Octave bandwidth hybrid-coupled microstrip diplexer for a broadband radio astronomy receiver

Villa, Enrique; Aja, B.; Artal, E.; Fuente, Luisa de la

doi:10.1063/1.5031885

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…It is validated that the proposed diplexer has the advantages of wide bandwidth and high isolation. Moreover, it is more compact than the diplexer proposed in Reference 18 with the same approximate bandwidth. However, it suffers from larger insertion loss.…”

Section: Diplexer Design In the Frequency Band Of 6–9 And 12‐16 Ghzmentioning

confidence: 99%

Design of a broadband diplexer based on substrate integrated plasmonic waveguide

Soleimani

Mirhadi

Komjani

2021

Int J RF Microw Comput Aided Eng

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In this article, a new wideband diplexer for microwave frequencies is proposed. This diplexer is designed based on the combination of spoof surface plasmon polariton structures with substrate integrated waveguide (SIW) structures. In the proposed diplexer, bandpass filters were designed within a frequency range of 6–9.2 GHz (bandwidth of 40%) and 11.7–16.2 Hz (bandwidth of 29%) by creating rectangular grooves on the top and bottom of the metallic layers of the SIW. These grooves generate surface plasmon waves in the SIW structure that limit the dispersion curve to an asymptotic frequency and cause a high cut‐off frequency. The low cut‐off frequency of the filters is determined by the SIW dimensions. Moreover, the two filters were fed using a microstrip T‐junction with stepped impedance transformation. By optimizing the feed lines, the electromagnetic waves in each working band are directed to the filter of that band, and finally, the filters create a proper attenuation outside the band. A sample of the diplexer is fabricated and tested to verify the design. The simulation results are in good agreement with the experimental results. This diplexer can be a good candidate in microwave frequencies for telecommunication systems.

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Section: Diplexer Design In the Frequency Band Of 6–9 And 12‐16 Ghzmentioning

confidence: 99%

Design of a broadband diplexer based on substrate integrated plasmonic waveguide

Soleimani

Mirhadi

Komjani

2021

Int J RF Microw Comput Aided Eng

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“…The concept of the diplexer is based on a balanced configuration using hybrid couplers in the main circuit branch and high selective bandpass filters to confine both output bands based on Ref. 36. The combination of two 90 deg hybrid couplers with two identical bandpass filters of one band, which are placed in between, is used to extract the upper-frequency band.…”

Section: Diplexermentioning

confidence: 99%

10- to 19.5-GHz microwave receiver of an electro-optical interferometer for radio astronomy

Aja

Fuente

Artal

et al. 2019

J. Astron. Telesc. Instrum. Syst.

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This document describes the analysis, design, and prototype test results of the microwave section of a 10-to 19.5-GHz interferometer, aimed at obtaining polarization data of cosmic microwave background (CMB) radiation from the sky. First, receiver analysis is thoroughly assessed to study the contribution of each subsystem when obtaining the Stokes parameters of an input signal. Then, the receiver design is detailed starting from the front-end module, which works at cryogenic temperature, composed of a set of passive components: feedhorn, orthomode transducer, and polarizer, together with active components, such as very low-noise amplifiers. The back-end module (BEM) is directly connected, working at room temperature for further amplification, phase switching, and correlation of the signals. Moreover, the whole frequency band is split into two sub-bands (10 to 14 GHz and 16 to 20 GHz) using a high selective diplexer in the BEM in order to reject radiofrequency interferences. Phase switches allow phase difference steps of 5.625 deg, which modulate the correlated outputs to reduce systematic effects in the postdetection signal processing. Finally, measurements of all the subsystems comprising the microwave section of the receiver as well as the characterization of the complete microwave receiver are presented. The obtained results demonstrate successful performance of the microwave receiver that, together with an electro-optical correlator and a near-infrared camera, comprises the interferometer. Moreover, synthesized images corresponding to combinations of the Stokes parameters can be obtained with the whole system.

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Octave bandwidth hybrid-coupled microstrip diplexer for a broadband radio astronomy receiver

Cited by 2 publications

References 14 publications

Design of a broadband diplexer based on substrate integrated plasmonic waveguide

Design of a broadband diplexer based on substrate integrated plasmonic waveguide

10- to 19.5-GHz microwave receiver of an electro-optical interferometer for radio astronomy

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