A diplexer for UMTS applications

Cabral, H. A.; Bezerra, S. T. G.; Melo, M. T. de

doi:10.1109/imoc.2009.5427595

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…In [13], a microstrip diplexer based on a symmetric structure has been introduced to operate at two quite close channels (2.35/2.59 GHz). In [14], H-type resonators have been utilized to miniaturize a microstrip diplexer, which operates at the UMTS upload and download bands. In this paper, first, two bandpass filters are realized using four microstrip cells and a coupled lines structure.…”

Section: Introductionmentioning

confidence: 99%

Design of a microstrip dual-frequency diplexer using microstrip cells analysis and coupled lines components

Noori

Rezaei

2017

Int. J. Microw. Wireless Technol.

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In this paper, a microstrip diplexer composed of two similar resonators is designed. The proposed resonator is consisting of four microstrip cells, which are connected to a coupled lines structure. In order to select a suitable geometric structure, first, all cells are assumed as undefined structures where there is a lack of basic information about their geometry and dimensions. Then, an equivalent LC circuit of the coupled lines is introduced and analyzed to estimate the general structure of the resonator respect to a requested resonance frequency. The proposed diplexer is designed to operate at 2.36 and 4 GHz for wireless applications. The insertion losses (S21 and S31) are decreased significantly at the resonance frequencies, so that they are 0.2 and 0.4 dB at 2.36 and 4 GHz, respectively. The designed diplexer is fabricated and measured and the measurement results are in a good agreement with the simulations.

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Section: Introductionmentioning

confidence: 99%

Design of a microstrip dual-frequency diplexer using microstrip cells analysis and coupled lines components

Noori

Rezaei

2017

Int. J. Microw. Wireless Technol.

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“…Researchers have proposed several diplexer designs on printed circuit board with low‐cost, small size, and high performance . Different techniques based on utilizing complex open‐loop, coupled‐line, and stepped‐impedance resonators were proposed to reduce the size of diplexers .…”

Section: Introductionmentioning

confidence: 99%

Millimeter-wave microstrip diplexer using elliptical open-loop ring resonators for next generation 5G wireless applications

Haraz

Ashraf

Almorqi

et al. 2015

Microw. Opt. Technol. Lett.

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Design of millimeter‐wave microstrip diplexer using elliptical open‐loop ring resonators (OLRRs) for the next fifth generation (5G) wireless applications, is presented in this article. The proposed design consists of two 14‐GHz and 28‐GHz bandpass filters (BPFs). Each BPF consists of elliptical OLRRs that couple two microstrip lines. The geometrical parameters of both BPFs can easily adjust the passband and stopband frequencies to the desired frequencies. The proposed elliptical‐shaped OLRRs show good broadband characteristics. The longer OLRR is responsible for achieving passband at the lower resonant frequency of 14 GHz while the shorter OLRR is used to generate a 28‐GHz resonant frequency. The proposed diplexer has good return losses and insertion losses at the two resonant frequencies of 14 and 28 GHz. To validate the simulation results, the prototypes of the proposed designs are developed and tested. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:106–110, 2016

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“…In past, many design methods for planar diplexer have been proposed. The most well‐known methods to compact the planar diplexer is using resonators such as double‐loop‐coupled and slow‐wave open‐loop resonators , modified stepped‐impedance resonator , spiral resonator , periodic‐stub resonator , square open loop with stepped‐impedance resonator , stepped impedance coupled‐line resonator , H‐type resonator , and artificial transmission line , microstrip line resonators with loaded elements , have been utilized in diplexer design. In , microstrip diplexer based on conventional complementary split ring and pseudo‐interdigital resonators are also designed to reduce the size of diplexer, but the size is still large.…”

Section: Introductionmentioning

confidence: 99%

Compact wide‐stopband planar diplexer based on rectangular dual spiral resonator

Bukuru

Song

Xue

2014

Micro & Optical Tech Letters

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A Compact wide‐stopband planar diplexer based on rectangular dual spiral resonator (RDSR) is proposed. The proposed diplexer is composed of three parts: (1) two RDSR bandpass filters (BPFs) with right bend open‐circuited stubs coupling feed structure, (2) open‐circuited stub to reduce the second harmonic in upper stopband, and (3) T‐junction configuration to combine two BPFs circuits for one planar diplexer. Based on the structure, the fabricated wide‐stopband planar diplexer prototype with compact dimension is achieved to operate at the WLAN frequencies (i.e., 3.65/5.2 GHz). Both the simulated and measured results indicate that satisfactory impedance matching and high isolation between two channels are achieved. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:174–178, 2015

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A diplexer for UMTS applications

Cited by 6 publications

References 7 publications

Design of a microstrip dual-frequency diplexer using microstrip cells analysis and coupled lines components

Design of a microstrip dual-frequency diplexer using microstrip cells analysis and coupled lines components

Millimeter-wave microstrip diplexer using elliptical open-loop ring resonators for next generation 5G wireless applications

Compact wide‐stopband planar diplexer based on rectangular dual spiral resonator

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