Radiation Characteristics of Active Frequency-Scanning Leaky-Mode Antenna Arrays (Special Issue on Microwave and Millimeter Wave Technology)

概要

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Active frequency-tuning beam-scanning leaky-mode antenna arrays have been demonstrated in this paper. These antennas integrated one or several microstrip leaky-wave antenna elements with a single varactor-tuned HEMT VCO as an active source. Noted that the measured scan angles of the 1×1 and 1×4 antennas were approximately 24° and the scanning range of the 1×2 antenna was 20°. Furthermore, reflected wave due to the open end of each leaky-wave antenna element has been suppressed by the symmetric configuration of this antenna array and the antenna efficiency increases. When comparing with the measured radiation pattern of the single element antenna, we found that the 1×2 and 1×4 antenna arrays can effectively suppress the reflected power by more than 5.5 dB and 10.5 dB, respectively, at 10.2 GHz. The power gain are more than 2 dB and 3.16 dB higher than the single element antenna with a measured EIRP of 18.67 dBm.
社団法人電子情報通信学会の論文
1999-07-25