Cordless communications system

• US 4,747,158 A
• Filed: 10/01/1986
• Issued: 05/24/1988
• Est. Priority Date: 01/22/1985
• Status: Expired due to Fees

• Current Assignee: DNE Technologies, Inc. (Ultra Electronics Holdings PLC)
• Original Assignee: DNE Technologies, Inc. (Ultra Electronics Holdings PLC)
• Inventors: McCoy, Bruce E., Riter, John J. Jr., Goldberg, Joshua I., Lardiere, Benjamin G. Jr.
• Primary Examiner(s): Griffin, Robert L.
• Assistant Examiner(s): KUNTZ, CURTIS A
• Application Number:
  US06/914,080
• Time in Patent Office: 601 Days
• Field of Search: 455/14, 455/41, 455/54, 455/55, 455/56, 455/21, 455/22, 455/11, 455/13, 455/15, 455/90, 381/79, 379/55, 178/43
• US Class Current: 455/11.1
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/48 Transceivers

Abstract

A cordless communications system wherein transmission is made and received via magnetic lines of induction comprises a base station and at least one mobile station wherein the base station receives and transmits voice or data signals at different frequencies. A PIGLER unit is selectively disposed between the base station and mobile station so as to extend the range of the communications system.

Claims

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

a base station, at least one mobile station and at least one PIGLER unit disposed between said base station and said at least one mobile station;

said base station having a first base magnetic loop antenna and a second base magnetic loop antenna for transmission and reception of magnetic signals, base transmitting means coupled to said first base magnetic loop antenna for transmitting a first signal to said PIGLER unit, base receiving means coupled to said second base magnetic loop antenna for receiving a second signal from said PIGLER unit;

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 signal from said PIGLER unit, 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 PIGLER unit; and

said at least one PIGLER unit having a first PIGLER loop antenna proximate to said base station and a second PIGLER loop antenna proximate to said at least one mobile station and means for coupling said first PIGLER loop antenna to said second PIGLER loop antenna wherein said first PIGLER loop antenna receives said first signal from said base transmitting means and retransmits said first signal to said second PIGLER loop antenna and wherein said second PIGLER loop antenna receives said second signal from said mobile transmitting means and retransmits said second signal to said first PIGLER loop antenna.

2. A cordless communications system according to claim 1 wherein said first PIGLER loop antenna and said second PIGLER loop antenna are coupled via a ground wire.

3. A cordless communications system according to claim 1 wherein said first PIGLER loop antenna and said second PIGLER loop antenna each have linear impedance matching filters.

4. A cordless communications system according to claim 2 wherein said first PIGLER loop antenna and said second PIGLER loop antenna each have linear impedance matching filters.