Design of Compact Six-Channel Diplexer

Chen, Yung-Wei; Wu, Hung Wei; Dai, Zih-Jyun; Su, Yan–Kuin

doi:10.1109/lmwc.2016.2604868

Cited by 13 publications

(11 citation statements)

References 7 publications

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“…Consequently, the proposed multiplexer which exhibits small size, high isolation, multi-band operation, and independent switch function is particularly suitable for applications in future multi-service and multi-band communication systems. [6] 3/3 4 1.47, 1.75, 1.99 >33 no 0.508 [7] 3/3 2 3.2, 3.7, 4.4 >35 no 0.048 [8] 3/3 3 1.47, 2.25, 3 >35 no 0.153 [9] 3/3 3 1, 1.25, 1.5 >30 no 0.065 [10] 4/4 2 2, 2.2, 2.4, 2.6 >30 yes 0.25 [11] 2/4 3 0.6, 0.9, 1.22, 1.58 >55 yes 0.043 [12] 2/4 2 1.5, 2, 2.4, 3.5 >30 no 0.076 [13] 4/4 3 0.9, 1.2, 1.5, 1.8 >40 no 0.055 [14] 4/4 2 2.3, 3.7, 5, 6.1 >40 no 0.16 [15] 4/4 2 1.5, 1.8, 2.1, 2.4 >25 no 0.183 [16] 2/4 2 2.5, 3, 3.5, 4 >30 no 0.091 [17] 2/4 3 0.6, 0.9, 1.22, 1.58 >55 no 0.043 [18] 4/4 2 0.9, 1.2, 1.5, 1.8 >35 yes 0.07 [19] 2 [23] 2/6 2 0.9, 1.2, 1.5, 1.8, 2.1, 2.4 >33 no 0.1 [24] 2/6 2 1.57, 1.8, 2.4, 3.5, 5.2, 5.8 >30 no 0.027 [25] 4/8 2 1, 1.2, 1.4, 1.6, 1.8, 2, 2.3, 2.6 >30 no 0.088 [26] 2/8 2 0.9, 1.2, 1.5, 1.8, 2.1, 2.4, 2.7, 3 >29 no 0.1 L/P, load/passband number; Iso, isolation.…”

Section: Discussionmentioning

confidence: 99%

“…A module with a smaller size and increasing functionality is always required. To satisfy stringent system requirements, there are several techniques available for developing high-performance multiplexers with two channels [1][2][3][4][5], three channels [6][7][8][9], four channels [10][11][12][13][14][15][16][17][18][19][20], six channels [21][22][23][24], and eight channels [25,26]. In [1, 2, 7-9], diplexers and triplexers based on the common resonator technique have been proposed for the size reduction.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, to further widen stopband, dissimilar SIRs with the same fundamental frequency but different harmonic frequencies are employed. In [24], a six-channel diplexer using multipath quarter wavelength SIRs has been proposed. Herein, each coupled resonator can generate triple channels with low loss and high selectivity.…”

Section: Introductionmentioning

confidence: 99%

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Compact microstrip eight‐channel multiplexer with independently switchable passbands

Chen

Tseng

Wang

et al. 2018

IET Microwaves, Antennas & Propagation

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A compact eight‐channel multiplexer with independently switchable passbands has been presented and investigated. The use of the dual‐mode stub‐loaded resonators can lead to significant size reduction for the multiplexer, this is because the required resonator number is reduced. In addition, the multiplexer is designed based on the distributed coupling technique, so that each passband can be designed individually due to the loading effect is small. Moreover, the complicated nine‐port matching network at the input is not required. Besides, since the p‐i‐n diodes are connected to the output resonators for each channel, all passbands of the multiplexer can be independently switched on and off when the diode is in the reverse‐biased and forward‐biased states, respectively. Therefore, the proposed multiplexer can arbitrarily transfer to a single‐band bandpass filter, a diplexer, a triplexer, a quadruplexer, a quinqueplexer, a sexaplexer, a septiplexer, and an octoplexer. For a demonstration, an eight‐channel multiplexer with the second‐order bandpass response have been designed and fabricated with microstrip in printed circuit board. The measured results are in good agreement with the full‐wave simulation results.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compact microstrip eight‐channel multiplexer with independently switchable passbands

Chen

Tseng

Wang

et al. 2018

IET Microwaves, Antennas & Propagation

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“…Therefore, several diplexers, triplexers and multiplexers have been designed using various microstrip structures [1][2][3][4][5][6][7][8][9]. Six-channel diplexers in [1,2], four-channel diplexers in [3,4], two-channel diplexers in [5,6], and eight-channel diplexer in [7] were introduced. In [1], magnetically quarter wavelength coupled step impedance resonators by grounded via hole were used to obtain six passbands at 1.575/1.8/2.4/3.5/5.2/5.8 GHz.…”

Section: Introductionmentioning

confidence: 99%

A six-channel microstrip diplexer for multi-service wireless communication systems

Fouladi

Rezaei

2020

Eng. rev. (Online)

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In this paper, a six-channel microstrip diplexer is designed and fabricated. It operates at 0.75/0.85/1/1.25/1.6/1.8 GHz for multi-service wireless communication systems. It consists of two stub-loaded resonators, which are integrated by coupled lines. The channels are close together, which makes the proposed diplexer suitable for frequency division duplex (FDD) schemes. The proposed structure has a compact size of 0.025 λg2 where λg is the guided wavelength calculated at 0.75 GHz. The other advantages of the introduced multi-channel diplexer are the low insertion losses of 1.62/1.27/0.43/0.53/1.26 and 1 dB, as well as good return losses of 26/26/25/25/21.7 and 22 dB at 0.75/0.85/1/1.25/1.6/1.8 GHz respectively. A good isolation of less than 22 dB is obtained between the channels. In order to design the presented diplexer a designing technique is used which is based on the proposing of an equivalent approximated LC model and calculating the inductors and capacitors. To confirm the simulation results, the introduced diplexer is fabricated and measured.

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“…Such resonators are dual-mode resonators [10][11][12], triple-mode resonators [13] and quadruple-mode resonators [14]. Those filters, which are realized by multi-mode resonators, have the ability to reduce the circuit size and improve the selectivity of bandpass filters, triggering the multi-mode resonators as the common method for achieving compact size diplexers.…”

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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Design of Compact Six-Channel Diplexer

Cited by 13 publications

References 7 publications

Compact microstrip eight‐channel multiplexer with independently switchable passbands

Compact microstrip eight‐channel multiplexer with independently switchable passbands

A six-channel microstrip diplexer for multi-service wireless communication systems

Miniature Triple-Mode Diplexer With Good Selectivity

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