Impedance matched surge protected coupling loop assembly
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United States of America Patent
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Issued Date -
May 12, 2005
app pub date -
Nov 12, 2003
filing date -
Nov 12, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A tower top amplifier for use outdoors in a radio frequency communications system has a surge suppression device for suppressing electrical surges caused by lightning strikes. The surge suppression circuit has a short circuit inductive coupling loop connected to a coaxial cable connector. By using a capacitor connected in parallel with an inductive probe, the surge suppression circuit operates as an open circuit at the operating frequency of the system. In addition, at the operating frequency, the resistor matches the impedance of the system connected to the coaxial cable connector. But in the event of a lightning strike or other electrical event, the inductive coupling loop short circuits the surge current to ground, thereby protecting the amplifier system from damage.
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