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A novel design for a beam‐switching antenna based on a new reconfigurable frequency selective surface (FSS) is presented at 2.1 GHz operating frequency. The antenna system consists of an omnidirectional antenna and a cylindrical FSS for controlling its radiation pattern characteristics. The discontinuous split‐ring resonator (SRR) cross‐shape FSS is composed of 12 FSS unit cells with 4 active elements in each one. To reconfigure the radiation pattern of the antenna, a PIN‐diode is specifically placed in the discontinuity of the FSS hybrid element for its switching functions. The antenna radiation sector is determined by the off‐state diodes. This design is used to realise a beam‐switching active antenna covering all azimuth angles. The measurement results are in line with the simulation and confirm the proposed configuration of the antenna. The measurement of the proposed design at the operating frequency resulted in a gain of 8.1 dBi. This antenna can be used in the base station of the wireless communication systems.

In this article, a new high‐gain resonant cavity (RC) antenna with a frequency selective surface (FSS) superstrate is presented at 6 GHz operating frequency. The high‐gain FSS antenna is constructed by a new FSS superstrate layer, providing more freedom to improve the radiation pattern characteristics. A hybrid FSS element placed on top of the antenna is also investigated to estimate the required number of unit cells. The achieved simulation results for this antenna are thoroughly studied and the FSS superstrate enhancing the proposed antenna gain is discussed. Moreover, parametric studies for the patch antenna with and without FSS superstrate are also presented to demonstrate the effect of the new FSS superstrate on the radiation pattern characteristics. The measured results are achieved to support the simulation ones. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:448–453, 2016

In this paper, we intend to study the synthesis of the multibeam arrays. The synthesis implementation's method for this type of arrays permits to approach the appropriated radiance's diagram. The used approach is based on neural network that are capable to model the multibeam arrays, consider predetermined general criteria's, and finally it permits to predict the appropriated diagram from the neural model. Our main contribution in this paper is the extension of a synthesis model of these multibeam arrays.

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