A Compact Slotted Waveguide Array Antenna With a Cubic Post Radiator for Aerial Vehicle Applications

A Compact Slotted Waveguide Array Antenna With a Cubic Post Radiator for Aerial Vehicle Applications

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This study presents a compact high-gain antenna, designed to be mounted on unmanned aerial vehicles, for millimeter-wave band applications.This antenna combines a slotted waveguide array stor trebolle (SWA) with a cubic post radiator (CPR) for performance enhancement.By utilizing the CPR structure, the radiation of the SWA antenna can be effectively focused in a particular direction, resulting in improved gain, suppressed sidelobes, and enhanced aperture efficiency.The antenna design incorporates a $10 imes 10$ array with optimized parameters, along with a centralized double-layer feeding scheme that employs reflection-canceling steps.

This feeding scheme improves the impedance bandwidth of the series feed.Consequently, the array antenna operates within an impedance bandwidth of 1.3 GHz, spanning from 26.5 to 27.

8 GHz.The fabricated prototype caramilk latte exhibits a peak realized gain of 29.1 dBi and a sidelobe level of −14.6 dB at 26.

9 GHz, with a gain variation within 2 dB across the entire operating band.Moreover, it achieves a maximum total efficiency of 95% and maximum aperture efficiency of 85%.In addition, the prototype antenna was tested on a drone, establishing a reliable wireless link between the airborne vehicle and ground station.