Waveguide fed PCB-based Broadband Antenna Array for 6G Sub-THz Wireless Communication

In this work, the design and measurement of a differentially fed 4x1 D-band antenna array is demonstrated. It features a very high bandwidth of 15 GHz and utilizes a differential line feeding concept based on a rectangular WR5 waveguide. This simplifies the measurement procedure as it can be loosely attached at the back side of the RF PCB module. To investigate the applicability towards advanced packaging concepts for 6G applications, special care had been taken to reduce the required footprint within the PCB below a wavelength for this transition.