Propagation in a Solid State Plasma Waveguide in a Transverse Magnetic Field

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Microwave propagation at 24 Gc was observed in a waveguide filled by InSb containing an electron-ion plasma at 77°K. A transverse magnetic field in excess of 5 KOe was used, and the transmission increased exponentially with increasing magnetic field intensiy. The transmission showed a sharp angular dependence on the field direction and a strong nonreciprocal character which may be of use in millimeter or submillimeter wave devices. Measurements of the phase shift in the InSb showed that the wave is transmitted only along the side of the waveguide determined by the magnetic field and power flow directions, and that the wave length increases with increasing magnetic field.