Miniaturized Single-Ended and Balanced Dual-Band Diplexers Using Dielectric Resonators

Li, Yuan Chun; Wu, Di‐Si; Xue, Quan; Hu, Bin‐Jie

doi:10.1109/tmtt.2020.3008784

Cited by 20 publications

(7 citation statements)

References 22 publications

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“…However, the above designs offered only single-state function and occupied large circuit sizes. To increase the integration level, several three-state diplexers have been developed in Li and colleagues 10,11,15 and Lin et al 15 For each design, it can be used as three different diplexers according to the user's demand. However, these three designs have no more than 1 transmission zero and thus the isolation is relatively low.…”

Section: Comparisonmentioning

confidence: 99%

“…It can separate input signals into two output signals, and vice versa. To design highperformance diplexers, planar microstrip resonators, [1][2][3][4][5][6] cavity resonators, 7 SISL/SIW resonators, 8,9 dielectric resonators, 10 coaxial filters, 11 and waveguide resonators 12 were usually employed. However, they operate as only one-state diplexer function.…”

Section: Introductionmentioning

confidence: 99%

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A three‐state diplexer design using stub‐loaded resonator pairs

Zhang

Lin

2022

Micro & Optical Tech Letters

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This letter presents a three‐state diplexer design. By employing one port as the input while the other two as the output, the proposed circuit functions as three diplexers operating at different passbands. Owing to the planar stub‐loaded resonator pair, two transmission zeros are generated at passband edges, ensuring sharp frequency selectivity for each filter passband. In addition, an asymmetrical feed scheme is adopted based on the discriminating coupling method, resulting in two other controllable out‐of‐band transmission zeros. These zeros are essential for isolation improvement between the three diplexer operations. For demonstration, the three‐state diplexer is implemented. Compact size and measured isolation of more than 27.6 dB between the three states are obtained.

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Section: Comparisonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A three‐state diplexer design using stub‐loaded resonator pairs

Zhang

Lin

2022

Micro & Optical Tech Letters

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“…In Chen et al, 5 dual-band quasielliptic, and triple-band quasi-elliptic responses have been designed by adding additional coupled resonators to a separate filter. In Chen and colleagues [6][7][8] the multimode cavity is utilized for the realization of a dual-band filter. The multimode technology greatly reduces the volume; however, frequency agility is not realized in these designs.…”

Section: Introductionmentioning

confidence: 99%

Novel tunable dual‐band filter using evanescent‐mode cavity resonators

Lai

Yang

Chi

et al. 2022

Micro & Optical Tech Letters

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In this paper, a dual‐band filter with highly selective channels and independently tunable channels using evanescent‐mode cavity (EVA) is proposed. It consists of four EVA resonators, each of which is topped by a piezoelectric actuator, which is tuned with frequency. Four sets of varactors between two adjacent resonators are used to tune interstage coupling while four sets of varactors are used between ports and resonators for control of the external coupling. By governing resonant frequencies of the EVA resonators and coupling coefficients between adjacent resonators, the independent center frequency tuning ranges of the lower passband and higher passband of the dual‐filter are 2.05–2.55 and 2.35–2.75 GHz, respectively. Simulation and measurement results maintain the good agreement.

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“…In recent years, the structure based on full dual/multi-mode resonator is proposed by replacing the subsequently cascaded single-mode resonators with dual/multi-mode resonators, which makes further miniaturization achieved [13]- [19]. In [15], a quadmode resonator is designed and applied to design compact dual-band diplexer. However, since the probe excites four modes simultaneously, the external quality factors (Q e ) under each mode can't be controlled independently, which makes the design procedure complicated.…”

Section: Introductionmentioning

confidence: 99%

Unbalanced-/Balanced-to-Unbalanced Diplexer Based on Dual-Mode Dielectric Resonator

Chen

2021

IEEE Access

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The design of compact unbalanced-/balanced-to-unbalanced diplexer (U2U/B2U) based on full dual-mode dielectric resonator (DR) is investigated for the first time. The relationships of the external quality factors (Q e ) under the two modes are analyzed. It is found that the Q e of two modes can be controlled independently, which makes the design procedure simple and efficient. Based on the analysis, both of the proposed U2U and B2U diplexer can be easily built by properly adding feeding probes for the DR without increasing the circuit size by altering the location of the feeding probes according to the distribution of the electromagnetic fields. To verify the proposed design concept, the diplexers mentioned above are simulated, implemented and measured. The isolation is achieved by the orthogonality between modes while the low insertion loss is obtained due to the high unloaded quality factor (Q u ) of the dual-mode DR. The measurements are in accordance with the simulated results, showing low loss and good selectivity.INDEX TERMS Miniaturization, dual-mode dielectric resonator (DR), diplexer, design approach, unbalanced-to-unbalanced (U2U), balanced-to-unbalanced (B2U).

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Miniaturized Single-Ended and Balanced Dual-Band Diplexers Using Dielectric Resonators

Cited by 20 publications

References 22 publications

A three‐state diplexer design using stub‐loaded resonator pairs

A three‐state diplexer design using stub‐loaded resonator pairs

Novel tunable dual‐band filter using evanescent‐mode cavity resonators

Unbalanced-/Balanced-to-Unbalanced Diplexer Based on Dual-Mode Dielectric Resonator

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