Identification system antenna with impedance transformer

Details Identification system antenna with impedance transformer Identification system antenna with impedance transformer

1994-07-25

1997-04-29

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Including magnetic material

343787, 343742, 340505, 336175, 336223, H01Q 708

Patent

active

056253702

ABSTRACT:
The present invention discloses an electromagnetic device which includes a magnetic flux producing apparatus for producing a magnetic flux path loop. The magnetic flux producing apparatus preferably comprises a magnetic core 20 surrounded by electrical windings 22. A strip of electrically conductive material 24 is disposed such that it passes through the magnetic flux path loop and overlies the windings 22. The strip 24 has a width which is substantially greater than its thickness. The device may further include an antenna 16 which is electrically coupled to the strip 24.

REFERENCES:
patent: 2411374 (1946-07-01), Horstman
patent: 2955286 (1960-10-01), Klein
patent: 3546565 (1970-12-01), Downing, Jr. et al.
patent: 3644786 (1972-02-01), Yannucci
patent: 3717876 (1973-02-01), Volkers et al.
patent: 3761938 (1973-09-01), Reggia
patent: 4155091 (1979-05-01), Vorie
patent: 4746891 (1988-05-01), Zylstra
patent: 4873527 (1989-10-01), Tan
patent: 5053774 (1991-10-01), Schuermann et al.
patent: 5373303 (1994-12-01), D'Hont
patent: 5408243 (1995-04-01), D'Hont
IBM Technical Disclosure Bulletin, vol. 21, No. 9, Feb. 9, 1979, "Structures Connecting Main Core And Shunt Core In Controlled Transformer", R. G. Brocko and G. C. Feth, pp. 3567-3568.

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