A Low-Profile Pattern Reconfigurable Antenna System for Automotive Mimo Applications

Abstract

This paper presents the design and evaluation of a compact antenna system with pattern reconfigurability at 2.6 GHz. The antenna is based on the concept of an electronically steerable parasitic array radiator (ESPAR), and its height is reduced by top loading. The antenna can generate 10 reconfigurable patterns with a maximal gain of 7.4 dBi. Furthermore, a multiple antenna system consisting of these antennas is proposed. The radiation patterns realized by this multiple-input-multipleoutput (MIMO) system are optimized for automotive urban scenarios based on the results of previous research. The S-parameter measurement results of a fabricated prototype correlate with the simulation. Furthermore, 3D measurements of radiation patterns correspond very well with simulation and gain up to 8 dBi is obtained.

Dynamically Switched Dual-Band Dual-Polarized Dual-Sense Low-Profile Compact Slot Circularly Polarized Antenna Assisted With High Gain Reflector for Sub-6 GHZ and X-Band Applications

“…The present technology can be extended to array antennas using phase shifters, where the relative phases of RF signal carriers can be changed to accomplish beam steerable radiations at different directions. Also the design can be extended to MIMO antennas [37,38,43], since excitation of uni-planar slot structure does not require finite ground plane, and can be oriented in different configurations to provide radiation diversity [42] and isolation improvements.…”