RADIO WAVE HALF MIRROR FOR MILLIMETER WAVE BAND AND METHOD OF FLATTENING TRANSMITTANCE THEREOF

摘要

To provide a radio wave half mirror for a millimeter wave band which can flatten transmittance characteristics and a method of flattening the transmittance of the radio wave half mirror for a millimeter wave band. A radio wave half mirror 20 includes a metal plate 21 that has an outward shape closing a transmission line 11 and a slit 22 for transmitting electromagnetic waves that is provided in the metal plate 21 along a long side of an opening of the transmission line 11. The thickness L of the metal plate 21 in a direction in which the electromagnetic waves pass through the slit 22 is set on the basis of the transmittance characteristics of the electromagnetic waves.

主权项

1. A radio wave half mirror for a millimeter wave band that is fixed in a transmission line (11) formed by a waveguide which propagates electromagnetic waves in the millimeter wave band in a single mode, transmits some of incident electromagnetic waves, and reflects some of incident electromagnetic waves, comprising:
a blocking portion that has an outward shape blocking the transmission line; and a slit for transmitting electromagnetic waves that is provided so as to traverse the blocking portion in a direction in which opposite inner walls of the transmission line are connected, wherein a thickness of the blocking portion in a direction in which the electromagnetic waves pass through the slit is set based on transmittance characteristics of the electromagnetic waves to flatten transmittance characteristics of the radio wave half mirror for a millimeter wave band.