Microstrip lowpass-bandpass diplexer topology

Capstick, Myles

doi:10.1049/el:19991303

Cited by 48 publications

(53 citation statements)

References 1 publication

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“…Moreover, Diplexer is designed should ensure desired isolation between the dual pass bands. The matching circuit design of lowpass-bandpass [1], [2] may be challenge in conventional designs. Coupled line bandpass topology is used.…”

Section: Introductionmentioning

confidence: 99%

Design of RF Diplexer for Mobile Communication

Brinda¹,

Parveen²

2014

IJCA

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In this paper, a matching circuit for RF diplexer for mobile communication is proposed. Most wanted bands in wireless technologies like GSM and DCS is used. Both bands are designed by using stepped impedance resonators with single order and matching between this two are implemented by Yjunction method. Cutoff frequency for GSM and DCS band are 925 MHz and 1795 MHz. Microstrip Technology is proposed because it provides a better insertion loss, better return loss and good isolation between the passbands. The isolation between two operating bands is better than -50 dB. The overall insertion loss obtained in diplexer is -0.4 dB. The overall return loss is less than -20 dB.

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Section: Introductionmentioning

confidence: 99%

Design of RF Diplexer for Mobile Communication

Brinda¹,

Parveen²

2014

IJCA

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“…To achieve high-dynamic range transceiver, a high-isolation and low insertion loss duplexer design is needed [1][2][3][4][5]. Duplexer can be realized in various media, for example microstrip or waveguide [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

The Design Technique for Coaxial Resonator Cavity Duplexer

Li¹,

Liang²,

Li³

et al. 2008

PIER M

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Abstract-A general design technique for the coaxial resonator cavity duplexer is proposed in this paper, based on the design method of the general Chebyshev band-pass filter. We can obtain the coupling matrixes of cross-coupled resonator duplexer by optimization technique, and complete the design of duplexer fast. The proposed duplexer is designed and fabricated with the 1.92-1.98 GHz downlink and 2.11-2.17 GHz uplink frequencies. Across the bandwidth, the measured insertion losses at the both bands are less than 1 dB, while the input and output return losses are well below 20 dB. More than 50 dB isolation performance is obtained from the duplexer. The measured results approximately meet all the conditions of the design targets.

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“…However, waveguides were rarely reported recently for the reasons of their structure bulkiness and manufacturing complexity; meanwhile, the microstrip diplexers drew notice over for their planar structure, light weight, easy fabrication, and compact size. The low-pass and bandpass microstrip filters composed diplexer [3], the microstrip periodic-stub formed circuit for the multiple frequency operation [4], and the one miniaturized by using microstrip loop filters [5] have been reported. Having a similar form to the microstrip line, the diplexer of quasi-lumped elements implemented by suspended stripline was proposed recently [6].…”

Section: Introductionmentioning

confidence: 99%

“…A multiband antenna usually consists of a few radiators to achieve multiple resonance points and each resonance point is tuned by adjusting the length of individual radiator and the coupling between the radiators [1][2][3]. However, it is difficult to independently tune the resonance frequency of the antenna because of the coupling between radiators of the antenna.…”

Section: Introductionmentioning

confidence: 99%