Optimum-Iris-Set Concept for Waveguide Polarizers

Virone, G.; Tascone, R.; Peverini, O. A.; Orta, Renato

doi:10.1109/lmwc.2006.890474

Cited by 38 publications

(23 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This specific waveguide or similar ones have been used in the past to implement high performance CW polarizers. 12,16 The horizontal cut may be realized in different shapes, but for simplicity, we chose to analyze a straight cut. Other similar waveguides with optimized performances in the polarizer 16 can be analyzed with the same approach and computational cost.…”

Section: Numerical Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Modes computation in arbitrarily shaped waveguides by a transformation optics approach

Gentili

Giannetti

Khosronejad

et al. 2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

This article applies a new method to analyze modes in empty waveguides having perfectly conducting walls and a rather generic cross-section. The method is based on a coordinate transformation that maps the generic profile of the waveguide cross-section to a circular waveguide (CW) filled with an anisotropic material. Modes in this latter waveguide can be represented as a series over the corresponding free-space CW modes. This representation is particularly useful if used as a modal expansion over the port of a 2.5D or 3D device treated with a transformation optics approach. The method is particularly efficient when the waveguide is "similar" to a CW. Applications are shown to the analysis of some waveguides of arbitrary cross-section with a view on practical applications.

show abstract

Section: Numerical Resultsmentioning

confidence: 99%

“…A final example is shown in Figure 11 and is represented by a CW with a cut. This specific waveguide or similar ones have been used in the past to implement high performance CW polarizers 12,16 . The horizontal cut may be realized in different shapes, but for simplicity, we chose to analyze a straight cut.…”

Section: Numerical Resultsmentioning

confidence: 99%

Modes computation in arbitrarily shaped waveguides by a transformation optics approach

Gentili

Giannetti

Khosronejad

et al. 2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…The circular polarizer for 8.0–8.6 GHz band build with metal posts achieves return loss of 20 dB and axial ratio less than 2.5 dB 2 . A Ka‐band polarizer in circular waveguide with piecewise‐circular‐profile irises is also suggested, 3 showing a simulated return loss better than 55 dB and a phase error of about 0.9 in a 10% fractional bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Analytical modeling and optimization of new Ku‐band tunable square waveguide iris‐post polarizer

Piltyay

Bulashenko

Sushko

et al. 2021

Int J Numerical Modelling

View full text Add to dashboard Cite

A novel design of the polarizer based on a square waveguide with four posts and four irises for Ku‐band 10.7–12.8 GHz is proposed. The main advantage of the developed polarizer design is the option to tune its polarization characteristics by variation of the posts height. The equivalent circuit of the polarizer has been obtained using scattering and transfer matrices technique. Using this model, the polarization and matching characteristics of the suggested polarizer were optimized simultaneously using the trust region method. This method is reliable and robust since it provides good convergence properties. The novelty of this study lies in the use of a new waveguide polarizer structure based on a combination of irises and posts. Posts enable fine‐tuning of the polarizer performance, while irises promote wide operating frequency band. The following simulated characteristics of the optimal polarizer design were obtained: VSWR for the main modes of horizontal and vertical polarization is less than 1.47, the differential phase shift is within 90° ± 2.6°, the axial is less than 0.46 dB, and the XPD is higher than 32 dB in the operating frequency range. A developed polarizer can be applied in antenna feeds for satellite communication and radar systems.

show abstract

“…In addition, waveguide polarizers have become widespread in modern satellite telecommunications systems. Waveguide polarizers are created based on circular [1][2][3][4], square [5][6][7] or coaxial structures [8][9][10][11]. Polarizing devices are created on the basis of inhomogeneities in the waveguide.…”

Section: Introductionmentioning

confidence: 99%

Tunable Polarizers for X-Band Radar and Telecommunication Systems

Bulashenko

Piltyay

Kalinichenko

et al. 2021

KPI SN

View full text Add to dashboard Cite

Background. Nowadays processing of signal polarizations is widely applied in modern information and telecommunication radio engineering systems for different purposes. Commonly polarization processing is carried out in polarization adaptive antenna systems. The essential elements of such systems are transformation devices for polarization processing. They perform the transformation of the types of polarization and separate the different types to isolated channels. The most simple, effective, technological and actual for analysis are polarizers based on square waveguides with irises and posts. Objective. The purpose of this work is to improve the electromagnetic characteristics of an adjustable polarizer by creating a mathematical model of such device. The device must provide optimized polarization and matching characteristics. Methods. The article presents a mathematical model of a waveguide polarizer with irises and posts by the decomposition method using wave transmission and scattering matrices. The developed model takes into account the influence of the polarizer design parameters on its characteristics. Results. The article contains the results of calculations based on the developed mathematical model of the polarizer. In addition, the results of modelling of the device using the finite element method are presented for comparison. For the developed waveguide polarizer we have compared the polarization characteristics and the matching. Conclusions. The created mathematical model allows us to effectively analyse the characteristics when the design parameters change. These parameters include the size of the wall of the square waveguide, the heights of the irises and posts, the distance between them, the thickness of the irises and posts. The developed polarizer is recommended for the application in modern telecommunication and radar systems.

show abstract

Optimum-Iris-Set Concept for Waveguide Polarizers

Cited by 38 publications

References 10 publications

Modes computation in arbitrarily shaped waveguides by a transformation optics approach

Modes computation in arbitrarily shaped waveguides by a transformation optics approach

Analytical modeling and optimization of new Ku‐band tunable square waveguide iris‐post polarizer

Tunable Polarizers for X-Band Radar and Telecommunication Systems

Contact Info

Product

Resources

About