×

Cordless communications system

  • US 4,584,707 A
  • Filed: 01/22/1985
  • Issued: 04/22/1986
  • Est. Priority Date: 01/22/1985
  • Status: Expired due to Fees
First Claim
Patent Images

1. A cordless communications system wherein transmission is made and received via magnetic lines of induction comprising:

  • a base station and at least one mobile station;

    said base station having a first magnetic loop antenna and a second magnetic loop antenna wherein said first and second magnetic loop antennas are each oriented so as to provide a individual toroidal magnetic fields each of which allows for 360°

    transmission and reception of magnetic signals in the plane of said first magnetic loop antenna and said second magnetic loop antenna respectively, transmitting means coupled to said first magnetic loop antenna for transmitting a first modulated signal to said at least one mobile station at a first operating frequency, receiving means coupled to said second magnetic loop antenna for receiving and demodulating a second modulated signal from said at least one mobile station at a second operating frequency different from said first operating frequency; and

    said at least one mobile station having a mobile magnetic loop antenna coupled to an antenna switch having first and second operating positions, mobile receiving means coupled to said mobile magnetic loop antenna when said antenna switch is in said first position for receiving said first modulated signal from said base station at said first operating frequency, mobile transmitting means coupled to said mobile magnetic loop antenna when said antenna switch is in said second position for transmitting said second signal to said base station at said second operating frequency and means for switching said antenna switch from said first position to said second position when transmitting.

View all claims
  • 11 Assignments
Timeline View
Assignment View
    ×
    ×