Mobile phone antenna with improved impedance-matching circuit

Details Mobile phone antenna with improved impedance-matching circuit Mobile phone antenna with improved impedance-matching circuit

1992-05-15

1993-05-25

Hille, Rolf

Communications: radio wave antennas

Antennas

With radio cabinet

343749, 343906, H01Q 124

Patent

active

052144348

ABSTRACT:
A new antenna structure for a mobile phone mainly comprises an antenna stem, a swivel joint, a high-frequency connector, and an impedance-matching member; the swivel joint includes an antenna-mounting base, a joint-fastening base and an outer protection sleeve; the swivel joint has a very small height in the whole antenna structure; the swivel joint enables the extension antenna stem to turn freely, and to bend for storage and carrying, if necessary. The copper and spring-shaped impedance-matching member and a copper sleeve wall of the high-frequency connector form into an impedance-matching circuit; the impedance-matching member is made of a standard parts without test and adjustment so as to facilitate the assembling operation thereof, and to provide a stable reception function.

REFERENCES:
patent: 3579241 (1971-05-01), Antista
patent: 4024542 (1977-05-01), Ikawa et al.

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