Antenna arrangement for personal radio transceivers
AssigneeBudapesti Radiotechnikai Gyar
InventorMihaly Nemet
Life of this patent
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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.
Claims8
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.degree. to 180.degree. with respect to said main antenna.
The combination of calim 7, wherein said auxiliary antenna (4) extends substantially normal to said main antenna (1).
Dependencies are inferred from the claim text.