(19)
(11) EP 0 718 909 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.08.1996 Bulletin 1996/32

(43) Date of publication A2:
26.06.1996 Bulletin 1996/26

(21) Application number: 95308453.0

(22) Date of filing: 24.11.1995
(51) International Patent Classification (IPC)6H01Q 1/22, H01Q 9/30
(84) Designated Contracting States:
DE GB NL SE

(30) Priority: 23.12.1994 GB 9426229

(71) Applicant: NOKIA MOBILE PHONES LTD.
SF-24101 Salo (FI)

(72) Inventors:
  • Davidson, Brian James
    Woking, Surrey GU21 3QD (GB)
  • Goodwin, Stephen
    Frimley Green, Surrey GU16 6HH (GB)

(74) Representative: Haws, Helen Louise et al
Nokia Mobile Phones, Patent Department, St. Georges Court/St. Georges Road, 9 High Street
Camberley, Surrey GU15 3QZ
Camberley, Surrey GU15 3QZ (GB)

   


(54) Retractable top load antenna


(57) An antenna assembly comprises an elongate antenna element (11) mounted in a support (5) and movable between a retracted position and an extended position. A helical antenna element (12) in electrical contact with the helical element is carried at one end of the elongate element. The coupling between the feed point and the antenna in the retracted and extended positions allow the same matching circuitry to be used in both conditions. The invention provides a compact and convenient dual antenna arrangement ideally suited for use in a portable cellular radio telephone.







Search report