Design of Antenna to Realize Next Generation Communication

Design of Antenna to Realize Next Generation Communication

Design of Ultra Wide Band MIMO Antenna

　UWB and MIMO technologies have attracted considerable research attention for realizing large-capacity and high-speed communication. UWB (Ultra Wide Band) is a communication technology for wider frequency bands than normally used; communication capacity increases with bandwidth. UWB technology offers the possibility of realizing large-capacity and high-speed communication. Of course, antenna designs that can support the bandwidths expected are required. MIMO (Multiple Input Multiple Output) is a communication technology that uses multiple streams to transmit data; data streams are sent and received by using multiple antennas at the same time. This offers high-speed transmission as the multiple antennas can be controlled to establish desirable communication characteristics. We have developed a leaf-shaped bowtie antenna as an UWB antenna; furthermore, we have applied it to MIMO communication.

Design of Dual-Frequency Antenna by Applying Rectangular Loop Antenna

　Hentenna, a type of rectangular loop antenna, is known to have higher gain than other loop antennas with similar loop area. Hentenna is a balanced antenna element, so normally a balanced feed would be used. However, this arrangement yields a single resonate frequency determined by the loop length. However, our research shows by using unbalanced feeds, Hentenna can offer dual-frequency resonance. Our study is developing this antenna for dual-frequency use as well using it for MIMO or wide frequency applications with a parasitic element.