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Recent suggestions have been made for the design of bulk semiconductor millimeter wave devices, and in particular, a new type of phase shifter. In order for these designs to perform in a satisfactory manner it was found necessary to demonstrate that that electromagnetic propagation would occur largely in the interior of a semiconductor dielectric waveguide with relatively low loss. In this report an analysis is made of electromagnetic waves guided in an infinite slab of material with the properties of high resistivity silicon. Calculations and preliminary experiments are demonstrated at frequencies near 16.0 GHz. It is concluded that propagation in the semiconductor medium offers the possibility of low loss circuitry and satisfies the requisites for device design.

The patent describes a millimeter horn antenna apparatus for providing millimeter wave frequencies with suppressed sidelobes and equal beamwidths in the orthogonal electric and magnetic planes.

The patent describes a channel combining circuit for homodyne receivers or other systems employing synchronous detection, which selects the output of either an in-phase detector or a quadrature phase detector. Each of two channels has an inverter circuit and two diodes making available at a common output terminal the most positive signal derived from either a positive or negative input signal from the detectors.

The patent describes a coherent, 13 bit phase reversal pulse modulator and pulse compression filter for increasing the range resolution of a coherent radar. The transmitted pulse is subdivided into equal duration bits, and as the pulse is being formed each bit may or may not be shifted in phase determined by a digital code generator. The range resolution of which this pulse reversal modulated pulse is capable is achieved by processing the radar return signal in an approximation to a matched filter.