Smart Antenna Design and Envelope Correlation Coefficient for Diversity Antenna Measurement Facility

摘要

Base station for smart antenna and diversity antenna or multi-antennas for mobile handset are used in the further and are solved fading interference for wireless applications. In this paper, a compact and lower profile Yagi-Uda antenna with a balanced to unbalanced (balun) feed network and directional beam controlled by reflector and directors is presented. Parasitic director, driver and reflector of the designed antenna are designed to control the beam peak and beam bandwidth by the director toward the end-fire direction to centralize radiation power energy for point to point downlink and uplink multi direction multiplexed wireless communication applications and applied 4 × 4 beamforming (bulter matrix) network for smart antenna design and measurement. The second study is envelope correlation coefficient measurement facility for diversity antenna or MIMO antenna measurement Diversity antenna requires the employment of two or more antennas for each radio link to increase the probability of receiving a better signal. In this paper, the diversity measurement （ correlation coefficient ） of two simple monopole antennas in a 3D far-field chamber for cellular band is investigated.