Circular Waveguide Polarizer for Weather Radars and Satellite Information Systems

Abstract

This research presents the design and main electromagnetic characteristics of the novel compact microwave waveguide polarizer. The developed device's structure is based on a circular waveguide and anti-phase conducting posts located in it. The application of a circular waveguide instead of a square one allowed simple integration of a polarizer with corrugated horn antennas. The obtaining of required phase difference using a postsbased design provides the possibility of fine tuning of the developed circular waveguide polarizer after its manufacturing process. In addition, simultaneous adaptive operation at orthogonal circular and linear polarizations is available in the antenna system including a polarizer with posts. An automatic control of posts height must be applied in a waveguide in order to provide this option. Numerical simulation, optimization, manufacture and measurements of the polarizer's characteristics were carried out in the operating band 7.4-8.5 GHz. Measured characteristics proved that the suggested circular waveguide polarizer provides good matching and polarization performance. Developed circular waveguide polarizer can be integrated in corrugated horn antenna systems and applied in modern weather radars and satellite information systems.

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

“…[1][2][3] For example, in telecommunication radio systems the simultaneous operation at two orthogonal linear polarizations doubles potentially achieved information transmission. 4,5 Moreover, the ability to process wireless signals with orthogonal circular polarizations provides extra benefits in modern radars [6][7][8][9][10] and space communication systems. [11][12][13][14] The advantages include the reduction of amplitude and polarization distortions caused by Faraday effect in the ionosphere and by the multipath propagation in urban environments and mobile systems.…”

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

“…In addition, some publications [49,50] are devoted to the constructions of broadband polarization processing devices. There are also several designs of polarizers for use in radar systems [51], satellite systems [52][53][54] and both of them [55]. In [56] a comparative analysis of waveguide polarizers with diaphragms is performed.…”

Electromagnetic Performance of Waveguide Polarizers with Sizes Obtained by Single-Mode Technique and by Trust Region Optimization

“…The applied antenna system must contain specific types of microwave waveguide devices [8,9] to provide a possibility to operate at circular polarization. Namely, these devices are orthomode duplexers [10][11][12] and waveguide polarization converters [13,14]. One of the common types of waveguide polarization transforming devices is polarizers with conducting metal septum plates.…”