Antenna arrangement for personal radio transceivers

• US 4,543,581 A
• Filed: 07/02/1982
• Issued: 09/24/1985
• Est. Priority Date: 07/10/1981
• Status: Expired due to Fees

• Current Assignee: Budapesti Radiotechnikai GYAR
• Original Assignee: Budapesti Radiotechnikai GYAR
• Inventors: Nemet, Mihaly
• Primary Examiner(s): Lieberman, Eli
• Assistant Examiner(s): Ohralik, K.
• Application Number:
  US06/394,837
• Time in Patent Office: 1,180 Days
• Field of Search: 343/702, 343/752, 343/749, 343/793, 343/794, 343/805, 455/82, 455/83, 455/89-129, 455/351, 455/274, 455/278
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/273 Adaptation for carrying or wearing by persons or animals

Abstract

An antenna arrangement for personal radio transceivers in which a main antenna extends from the housing of the transceiver which is excited by a high frequency connector thereof, includes an auxiliary antenna which is coupled to a cold terminal of the connector to form a counterweight for the main antenna. Both the main and auxiliary antennas are resonant and shorter than the quarterwavelength, whereby the housing is placed at a potential minimum and the effects of the close presence of a human body on radiational properties for the arrangement will be reduced.

Claims

1. A hand-held personal radio transceiver and antenna combination comprising:

(a) a housing (3) made of conductive material and adapted to be held in a user'"'"'s hand when in use;

(b) a high-frequency transmitter and receiver (2) in said housing having a warm terminal for transmitting and receiving high-frequency signals, and a cold terminal, said warm terminal being isolated from said conductive material of said housing;

high-frequency connector means for connecting said conductive material to said cold terminal;

a resonant main antenna (1) which is shorter than the quarterwave of signals to be transmitted and received by said high-frequency transmitter and receiver, said main antenna connected to said warm terminal and extending out from one end of said housing;

isolating means connected between said main antenna and said housing for isolating said main antenna from said conductive material of said housing; and

a resonant auxiliary antenna (4) which is shorter than the quarterwavelength, pivotally connected to said conductive material of said housing at a location remote from said end of said housing for establishing an electrical counterpoise to said main antenna, said auxiliary antenna extending at an angle of from 90°

to 180°

with respect to said main antenna.

2. The combination of claim 1, wherein both of said main and auxiliary antennas are linear antennas, said auxiliary antenna being pivotally mounted to said housing.

3. The combination of claim 1, wherein said auxiliary antenna (4) is pivotally mounted to a side wall of said housing (3).

4. The combination of claim 3 wherein said auxiliary antenna (4) extends substantially normally to said main antenna (1) during use.

5. The combination of claim 1, wherein at least one of said main and auxiliary antennas includes a coiled portion.

6. The combination of claim 5, wherein said at least one of said main and auxiliary antennas includes a linear section connected to said coil portion.

7. The combination of claim 1, wherein said main antenna (1) extends upwardly from a top end of said housing (3) and said auxiliary antenna (4) extends from a side wall of said housing, near a bottom end of said housing.

8. The combination of calim 7, wherein said auxiliary antenna (4) extends substantially normal to said main antenna (1).