| 摘要 |
<p>A surge-protected coaxial termination (20) includes a metallic outer body (22), a center conductor (36) extending through a central bore (24) of the outer body, and a spark gap (38) created therebetween to discharge high-voltage power surges. A pair of dielectric support insulators (37, 41) support the center conductor on opposite sides of the spark gap. High impedance inductive ones (40, 42) surround the spark gap to form a T-network low pass filter that nullifies the additional capacitance of the spark gap. An axial, carbon composition resistor (44) is disposed inside the outer body, and inside the dielectric insulator to absorb the RF signal, and prevent its reflection. The resistor extends co-axially with the center conductor, and one end of the resistor is electrically coupled thereto. A blocking chip capacitor (50) extends radially from the opposite end of the resistor to the grounded outer body. The opposing second end of the resistive component may protrude from the metallic outer body and related dielectric material; the DC blocking capacitor preferably extends radially between the second end of the resistive component and the metallic outer body, or to a grounding post (52) secured thereto.</p> |
