An 8x8 Cavity Backed Waveguide Antenna Array for D-Band Backhauling Communications

this work proposes a novel design of two-layered antenna array targeting the D-Band region of the spectrum, likely to become the next commercial battleground for millimeter-wave communications. The design is basically an 8x8 hollow metallic cavity backed antenna array which exhibits a thin planar footprint with volume of (30.1x26.4x1.2 mm(3)) and it is capable of covering the 153-161 GHz, which corresponds to 5.2% of FBW. Radiation characteristics are investigated for both 2x2 subarray and the whole 8x8 antenna where the obtained peak gain values are 12.4 dBi and 22.4 dBi, respectively. The achieved HPBW is 3.5 degrees whereas grating lobes appears at 29.These values are in-line with the requirements of next-generation point to point communications where short links are foreseen. Index Terms Antenna array, backhauling communications, D-Band, millmeter-wave, metlic waveguide, slotted antenna.