Abstract: A circuit arrangement for the wireless transmission of a control signal to the control path of a controllable semiconductor valve is disclosed. More particularly, in order to avoid corona discharges at the receiving antenna of the circuit, the latter antenna is constructed in the form of a high-frequency radiator which is comprised of at least partially electrically nonconductive material.

Abstract: A microwave radio frequency signal is coupled from a coaxial line to a circular waveguide by an in line, slot-fed, open-ended, dipole termination of the coaxial-line, imbedded in a low loss dielectric material in the waveguide to excite the waveguide in a TE.sub.11 mode suitable for exciting a low backlobe dielectric rod radiator.

Abstract: A single element line scanner applicable to millimeter or submillimeter w beam steering which includes a semiconductor waveguide made of a high resistivity bulk single crystal intrinsic semiconductor material such as silicon. Parallel spaced radiator elements are disposed on one major or top surface of the semiconductor waveguide transverse to the direction of wave propagation along the waveguide. Parallel spaced PIN diodes are disposed on the other or bottom major surface of the semiconductor waveguide transverse to the direction of wave propagation. The PIN diodes are spaced close enough to prevent radiation from escaping outwardly from the bottom major surface and are provided with a variable forward bias to produce a conductivity sheet. The conductivity sheet on the bottom major surface is electronically modulated as a function of the bias current for a given frequency and the variation of such a conductivity sheet changes the wavelengths in the semiconductor waveguide.