In this paper, spatial processing with lens antennas arrays for direction-of-arrival (DOA) estimation is considered. In this approach, when using the Multiple Signal Classification (MUSIC) algorithm, the dimension is reduced by the front end which performs spatial processing, resulting in increased computational speed and decreased computational load. As a specific example, simulations of a 33-...

A design study has been performed for a lightweight, cylindrical array antenna for a hostile-mortar-locating radar system. A mathematical model of the array was developed which permitted tradeoff studies to be made of various array parameters. Data computed using the model compared very well with experimental and other theoretical data. Critical components of the array were built and tested and...

We have designed and constructed a custom far-infrared Fourier transform spectrometer using an antenna-coupled bolometer as a detector. The active element of the detector is a superconducting niobium microbridge, and the far-infrared signal is coupled to the microbridge via a planar antenna mounted on a hyperhemispherical silicon lens. The spectrometer uses a broadband blackbody source with fre...

The transition from NTD-Ge bolometers to TES bolometers was arguably the key innovation in bolometric receivers over the last decade. The greatest advancement of this decade will likely be remembered as integrating lithographed transmission lines between the antennas and bolometers. Several up-coming CMB experiments, including Berkeley’s Polarbear, will use this technology. This chapter begins ...