This paper presents the design and characterization of linearly polarized low-cost transmitarray antennas with ± 70° azimuth beamforming range in V-band in order to add beam steering functionality to existing radar front ends. The transmitarray antennas are composed of 13 × 13 planar unit-cells. The unit-cells consist of two layers of RO4350B laminate and provide a one bit phase resolution. The desired unit-cell behavior has been validated by simulations and measurements. Eight transmitarrays with different phase distributions have been designed and fabricated to realize different beam steering angles in azimuth. The experimental characterization of the radiation patterns shows the desired performance in the frequency range from 59 GHz to 63 GHz. Additionally, steering angle combinations in azimuth and elevation up to 40° have been realized and successfully demonstrate by measuring the 2D radiation pattern.
Funding statement: Funding: This work was supported by Bundesministerium für Bildung und Forschung (Funder Id: http://dx.doi.org/10.13039/501100002347, Grant Number: 16ES0183).
This work was carried out in the project NetGuard6P. NetGuard6P (reference number: 16ES0183) is funded by the German ministry of education and research (BMBF) within the research programme InPro3D.
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