Solid-State Millimeter-Wave Source Study: A Study of Two Novel Concepts for Generation of CW Millimeter Waves.

摘要

Two novel device concepts for generating CW millimeter waves with output power in the multi-watt range were investigated. The first concept involves the utilization of modulated lasser radiation to induce in a distributed Schottky diode structure a travelling-wave current which, in turn, synchronously excites the dominant mode of a waveguide structure to generate millimeter power. The induced travelling-wave current is directly proportional to the laser modulation generated by the interference of two overlapping laser beams of millimeter beat frequency. Experimentally, we have thus far demonstrated this concept of millimeter wave generation using a point-like Hg/CdTe diode/waveguide structure. The second concept involves the use of a distributed IMPATT diode/waveguide structure. This structure is battery-operated and requires no optical excitation, simply an elongated Read-type diode in the gap of a specially designed ridgeguide. In this structure, the field-current interaction is very strong, resulting in a growing travelling wave which extracts energy from the DC bias. (Author)