Integrated millimeter-wave antennas/receivers and novel high-efficiency micromachined antenna structures

Summary form only given, as follows. The article covers a variety of planar antenna designs suitable for low-cost receiver systems at millimeter-wave frequencies, namely the coplanar waveguide-fed double-slot antenna family. We have built low noise planar receivers at 77 GHz and 94 GHz using this technology for automotive systems and imaging arrays applications. Also a compact integrated radiometer at 22 GHz consisting of a planar antenna and a 6-stage MMIC amplifier chain is presented. A new monopulse tracking array at 94 GHz is also presented using a CPW-fed slot-ring antenna structure. It also discusses our recent work on micromachined microwaves. In this technology, the waveguide is replaced by a cavity which is etched in Si or GaAs using KoH or EDP and is then metalized using evaporation and/or plating techniques. This results in a new type of transmission lines, passive components and antennas with reduced weight, volume and highly improved electrical characteristics. Several new antenna designs suitable for high-efficiency millimeter-wave operation using micromachining techniques in silicon and GaAs are presented