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A look at field manipulation and antenna design using 3D transformation electromagnetics and 2D surfaceelectromagnetics Review

Peng-fei ZHANG, Yu-kai YAN, Ying LIU, Raj MITTRA

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 3, Pages 351-365 doi: 10.1631/FITEE.1900489

Abstract: metasurfaces, and present laws of the generalized reflection and refraction that are based on 2D surface electromagnetics

Keywords： Field manipulation Transformation optics Antenna design Surface electromagnetics

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Omnidirectional Antenna Diversity System for High-Speed Onboard Communication Article

Yongjian Zhang, Yue Li, Weiquan Zhang, Zhijun Zhang, Zhenghe Feng

Engineering 2022, Volume 11, Issue 4, Pages 72-79 doi: 10.1016/j.eng.2020.10.014

Abstract:

In this article, an omnidirectional dual-polarized antenna with synergetic electromagnetic and aerodynamic properties is propounded for high-speed diversity systems. The propounded antenna comprises a probe-fed cavity for horizontally polarized radiation and a microstrip-fed slot for vertical polarization. Double-layer metasurfaces are properly designed as artificial magnetic conductor boundaries with direct metal-mountable onboard installation and compact sizes. An attached wedge-shaped block is utilized for windage reduction in hydrodynamics. The propounded antenna is fabricated for design verification, and the experimental results agree well with the simulated ones. For vertical polarization, the operating bandwidth is in the range of 2.37–2.55 GHz, and the realized gain variation in the azimuthal radiation pattern is 3.67 decibels (dB). While an impedance bandwidth in the range of 2.45–2.47 GHz and a gain variation of 3.71 dB are also achieved for horizontal polarization. A port isolation more than 33 dB is obtained in a compact volume of 0.247λ₀ × 0.345λ₀ × 0.074λ₀, where λ₀ represents the wavelength in vacuum at the center frequency, wherein the wedge-shaped block is included. The propounded diversity antenna has electromagnetic and aerodynamic merits, and exhibits an excellent potential for high-speed onboard communication.

Keywords： Antenna diversity system Aerodynamics Electromagnetics Omnidirectional radiation High-speed onboard