| 摘要 |
PURPOSE:To sharply enhance the isolation characteristic between an input pin and an output pin by a method wherein the input pin and the output pin are equipped with a conductor or a dielectric which is installed on both sides along their extraction direction and a facing conductor which is installed face to face with a stem part is used. CONSTITUTION:An input pin 4 and an output pin 5 are bent to the direction which is opposite to each other near the extraction part; they are extracted to the outside of a can 7 along the plane of a printed-circuit board 14; a stem part 1 and the pins 4, 5 are kept in the non-contact state; a ring-shaped dielectric 21 is fixed to prevent short-circuiting. The input pin 4 and the output pin 5 along the plane of the printedcircuit board 14 function as internal conductors; the dielectric 21 installed along the same plane as this plane, a conductor 12 as a facing conductor and, furthermore, the stem part 1 function as external conductors; a coaxial path is formed at each pair of pins 4, 5; the extraction direction of these pins is opposite to each other; the coupling amount between the pins 4, 5 is reduced sharply. By this method, the isolation characteristic between the input pin and the output pin is enhanced.
|
