Compact Narrowband Filtering Rat-Race Coupler Using Quad-Mode Dielectric Resonator

Xu, Jin-Xu; Zhang, Xiu Yin; Li, Hui‐Yang

doi:10.1109/tmtt.2018.2851562

Cited by 18 publications

(12 citation statements)

References 27 publications

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“…Compared with References , the proposed designs have much higher Q factors and self‐consistent electromagnetic shielding structure which is beneficial to the suppression of mutual interference between circuits. In Reference , the 3‐D dielectric resonator (DR) structure with large vertical height is not suitable to integration with planar circuits as compared to the proposed structures. By using multilayer structures, the circuits in References realize smaller size.…”

Section: Comparisonmentioning

confidence: 99%

“…However, the abovementioned filtering couplers suffer from the Q factor limitation and thus are not suitable for high‐frequency operations. To achieve high Q factor, the dielectric resonator (DR) filtering couplers have been designed for narrowband applications …”

Section: Introductionmentioning

confidence: 99%

“…A compact multilayer dual-mode filter based on the substrate integrated waveguide circular cavity (SICC) is developed in Reference 9. To further reduce size, a single device integrated with different functionalities, such as filtering coupler, [11][12][13][14][15][16][17][18][19][20][21][22] has been attracting increasing attention. It also recommends an effective way to avoid the performance degradation due to a cascade connection of two individual components.…”

Section: Introductionmentioning

confidence: 99%

“…To achieve high Q factor, the dielectric resonator (DR) filtering couplers have been designed for narrowband applications. 16,17 On the other hand, the port of the components should be placed at proper positions to meet the requirement of system topology and interconnect. Recently, the existed couplers have several different types of topologies.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the existed couplers have several different types of topologies. (a) Two ports are placed at one side, and others are placed at the opposite side 11,12,16,21 ; (b) The distance between each two ports is determined by the required electric length 14,15,17,18 ; (c) Ports are mutually orthogonal. 19,20 A filtering rat-race coupler implemented in lowtemperature co-fired ceramic (LTCC) technology is presented in Reference 18.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Compact substrate integrated waveguide rat‐race filtering couplers with arbitrary angular interval between ports

Zhang

Cheng

Yang

et al. 2020

Int J RF Microw Comput Aided Eng

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A new type of compact filtering rat‐race couplers with arbitrary port direction based on different shape substrate integrated waveguide (SIW) cavity are first proposed in this paper. Different shaped SIW resonators can be combined together to achieve better performance and flexible topology. Resonant frequencies of fan‐shaped SIW cavity with various central angles have been derived to construct the resonant cells and obtain different topological structures. Moreover, interdigital capacitor SIW unit loaded on the common wall between cavities is used to achieve negative coupling structure. The detailed analysis and the design method have been introduced to realize a filtering rat‐race coupler based on substrate integrated fan‐shaped cavity (SIFC) and rectangular cavity. In particular, the combination of different shaped resonators can be selected according to the requirement of port angle interval. In order to further verify the method, the other filtering rat‐race coupler is fabricated using four SIFCs to achieve more available port angle intervals. Compared with other filtering couplers, the proposed designs exhibit good filtering responses, high Q factor, amplitude balance, as well as 0° and 180° phase differences. Furthermore, various angular intervals for input/output ports are convenience to meet the requirement of system topology and interconnect.

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Section: Comparisonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Compact substrate integrated waveguide rat‐race filtering couplers with arbitrary angular interval between ports

Zhang

Cheng

Yang

et al. 2020

Int J RF Microw Comput Aided Eng

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Miniaturized filtering rat‐race coupler based on hybrid circular substrate integrated waveguide and coplanar waveguide resonators

Wang

Zong

2021

Int J RF Mic Comp-Aid Eng

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In this paper, an approach to designing filtering rat‐race coupler (FRRC) with hybrid circular substrate integrated waveguide (CSIW) and coplanar waveguide (CPW) resonators is proposed. The FRRC is developed in a single CSIW cavity embedded with four CPW resonators and four feeding ports, featuring miniaturized size. The desired 0° and 180° phase characteristics of the RRC are realized by the inherent in‐phase and out‐of‐phase electromagnetic fields of the dual‐mode CSIW cavity. By properly arranging the sum, difference and other two output ports, the FRRC is exploited to achieve the desired properties of a RRC with bandpass filtering responses. In addition, transmission zeros are generated in the vicinity of the upper stopband. For validation and demonstration, a miniaturized FRRC utilizing hybrid CSIW and CPW resonators is synthesized, fabricated and experimented in a single‐layered process. Comparisons with previously state‐of‐the‐art research, the proposed FRRC prototype indicates the superiorities of miniaturized footprint, high‐quality‐factor, high‐order filtering response and enhanced out‐of‐band rejection.

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Compact filtering magic‐T using a hybrid microstrip‐cavity structure

Fang

et al. 2023

Micro & Optical Tech Letters

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This letter introduces a filtering magic-T based on a hybrid microstrip-cavity structure. TE 011 and TE 101 modes of the cavity are generated by the two perpendicular input microstrip lines to form the filtering responses. Because of the orthogonality of the feeding lines and the two resonant modes, in-and outof-phase output currents and high port isolations are achieved. The measured filtering responses of the two input ports are in good agreement with each other and possess high-frequency selectivity. The isolations of the input and output ports are below 41 and 22 dB, respectively. Moreover, benefiting from the hybrid microstrip-cavity structure, only two cavity resonators are employed, which realizes compact size.

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Compact Narrowband Filtering Rat-Race Coupler Using Quad-Mode Dielectric Resonator

Cited by 18 publications

References 27 publications

Compact substrate integrated waveguide rat‐race filtering couplers with arbitrary angular interval between ports

Compact substrate integrated waveguide rat‐race filtering couplers with arbitrary angular interval between ports

Miniaturized filtering rat‐race coupler based on hybrid circular substrate integrated waveguide and coplanar waveguide resonators

Compact filtering magic‐T using a hybrid microstrip‐cavity structure

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