Broadband Dual Polarized Antenna Arrays for Mobile Communication Applications

Balling, Stefan; Hein, Matthias; Hennhofer, M.; Sommerkorn, Gerd; Stephan, Ralf; Thomä, Reiner S.

doi:10.1109/euma.2003.341114

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…It only remains to show that the smallness of the near-field interactions is achievable for our MS, is compatible with the required tunability of the reflection phase and allows the application of the RL for a PNUMS. Systems of equations (5,6) of [48] relating the collective and individual polarizabilities are recursive, whereas explicit formulas (42)(43)(44) of [66] are involved. Therefore, here we only present the result of their analysis -conditions on which the contributions of the real parts of interaction factors into collective polarizabilities can be neglected:…”

Section: Relations Of the Angular Stability Property With Response Lo...mentioning

confidence: 99%

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Angular and Polarization Stability of Broadband Reconfigurable Intelligent Surfaces of Binary Type

Shabanpour

Simovski

2022

IEEE Access

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Recently, reconfigurable intelligent surfaces (RISs) gained notable consideration due to their ability to provide efficient and cost-effective wireless communication networks. However, this powerful concept often suffers from simplistic modeling which underestimates such features of RIS as the resonant frequency dispersion and strong angular dependency of the reflection phases for both TE and TM polarizations of the incident wave. The angular and polarization instability of the reflection phase is a fundamental restriction of RISs, especially restrictive if the operation frequency band is broad. In this paper, we address this challenge for a binary RIS performed as a metasurface. We have studied the reflection phase frequency dispersion (RPFD) analytically that allowed us to engineer the needed angular and polarization properties of the RIS. Our RIS is a self-resonant grid of Jerusalem crosses located on a thin metal-backed dielectric substrate. Adjacent crosses are connected by switchable capacitive loads. We have shown the advantage of our metasurface compared to switchable mushroom-field structures and meta-gratings of resonant patches. An RIS is also fabricated and measured, and the experimental results corroborate well our numerical full wave simulations and analytical predictions.INDEX TERMS Reconfigurable intelligent surface (RIS), wireless communication, angular stability.

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