Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1997-09-04
1999-10-12
Sherry, Michael J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361120, H01C 712
Patent
active
059662832
ABSTRACT:
A surge suppressor for a radio frequency (RF) transmission line includes an a printed circuit board having a conductor for connection in series with a RF transmission line. The conductor has a capacitance for passing RF signals and blocking transients. To the printed circuit board are mounted a choke and a resistor, each of which is connected in series with the transmission line and in parallel to each other and to the capacitance of the conductor. The choke passes steady, direct current signals for powering equipment located on an antenna. The surge suppressor further includes the first and second discharge stages connected to the conductor on opposite sides of the impedance. Each stage includes a discharge device connected to the conductor through a radio frequency choke. The choke blocks leakage of radio frequencies into the discharge devices. A gas discharge tube is used for the first stage, which is for connection to an antenna side of the surge suppressor. A solid state device, having a lower breakdown voltage than the gas discharge tube, is used in the second stage, which is for connection to voltage sensitive equipment. The resistor assists in isolating the first and second stages. The first stage further includes a second gas discharge tube having a breakdown voltage higher than the first gas discharge tube for use in warning of degradation of the first gas discharge tube.
REFERENCES:
patent: 4630163 (1986-12-01), Cooper et al.
patent: 5136455 (1992-08-01), Billingsley
patent: 5490030 (1996-02-01), Taylor et al.
patent: 5712755 (1998-01-01), Glaser et al.
Britton James Everett
Glaser James Albert
Glaser Ronald William
ACT Communications, Inc.
Sherry Michael J.
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