Waveguide Iris Polarizers for Ku-band Satellite Antenna Feeds

Piltyay, Stepan; Bulashenko, Andrew; Demchenko, I. V.

doi:10.21272/jnep.12(5).05024

Cited by 49 publications

(25 citation statements)

References 16 publications

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“…A large number of scientific articles [29][30][31][32][33][34][35][36][37][38][39][40][41], which consider polarizers, contain only the results of computer simulation, the process of which requires a large amount of time. Therefore, there is a need to create a new mathematical method for the analysis of waveguide polarizers based on reactive elements.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Compact Polarizers for Satellite Telecommunication Systems With the Account of Thickness of Irises

Bulashenko

Piltyay

Demchenko

2021

KPI SN

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Background. One of the main problems in modern satellite telecommunication systems is to increase the volume of information transmission with simultaneous preservation of its quality. Key element of such systems is antenna systems with polarization processing, which is carried out using polarizers. Therefore, development of new polarizers and simple techniques for their analysis and optimization are important problems. The most simple, effective, technological and actual for analysis are polarizers based on waveguides with irises. Objective. The purpose of the paper is to create a mathematical model of the polarizer based on a square waveguide with irises, which allows analyzing the influence of polarizer’s design parameters on its electromagnetic characteristics. Methods. A mathematical model of the waveguide polarizer with irises is created by decomposition technique using transfer and scattering wave matrices. To take into account the irises’ thickness their equivalent T- and Π-shaped circuits were used. Results. We have developed mathematical model of the waveguide polarizer with irises, which takes into account their thickness and is based on the complete scattering wave matrix of the waveguide polarizer. The matrix has been obtained using the microwave circuit theory. The main characteristics of the waveguide polarizer were defined using matrix elements. The optimization of characteristics of a polarizer was carried out in the operating Ku-band 10.7–12.8 GHz. Conclusions. Suggested mathematical model of a waveguide polarizer with irises provides the account of heights of irises, distances between them and their thickness. The results obtained show that this model is simpler and faster for the calculation of electromagnetic characteristics compared to finite elements method, which is often used for analysis of microwave devices for various applications.

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Section: Introductionmentioning

confidence: 99%

Simulation of Compact Polarizers for Satellite Telecommunication Systems With the Account of Thickness of Irises

Bulashenko

Piltyay

Demchenko

2021

KPI SN

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“…In turn, the orthomode transducer separates linearly polarised signals and directs them to two highly isolated waveguide channels [8,9]. The modern designs of polarizers are realized in the form of waveguide structures with irises [10,11,12], ridges [13,14,15,16,17], posts [18,19,20,21,22,23,24], thin metal septums [25,26] and slots [27,28]. The waveguide polarizers with posts and irises operate similarly to the post and iris waveguide phase shifters applied in phased array antennas and other systems [29,30,31,32,33,34,35,36].…”

Section: Introductionmentioning

confidence: 99%

“…The 30% operating fractional bandwidth provides a reflection coefficient of −40 dB and a cross-polar discrimination level of −35 dB. In articles [10,11], a polarizer based on a square waveguide with irises for the Ku-frequency band was developed. The square waveguide polarizer with four irises provides VSWR less than 1.24.…”

Section: Introductionmentioning

confidence: 99%

Information Resources Economy in Satellite Systems based on New Microwave Polarizers with Tunable Posts

Piltyay

Bulashenko

Kushnir

et al. 2020

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One of the fundamental problems of modern digital telecommunications is the economy of digital information and frequency resources, which are highly limited. The introduction of novel telecommunication systems and 5G networks requires searching for principal solutions for the economy and reusing the frequency spectrum. Therefore, modern wireless mobile, terrestrial, and satellite systems use various new technologies to increase communication channels' information capacity for the economy of limited frequency resources. One of the most effective ways to reuse the information system's operating frequency band is to apply antennas with polarisation signal processing. Such systems provide the possibility to transmit and to receive simultaneously signals with different types of polarisation. Consequently, the application of electromagnetic waves with two orthogonal polarisations improves wireless systems' information characteristics for various purposes. This allows doubling the information capacity of mobile, terrestrial, and satellite communication channels. Also, polarisation processing is carried out in meteorological and radar systems to receive, transmit, and process information. The essential elements of such systems are microwave polarisers and orthomode transducers. The electromagnetic characteristics of these devices affect the aspects of the whole system significantly. Main electromagnetic factors include phase, matching, and polarisation parameters. The article presents the development of a compact tunable polarizer based on a square waveguide with three posts. The developed polariser operates in the X-band from 8.0 GHz to 8.5 GHz. Created a mathematical model of the polariser is based on the scattering and transmission matrices. To verify the developed theoretical model's correctness, the calculation of all characteristics was also performed numerically using the finite integration technique. The developed compact polariser based on a square waveguide with three posts allows tuning it's matching and polarisation characteristics by changing all posts' heights. The developed polariser's main advantages are small dimensions, tuning options, and aspects of polarisation transformation.

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“…Nowadays, microwave waveguide polarizers 1 are fundamental devices in modern radar 2 and satellite telecommunication antenna systems 3 , which receive and transmit the signals with orthogonal circular polarizations of electromagnetic waves 4 . A polarizer 5 determines the performance of polarizations transformation 6 of waveguide feed network of the antenna system 7 .…”

Section: Introductionmentioning

confidence: 99%

“…29 Sun Q., et al3-D implicit-explicit hybrid finite difference/spectral element/finite element time domain method without a buffer zone. IEEE Trans.…”

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confidence: 99%