Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Patent
1989-04-10
1990-09-04
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
333185, 439620, H03H 700
Patent
active
049547941
ABSTRACT:
A contact assembly for installation in an electrical connector, provides effective electromagnetic filtering in a simple, compact, and rugged construction that facilitates in-field replacement of a damaged contact assembly. The contact assembly includes a signal conductor, a diode for diverting high voltages on the signal conductor to ground, and a "pi" filter for filtering out unwanted frequencies. The "pi" filter includes a ferrite bead inductor coupled to the signal conductor and a first capacitor coupling a location of the signal conductor on a first side of the inductor to ground. The other capacitor of the "pi" filter is formed by the capacitance of the diode, with the diode connected to a signal conductor location on a second side of the inductor, and with the capacitance of the diode similar or equal to that of the first capacitor. The diode is mounted in a notch of the signal conductor, the ferrite bead inductor lies immediately forward of the notch, and the first capacitor lies immediately forward of the ferrite bead. A ground conductor has a sleeve portion that immediately surrounds both the first capacitor and the ferrite bead, and has a finger contacting the diode. Solder holds the finger of the ground conductor in place both mechanically and electrically. A quantity of epoxy fills the remaining notch area and forms the middle of the assembly with a cylindrical periphery to facilitate insertion and removal from a long narrow hole in the connector.
REFERENCES:
patent: 4021759 (1977-05-01), Campi
patent: 4198613 (1980-04-01), Whitley
patent: 4600262 (1986-07-01), Nieman et al.
patent: 4700155 (1987-10-01), Sakamoto et al.
patent: 4746310 (1988-05-01), Morse et al.
patent: 4747789 (1988-05-01), Gliha
patent: 4768977 (1988-09-01), Gliha, Jr. et al.
patent: 4846732 (1989-07-01), Meelhuysen
Clyatt, III Clarence L.
Moore John R.
Nieman Gerald R.
Paulus Eric J.
Ragl Albert
Ham Seung
ITT Corporation
LaRoche Eugene R.
Peterson Thomas L.
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