EP 0459391 A3 19920304 - ANTENNA FOR PORTABLE RADIO EQUIPMENT
Title (en)
ANTENNA FOR PORTABLE RADIO EQUIPMENT
Publication
Application
Priority
JP 13712590 A 19900529
Abstract (en)
[origin: EP0459391A2] An antenna (10) for portable radio equipment serves as a lambda /2 wavelength long antenna when extended (Fig.1A) or as a less than lambda /4 wavelength long antenna such as a lambda /8 wavelength long antenna when contracted (Fig.1B). Both of such antenna configurations are matched by a single matching circuit (14) with respect to impedance. The antenna radiates power efficiently in the horizontal plane. <IMAGE> <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 9/14 (2006.01); H01Q 1/10 (2006.01); H01Q 1/24 (2006.01)
CPC (source: EP)
H01Q 1/10 (2013.01); H01Q 1/242 (2013.01); H01Q 1/244 (2013.01)
Citation (search report)
- [A] US 4860024 A 19890822 - EGASHIRA YOSHIMI [JP]
- [A] GB 2213998 A 19890823 - TECHNOPHONE LTD [GB]
Designated contracting state (EPC)
DE GB IT SE
DOCDB simple family (publication)
EP 0459391 A2 19911204; EP 0459391 A3 19920304; EP 0459391 B1 19970219; AU 640787 B2 19930902; AU 7804191 A 19911205; CA 2043321 A1 19911130; CA 2043321 C 19970819; DE 69124714 D1 19970327; DE 69124714 T2 19970626; JP H0432305 A 19920204
DOCDB simple family (application)
EP 91108683 A 19910528; AU 7804191 A 19910529; CA 2043321 A 19910527; DE 69124714 T 19910528; JP 13712590 A 19900529