Analysis of waveguide polarizers using equivalent network and finite elements methods

Piltyay, Stepan; Bulashenko, Andrew; Kalinichenko, Ye. I.

doi:10.1080/09205071.2022.2037471

Cited by 5 publications

(5 citation statements)

References 74 publications

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“…Для аналізу хвилевідних структур сучасних приладів обробки поляризації використовують-ся різні аналітичні та чисельні методи. Основні серед них: метод узгодження режимів [27,63], метод часткових областей з прямим узгодженням полів [20,61,70], метод інтегральних рівнянь для магнітного поля [71], метод інтегральних рівнянь [56,69], який враховує особливість поля на ребрах і виключає відносність збіжності рядів у методі часткових областей [4], а також метод узагальнених матриць розсіяння [37].…”

Section: сучасні хвилевідні пристрої для обробки поляризації та їхні ...unclassified

Microwave waveguide polarizer for satellite communication antennas with circular polarization

Piltyay¹,

Bulashenko²,

Polishchuk³

et al. 2022

Kosm. nauka tehnol.

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The volumes of information transmitted in modern satellite telecommunication systems are constantly increasing. Antennas with signal polarization processing, which is performed by polarizers, are the fundamental elements of such systems. Therefore, the development of methods for the analysis of new polarizers is an important problem. From a technological point of view, polarizers based on waveguides with irises are the simplest. Analysis and optimization of electromagnetic characteristics of a polarizer based on a square waveguide with irises are the goals of the presented research. To solve this optimization problem, we have created a new mathematical model, which allows investigating the influence of the design parameters of the polarizer on its electromagnetic characteristics. A mathematical model of the waveguide polarizer with irises was created by the method of decomposition using wave transmission and scattering matrices. Besides, the new mathematical model takes into account the thickness of the irises using their equivalent T- and П-shaped substitution circuits. The general wave scattering matrix is the basis of a new mathematical model of a waveguide polarizer. This matrix was determined using the theory of microwave circuits. The main characteristics of the waveguide polarizer were determined through the elements of this matrix. Here, we perform the optimization of the polarizer characteristics in the Ku-band 10.7–12.8 GHz. The developed new mathematical model of a waveguide polarizer with irises makes it possible to take into account the heights of the irises, distances between them and their thickness. The new mathematical model determines the electromagnetic characteristics of the polarizer in a simpler and faster way compared to the finite integration technique, which is often used for the analysis of microwave devices for various purposes

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Section: сучасні хвилевідні пристрої для обробки поляризації та їхні ...unclassified

Microwave waveguide polarizer for satellite communication antennas with circular polarization

Piltyay¹,

Bulashenko²,

Polishchuk³

et al. 2022

Kosm. nauka tehnol.

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“…Wideband antenna systems with the possibility of simultaneous operation at two orthogonal circular or linear polarizations require application of specific kinds of waveguides (with irises, 22–30 ridges, 31–39 corrugations, 40–44 posts, 45–50 or a longitudinal septum 51,52 ) and microwave devices in the antenna system's structure 53–60 . One of frequently used and compact solutions for the operation at two orthogonal circular polarizations are the integration of a septum‐based polarization converter into a waveguide antenna feed system 61–65 . In this case, a compact and technologically simple design is obtained.…”

Section: Introductionmentioning

confidence: 99%

“…[53][54][55][56][57][58][59][60] One of frequently used and compact solutions for the operation at two orthogonal circular polarizations are the integration of a septum-based polarization converter into a waveguide antenna feed system. [61][62][63][64][65] In this case, a compact and technologically simple design is obtained. Unfortunately, fractional frequency bandwidth of any septum polarizer is limited by the values of only 15%-20%, which was demonstrated in Reference 66.…”

Section: Introductionmentioning

confidence: 99%

Computer‐aided development and experimental investigation of a double‐ridged orthomode transducer for modern satellite and space communication systems

Piltyay

2022

Int J RF Mic Comp-Aid Eng

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This article presents results of development, optimization, and experimental measurements of electromagnetic characteristics of a wideband orthomode transducer for satellite and space communications. Analyzed design of the transducer is based on a double‐ridged waveguide junction, which allows to obtain high level of discrimination of fundamental electromagnetic modes with perpendicular linear polarizations. Numerical modeling of the designed microwave waveguide orthomode transducer was performed by an effective finite elements method in the frequency domain. Optimization of the structure elements allowed to obtain high quality of matching and to improve the isolation between orthogonal polarizations simultaneously. To optimize the electromagnetic performance of the developed orthomode transducer a trust region method, which previously demonstrated its effectiveness for the improvement of electromagnetic characteristics of waveguide polarization converters, was applied. Experimental measurements of all scattering parameters of an antenna feed system, which included a designed orthomode transducer and a corrugated horn, were performed for the verification of simulated results. Results of computer‐aided modeling and of measurements are in agreement. Measured good matching and high level of isolation between orthogonal polarizations confirm effective electromagnetic performance of the developed orthomode transducer. Designed wideband waveguide device can be applied in modern microwave antenna systems operating simultaneously at two linear or circular polarizations of electromagnetic waves.

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“…Alternative variants of polarizers are the designs with reactive elements in the form of diaphragms [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29], pins [30][31][32][33], and their combinations [34,35]. The reasons are the wider bandwidth and better electromagnetic performance of such devices.…”

Section: Introductionmentioning

confidence: 99%

“…It provides a crosspolarization isolation of no more than 26 dB. The article [28] proposed a method for analyzing waveguide polarizers with diaphragms based on equivalent microwave circuits.…”

Section: Introductionmentioning

confidence: 99%

Accuracy and Agreement of FDTD, FEM and Wave Matrix Methods for the Electromagnetic Simulation of Waveguide Polarizers

Bulashenko

Piltyay

Polishchuk

et al. 2022

AEM

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Waveguide devices of polarization processing are key elements of modern dual-polarized antenna systems. Such antenna systems carry out polarization transformation and separation of signals with orthogonal polarizations in satellite communications and radar appliances. Well-known electrodynamic methods are used to simulate performance of such devices. This paper investigates the accuracy and mutual matching of wave matrix method with FDTD and FEM. The wave matrix method is based on the theory of scattering and transmission matrices. The main electromagnetic characteristics of a polarizer were obtained through the elements of these matrices. The main characteristics of a polarizer were compared. They include phase difference of orthogonal polarizations, level of voltage standing wave, ellipticity coefficient and level of cross-polarization isolation. Comparison of electromagnetic characteristics was carried out at the example of a waveguide iris polarizer for the operating frequency range from 13.0 to 14.4 GHz. In addition, the process of optimization of electromagnetic characteristics was carried out by changing the geometric dimensions of a polarizer. Calculated by different theoretical methods characteristics were compared and analyzed. Results, which were obtained by considered methods, are in good agreement

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Analysis of waveguide polarizers using equivalent network and finite elements methods

Cited by 5 publications

References 74 publications

Microwave waveguide polarizer for satellite communication antennas with circular polarization

Microwave waveguide polarizer for satellite communication antennas with circular polarization

Computer‐aided development and experimental investigation of a double‐ridged orthomode transducer for modern satellite and space communication systems

Accuracy and Agreement of FDTD, FEM and Wave Matrix Methods for the Electromagnetic Simulation of Waveguide Polarizers

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