Design of Partially Parallel-Fed Hollow Waveguide Nallow-Wall Slot Array Antenna in Millimeter-Wave Band
نویسندگان
چکیده
High-gain and low-profile antennas are required for high-speed wireless communication systems and mechanically-scanning automotive radars in the millimeter-wave band. Waveguide antenna is one of the most attractive planar antennas for such millimeter-wave systems because of its low loss and high efficiency characteristics in high frequency band. Travelling-wave excitation is more effective for array feeding than parallel feeding systems. However, array antenna with travelling-wave excitation essentially possesses a significant problem of long line effect that gain is degraded by beam shift due to frequency changes when the array antenna is fed from the edge of radiation waveguide [1]. This paper proposes the way to reduce the gain degradation due to frequency change by using partially parallel feeding of radiation waveguide. A wideband slotted waveguide broadside array is designed in the millimeter-wave band. Simulated performance of the designed antenna is reported in this paper.
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