Sectoral M-Ebg Antenna With Multipolarization Capabilities for Wimax Base Stations

Abstract

A novel multipolarized sectoral antenna on a metallic electromagnetic band gap (M-EBG) surface is investigated. The M-EBG structure behaves as a partially reflecting surface (PRS) and enhances the directivity of a simple radiating source. The use of metallic structures offers a new approach to industrial partners in order to reduce costs and to facilitate design techniques. By using double layers of M-EBG structure working on orthogonal polarizations as a superstrate with a single patch feeding by two ports, multipolarization operation is achieved. This antenna provides vertical, horizontal, 0 • /90 • and circular polarizations with a sectoral radiation pattern in the azimuth plane. M-EBG antennas with sectoral pattern are usually designed only for vertical polarization. In order to verify the results a Bipolar M-EBG Sectoral antenna prototype for WIMAX application [5.15-5.35] GHz is realized and measured. Finally, we study the possibility to generate circular polarization.

Accurate and Efficient Analysis of Planar Electromagnetic Band-Gap Structures for Power Bus Noise Mitigation in the GHZ Band

“…Mixed signal systems require isolation of the analog circuitry from the digital section to decouple the current return paths, avoiding spurious signals to affect the RF functionalities [8,9]. Electromagnetic Band-Gap (EBG) structures have been introduced firstly for isolating adjacent antennas [10][11][12][13][14][15]. Later they start to be considered as a simple and easy-to-design approach to be implemented in PCBs for SSN rejection in the GHz range, where usual techniques for power bus decoupling, i.e., bypass capacitors, are not effective [16].…”