| 摘要 |
<p>A launcher (10) has an outer conductor (26) and a tapered central contact pin (42) within a bore (28) of the outer conductor (26) and connects a coaxial transmission line with a microstrip transmission line (12). When used with a microstrip transmission line (12) having a specific thickness of dielectric substrate (16) it provides matching of both the characteristic impedance and the electro-magnetic field configuration. The launcher (10) may also be used effectively with microstrip transmission lines having different substrate thicknesses. An adjustable stop (46) transversely positions the upper surface of the microstrip transmission line (12) relative to the launcher's outer conductor (26) to counteract capacitive discontinuities caused by different subtrate thicknesses. Although such adjustments flex the central contact pin (42) transversely, thus changing the launcher's characteristic impedance, the launcher provides better overall matching between the two types of transmission lines. The contact tip (44) of the pin (42) has a cylindrical contact surface coaxial with the pin, thus forming a repeatable line contact with the upper conductor (14) of the microstrip transmission line (12) enabling consistent results. The bore (28) of the outer conductor (26) is at an angle with respect to the coaxial transmission line jack (30), allowing the tapered pin (42) to extend coaxially with the jack (30) so that the pin (42) can be drilled and tapped on its center axis, simplifying its mass production.</p> |
