ROME — The US Navy is cancelling its Constellation frigate program following months of cost overruns and delays but plans to keep two vessels that are already being built in Wisconsin. “We’re ...

Abstract: Compared to conventional 3D radar systems, 4D radar systems require higher angular resolution in both azimuth and elevation. Besides, sparse arrays offer several advantages, including ...

Abstract: The free-space wavelengths in the 300-GHz band are so short that it is extremely challenging to realize phased arrays with a half-wave antenna pitch, required for preventing grating lobes.