Electromagnetic field generating apparatus and electromagnetic field generating method

摘要

PROBLEM TO BE SOLVED: To provide a balance-unbalance converter, electromagnetic field generation device and electromagnetic field generation method, capable of being operated in a plurality of frequency bands.SOLUTION: The present invention comprises: an unbalanced transmission line in which a half-wave length of a signal to be transmitted or received is set to a line length; a switching device for shortening an electrical length of the unbalanced transmission line by shunting a core wire part conductor of the unbalanced transmission line.SELECTED DRAWING: Figure 1