Design and Fabrication of W-Band Waveguide Slotted Array Antenna Based on Milling Process

Abstract EN

A single-layer waveguide slotted array antenna is proposed for W-band applications.

To eliminate the alignment errors, all structures including the radiation slots, radiation waveguides, and power divider network are realized in one layer based on the milling process, and a planar metal plate is employed to cover the bottom.

For example, an 8 × 9 array is designed with 1-to-8 power divider network to validate the proposed technology.

The effective radiation aperture size of the array is 24 mm × 21 mm, and the height is only 8 mm.

The measured reflection coefficient of the antenna is larger than 3 GHz for S11 < −10 dB.

The peak gain is 25.9 dBi, and the corresponding antenna efficiency is about 65%.

All cross-polarization of the antenna array is less than −35 dB.

The proposed array antenna features a simple structure, low cost, and easy implementation for W-band applications.