Design of Compact Quadruplexer Based on Defected Stepped Impedance Resonators

Chen, Jian Zhong; Wang, Nan; Deng, Kun; Yang, and Shuai

doi:10.2528/pier11061301

Cited by 9 publications

(7 citation statements)

References 24 publications

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“…It provides good bandgap and slow-wave effects by slotting on the ground such as PBG and is applied to low pass filters and bandpass filters [33]- [35] without taking up extra space. Reference [36] presents a defective step impedance resonator and is used to design a compact quadruplexer. The relative position of the separated coupling feedline is reasonably placed, and the influence of the adjacent channel is weakened.…”

Section: Introductionmentioning

confidence: 99%

Compact High-Isolation Multiplexer With Wide Stopband Using Spiral Defected Ground Resonator

et al. 2019

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In this paper, the compact wide-stopband diplexer/triplexer is presented. The spiral defected ground resonator (SDGR) is analyzed by using the equivalent model. Based on the symmetry of the SDGR, a diplexer and a triplexer are implemented with a miniaturized size and a wide stopband. Each filter of the channels in the diplexer or triplexer can be independently controlled and exhibits a constant fractional bandwidth. To validate the design concept, the diplexer and the triplexer are designed, fabricated, and measured. The isolation between the channels is greater than 30 dB, and the measured out-of-band suppression is greater than 10 dB in the very wide frequency range. The measured results agree well with the simulation ones.INDEX TERMS Diplexer, triplexer, spiral defected ground resonator (SDGR), compact, wide stopband.

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Section: Introductionmentioning

confidence: 99%

Compact High-Isolation Multiplexer With Wide Stopband Using Spiral Defected Ground Resonator

et al. 2019

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“…In turn, higher order mode of the filters is required to provide sharp passband skirts; however, this will lead to the whole larger dimension. In [8,9], the defected ground structures are utilized to design diplexers. Conversely, this method is not appropriate since they always have top and bottom circuits, which is an inflexible and complicated circuit.…”

Section: Introductionmentioning

confidence: 99%

“…The most common approach to realize a diplexer is using two bandpass filters with parallel/cross coupling of single-mode resonators. The notable resonators are open loop resonators, hairpin line resonators, stepped impedance resonators, quarter-wavelength resonators, and hybrid resonators respectively [4][5][6][7][8][9]. Using such resonators, each of the passbands is designed at its fundamental frequency.…”

Section: Introductionmentioning

confidence: 99%

Miniature Triple-Mode Diplexer With Good Selectivity

Tantiviwat¹,

Razalli²,

Ibrahim³

2017

PIER Letters

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Abstract-This paper presents a compact diplexer with high selectivity. The proposed diplexer employs two sets of triple-mode bandpass filters. Using this approach, the pair of even-mode resonant frequencies can be flexibly controlled by adjusting the characteristic impedance or electrical lengths of the two open-circuited stubs while the odd-mode resonant frequency remains at the fundamental resonant frequency. For a demonstration, a diplexer with two passbands centred at 1.50 and 1.70 GHz and the transmission zeros are created close to the passband edges which extremely improve the skirt selectivity. As a result, the proposed diplexer occupies an extremely small area, i.e., approximately 0.30λ g × 0.35λ g . The measured results are in good agreement with the simulated predictions.

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“…To this end, various design approaches have been proposed [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, due to the limited coupling area available, this type of multiplexers only allows a small number of passbands to be implemented. Additionally, numerous techniques were proposed to design microstrip multiplexers [14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

A Compact Microstrip Quadruplexer Using Slotline Stepped Impedance Stub Loaded Resonators

Li¹,

Zhang²,

Su³

et al. 2013

PIER

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Abstract-In this paper, a novel compact quadruplexer is implemented by using slotline stepped impedance stub loaded resonators (SISLRs) in ground plane. Four folded dual-mode slotline SISLRs with one input and four output coupled line structures are designed at different frequencies for the quadruplexer operation. By properly adjusting the geometrical parameters of a single dual-mode slotline SISLR, its first two resonant frequencies can be controlled, and thus it can be utilized to implement a second-order bandpass filter when these resonant frequencies are suitably assigned. Furthermore, because the proposed quadruplexer utilizes the distributed coupling technique, a small circuit size can be obtained. As a result, the proposed quadruplexer occupies an extremely small area, i.e., 0.22λ 0 ×0.25λ 0 (0.36λ g ×0.41λ g ). Finally, good agreement between measurement and EM simulation verifies the design method successfully.

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Design of Compact Quadruplexer Based on Defected Stepped Impedance Resonators

Cited by 9 publications

References 24 publications

Compact High-Isolation Multiplexer With Wide Stopband Using Spiral Defected Ground Resonator

Compact High-Isolation Multiplexer With Wide Stopband Using Spiral Defected Ground Resonator

Miniature Triple-Mode Diplexer With Good Selectivity

A Compact Microstrip Quadruplexer Using Slotline Stepped Impedance Stub Loaded Resonators

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