Theory of Polarization-Selective Coupling and Its Application to Design of Planar Orthomode Transducers
| Autor: | Ahmed A. Sakr, Walid Dyab, Ke Wu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Coupling
Computer science business.industry 020208 electrical & electronic engineering 020206 networking & telecommunications 02 engineering and technology Dielectric Polarization (waves) law.invention Orthomode transducer Planar Transducer law Dispersion (optics) 0202 electrical engineering electronic engineering information engineering Electronic engineering Wireless Electrical and Electronic Engineering Wideband Dielectric waveguides business Waveguide |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 66:749-762 |
| ISSN: | 1558-2221 0018-926X |
| Popis: | With the rapid and continuous development of new generations of wireless technologies and networks, exploring the underutilized millimeter-wave (mm-wave) band becomes inescapable. Polarization diversity has been an essential factor in the performance and capacity enhancement of various wireless systems including cellular networks. Accordingly, the design and development of dual-polarized antenna feeding structures in the mm-wave band is a must. In this paper, a compact wideband orthomode transducer design in the Ka-band is proposed and explored. The proposed architecture and design are based on a forward mode polarization-selective coupling strategy between two unconventional waveguides. These special waveguides are a combination between two types of guiding structure, namely, nonradiative dielectric waveguide and substrate-integrated waveguide. Polarization-selective coupling can be achieved in these structures due to different mechanisms by which orthogonally oriented modes are guided. Theoretical coupling levels of 0 dB are possible in the designed structure. Analytical analysis and design steps are given in detail. This analysis facilitates a complete control on the single-mode operation for each polarization. This control, besides the structure being planar, represents the main advantages of the proposed structure. Finally, a prototype is implemented and measured where an excellent agreement is achieved with the simulation results. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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