Abstract
The design of an active leaky-wave antenna which integrates the antenna with a feedback synthesiser is introduced. The measurement result shows that the antenna has very low back lobe radiation compared with that of traditional single-terminal feeding leaky-wave antennas. Single frequency measurement shows that the radiated power difference between the main beam and back lobe is > 15 dB at 8.2 GHz. For the designed feedback synthesiser antenna, the measured radiated power difference between the main beam and back lobe is > 15 dB at 9.25 GHz, and the scanning angle is ~5° as the synthesiser frequency sweeps from 9.25 to 9.37 GHz.
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