated coaxial resonators is proposed. An X-band diplexer with channel center frequencies at 9.5 and 10.5 GHz and absolute bandwidths of 400 MHz is designed. The structure shows important advantages in terms of size reduction, while keeping good insertion losses as well as high rejection and isolation levels.Index Terms-Combline filters, diplexer, substrate integrated waveguide (SIW), transmission zeros (TZs).

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“…3. The resonator can be seen as a TEM-mode combline resonator [3]. The synthesis procedure starts by choosing the slope parameter of the basic cell at the center frequency of the filter.…”

Section: B Filter Synthesismentioning

confidence: 99%

“…Recently, substrate integrated coaxial resonators have been proposed for reducing filter size in SIW technology [3]. In this paper, both positive and negative cross-couplings in a circular triplet section are presented in order to achieve high rejection in compact X-band diplexers with narrow inter-channel separation.…”

mentioning

confidence: 99%

Substrate Integrated Waveguide Diplexer Based on Circular Triplet Combline Filters

Sirci

Martínez

Vague

et al. 2015

IEEE Microw. Wireless Compon. Lett.

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“…The bottom part of the cavity is formed from a printed circuit whose layout is depicted in Fig. 1(c), part of which resembles to the resonators of a substrate integrated waveguide based coplanar waveguide fed combline filter proposed in [10]. In this configuration the filter is fed with a 50 microstrip line that has a length of (from the wall of the box), and is connected to a conducting annular ring whose outer and inner diameters are given by and , respectively.…”

Section: Filter Designmentioning

confidence: 99%

Novel Microstrip Fed Mechanically Tunable Combline Cavity Filter

Kurudere

Ertürk

2013

IEEE Microw. Wireless Compon. Lett.

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Abstract-A novel configuration for mechanically tunable combline bandpass filters is proposed, where the classical resonating rod-tuning screw combination is replaced with a simple printed circuit-tuning screw combination. Moreover, because a printed circuit structure that uses metal vias forms the bottom part of the cavity, the coaxial type feeding and the coaxial to cavity matching of classical combline filters are also replaced with a microstrip feeding. Consequently, the proposed configuration provides smaller size, less weight, integration with other printed circuits and significant simplification in the fabrication process. A prototype filter is designed and fabricated for verification. The measured results are in good agreement with the simulation, and the filter exhibits very good harmonic suppression.

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“…The structure only occupies eighth of the SIW [3]. On the other hand, to reduce the footprint of SIW resonator, folded SIW (FSIW) concept [4,5], defected-ground-structure (DGS) and ring gaps [6,7] have been applied to design SIW filters. A quadruple folded SIW (QFSIW) cavity is introduced to decrease the circuit area of conventional SIW cavity to be 89% [8], but DGS and ring gaps are limited by the geometrical dimensions of the employed loading structures and the area available on the top/bottom walls of the SIW cavity.…”

Section: Introductionmentioning

confidence: 99%

Design of an ultra-miniature substrate integrated waveguide filter

Zhu

Xie

et al. 2017

IEICE Electron. Express

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An ultra-miniature modified quarter mode substrate Integrated waveguide (QMSIW) resonator is proposed. The dominant resonant mode of the proposed resonator is TE 101 mode. The area of the modified QMSIW resonator is reduced by nearly 97.3% compared with the conventional fullmode SIW resonator. With the new coupling structures, the miniaturized resonator can be properly arranged in the filter design to minimize the footprint of the circuit. A novel filter using compact modified QMSIW cavity is designed, the proposed compact filter is fabricated to prove the predicted results in experiment, and good agreement is obtained.

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Compact CPW-Fed Combline Filter in Substrate Integrated Waveguide Technology

Cited by 75 publications

References 6 publications

Substrate Integrated Waveguide Diplexer Based on Circular Triplet Combline Filters

Substrate Integrated Waveguide Diplexer Based on Circular Triplet Combline Filters

Novel Microstrip Fed Mechanically Tunable Combline Cavity Filter

Design of an ultra-miniature substrate integrated waveguide filter

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