INVESTIGATION OF ACTIVE ANTENNA-ARRAYS AT 60 GHZ

There has been a significant effort to develop millimeter-wave active- array antennas for communications and INDIVIDUALLY radar applications [1]-[6], [31], [34], [35]. A dielectric waveguide RO is a promising me dium for this application, However, the integration of active devices, transmission media, and antennas has been difficult to achieve. This paper presents the first successful demonstration of a phase locked ar ray of millimeter wave grating surface emitters (MMWGSE). We discuss t hree aspects of MMWGSE: 1) The achievement of an optically steered mil limeter wave grating surface emitter. 2) The demonstration of a freque ncy locked array of millimeter wave grating surface emitters. 3) Rigor ous analytical studies of efficiently coupling power from a millimeter wave semiconductor device, to a waveguide which incorporates grating surface emitters. This work leads to a full monolithic array using pse udomorphic high electron mobility transistor (PHEMT)-devices.