EP 1944825 A1 20080716 - Buried radio device
Title (en)
Buried radio device
Title (de)
Verdeckte Radiovorrichtung
Title (fr)
Dispositif de radio enfouie
Publication
Application
Priority
EP 07100345 A 20070110
Abstract (en)
An underground space structure of a buried radio device includes an underground space, a metallic cover on the underground space, and an emission surface having a ring area including a structure material with transmission of electrical waves surrounding the cover. An underground radio device includes an underground antenna arranged apart from the cover in the underground and a radio device connected to the antenna. A radio device on the ground includes an antenna on the ground and a radio device connected to the antenna. The underground antenna and the antenna on the ground are connected via the emission surface including the ring area.
IPC 8 full level
CPC (source: EP)
Citation (search report)
- [XA] US 5608171 A 19970304 - HUNTER ROBERT M [US], et al
- [X] EP 0376646 A2 19900704 - TOKYO TATSUNO KK [JP]
- [X] US 2989621 A 19610620 - BARTON PAUL M, et al
- [X] US 7002481 B1 20060221 - CRANE PATRICK R [US], et al
Designated contracting state (EPC)
DE FI FR GB IT NL
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 07100345 A 20070110