A Figure of Merit for Simultaneous-Multi-Beam Transmit Antenna Arrays

Abstract

We present a simple and useful figure of merit (FoM) with which to evaluate the performance of simultaneous-multibeam (SMB) transmit (TX) antenna arrays. The FoM builds upon the power-aperture product and effective isotropic radiated power for single-beam arrays and extends it to SMB arrays. The FoM is the product of radiated power, antenna aperture efficiency and the amplifiers power added efficiency. We compute the FoM for three different two-beam TX systems to highlight their differences. This will enable systematic comparison and proper system design for modern and future multi-beam radar and communications.

Design of multibeam antenna with ultralow cross‐polarization

“…Multibeam antenna can provide extremely high equivalent isotropic radiated power and gain-tonoise-temperature value, thus greatly improves the communication capacity of the satellite. [1][2][3] Usually, single-offest reflector and dual-offest reflector are used to design multibeam antenna for eliminating the effect of feed and secondary reflector. However, the asymmetry of reflector structure itself leads to the deterioration of cross-polarization (XP) and the value is generally about −25 dB, 4,5 which does not meet the high requirement in some special system.…”

Multi-Beam Luneburg Lens with Reduced Size Patch Antenna

“…By changing the structure of the radiating element, the benefits of utilizing MPA might retain; however, some parameters might suffer such as the efficiency and gain of the antenna. To make up for the drawbacks, patch antennas are also often transformed to or integrated with other structures such as phased arrays or lenses to achieve directivity for beam-scanning and beam-shaping capabilities [5][6][7][8][9][10]. However, these solutions only allow for scanning the beam over a limited angle.…”