| 摘要 |
<p>PURPOSE: A coupling adjusting structure of a double-tuned circuit is provided to secure thin and easily adjustable coupling adjusting structure of the double-tuned circuit. CONSTITUTION: A coupling adjusting structure for a double-tuned circuit comprises a printed circuit board(1); a first tuned circuit(2) comprising a first coil(4) formed by a combination of first and second conductive patterns(5,9) formed on first and second surfaces of the printed circuit board, respectively; and a second tuned circuit(3) comprising a second coil(8) formed by another combination of other first and second conductive patterns formed on the first and second surfaces of the printed circuit board, respectively. The first and second coils are configured such that the first conductive patterns formed on the first surface of the printed circuit board and the corresponding second conductive patterns formed on the second surface of the printed circuit board are connected to each other via corresponding connecting conductors, one end of the first coil and the corresponding end of the second coil are disposed close to each other, at least one first ground conductive pattern(12) is disposed at least on the first surface of the printed circuit board, and at least one first jumper member(15) connected to the first ground conductive pattern is disposed between the first and second coils so as to adjust an inductive coupling of the double-tuned circuit.</p> |
