WIDE FREQUENCY BAND HIGH TEMPERATURE SUPERCONDUCTOR MIXER ANTENNA

摘要

PROBLEM TO BE SOLVED: To use a superconductor feed line that increases its resistance loss in a high frequency area even in a low frequency area and to substantially reduce the loss by forming an oxide superconductor thin film at the center part of a plane structure antenna pattern and also preparing a nonlinear element part at the center part of the antenna pattern. ;SOLUTION: A plane structure antenna pattern 2 of a logarithmic cycle type or a spiral type, for example, and plural oxide superconductor thin film feed line wiring patterns are formed on the main surface 1 of a substrate. The pattern 2 includes an oxide superconductor thin film and a nonlinear element part 5 at its center part. Thus the pattern 2 can absorb a signal high frequency radio wave (RF) and a local reference frequency radio wave (LO). Therefore, it is not required to prepare the high frequency line patterns for both radio waves RF and LO as long as the antenna pattern part and the linear element part are eliminated on the surface 1. As a result, the effective use of spaces is attained and also the surface wave leakage can be minimized.;COPYRIGHT: (C)1997,JPO