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RF connector for connecting a mobile radiotelephone to a rack

  • US 5,057,847 A
  • Filed: 05/22/1990
  • Issued: 10/15/1991
  • Est. Priority Date: 05/22/1989
  • Status: Expired due to Term
First Claim
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1. An RF connector for connecting a mobile device to a corresponding device rack for releasably receiving the mobile device, comprising:

  • an external antenna connected to the rack;

    a first pair of metal plates on the mobile device;

    the corresponding device rack having a second pair or metal plates;

    said first and second pairs of metal plates forming a capacitative two-wire connector-interface when the mobile device is received in the rack, each connector-interface including a capacitor formed from one of said first pair of metal plates and one of said second pair of metal plates;

    said capacitor having a coil in serial connection therewith, each said coil and capacitor connection forming a resonant circuit at a desired transmission frequency;

    a first balancing transformer in said mobile device for transforming an unbalanced signal received from an input cable into a balanced signal and for sending said balanced signal to an input of said resonant circuit; and

    a second balancing transformer in said rack for receiving said balanced signal from an output of said resonant circuit and transforming said balanced signal into an unbalanced signal and for sending said unbalanced signal to an output cable.

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