Wireless telephone extension unit with self-contained dipole antenna

• US 4,471,493 A
• Filed: 12/16/1982
• Issued: 09/11/1984
• Est. Priority Date: 12/16/1982
• Status: Expired due to Fees

• Current Assignee: AG Communication Systems Corp. (Nokia Corporation)
• Original Assignee: GTE Automatic Electric Incorporated (Verizon Communications Inc.)
• Inventors: Schober, Edward A.
• Primary Examiner(s): NG, JIN FAY
• Application Number:
  US06/450,496
• Time in Patent Office: 635 Days
• Field of Search: 455/89, 455/90, 455/95, 455/97, 455/128, 455/129, 455/348, 455/351, 179/2 EA, 343/702, 343/872, 343/793, 343/795, 361/422, 312/7.1, D14/53
• US Class Current: 455/575.7
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H04B 1/034 Portable transmitters
• CPC Class Codes: H04M 1/0216 Foldable in one direction, i.e. using a one degree of freedom hinge

Abstract

A remote unit for use in a wireless extension telephone system having a self-contained dipole antenna. Utilizing the unique construction of the telephone instrument housing one element of the dipole is included in a planar element that functions normally to direct sound to a self-contained microphone and the other element of the antenna is a static shield used to protect components on printed circuit board included within the extension unit.

Claims

1. A wireless extension telephone remote unit including:

a housing;

a printed circuit board included within said housing;

a radio transmitter circuit located on said printed circuit board;

a first antenna element included within said housing and located adjacent to said printed circuit board and electrically connected to said radio transmitter;

a planar unit flexibly mounted to said housing; and

a second antenna element located on said planar unit and electrically connected to said radio transmitter;

said first antenna element and said second antenna element in combination comprising a dipole antenna connected to said radio transmitter.

2. A wireless extension telephone remote unit as claimed in claim 1 wherein:

said planar unit is hingedly mounted to said housing.

3. A wireless extension telephone remote unit as claimed in claim 2 wherein:

said transmitter is disabled by a switching means actuated by said planar unit when said planar unit is folded on said hinged mounting against said housing.

4. A wireless extension telephone remote unit as claimed in claim 1 wherein:

there is further included spring means positioned between said housing and said planar unit, operated to move said planar unit from a first location to a second location.

5. A wireless extension telephone remote unit as claimed in claim 4 wherein:

said second antenna element is comprised of a metallic plate.

6. A wireless extension telephone remote unit as claimed in claim 5 wherein:

said spring means is electrically connected between said radio transmitter and said metallic plate.

7. A wireless extension telephone remote unit as claimed in claim 1 wherein:

said housing unit is constructed of electrically insulated material.

8. A wireless extension telephone remote unit as claimed in claim 1 wherein:

said planar unit is constructed of electrically insulated material.

9. A wireless extension telephone remote unit as claimed in claim 1 wherein:

said dipole antenna is further connected to a radio receiver.

10. A wireless extension telephone remote unit as claimed in claim 1 wherein:

said first antenna element comprises a static shield constructed to metallic foil.