Flexible Substrate based D-band End-fire Antenna for 6G application

We proposed a D-band end-fire array antenna on a flexible substrate for 6G applications. The antenna was designed using full-wave simulation, and experiments were conducted to validate the design. We achieved approximately 15 GHz bandwidth and 12.0 dBi peak realized gain in a four-element array antenna, as measured by the far-field method and a frequency extender of a vector network analyzer.