Patent ID: 8570120
Filing Date: 2013-10-29
Classification: H01P

Abstract:
1. A heat insulating transmission line to propagate a signal, the line comprising: a first waveguide with a first aperture end; a second waveguide with a second aperture end arranged coaxially with the first waveguide, the second aperture end facing the first aperture end; an air gap between the first aperture end and the second aperture end; and a reflector provided outside the air gap, the reflector including two planar reflectors, the two planar reflectors facing each other across the air gap and spaced apart and thereby isolated from the first and second waveguides, the reflector controlling radiation power from the air gap and being longer than a length of the air gap, wherein the two planar reflectors are substantially parallel to respective virtual planes including respective long sides of the first and second aperture ends, the virtual planes each connecting an inner wall of the first aperture end and an inner wall of the second aperture end; and a distance between each virtual plane and the respective reflector is not less than N×λ/2−0.05λ and not more than N×λ/2+0.2λ (N is a positive integer), when a mean frequency of a signal transmitting through the heat insulating transmission line is expressed as λ.