Portable through-the-earth radio

The present invention provides an apparatus for portable through-the-earth radio (PTTER). The PTTER provides bidirectional voice and/or data communication between a surface radio and a portable radio. The PTTER also provides a transmit antenna having a primary loop and one or more secondary loops co...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	KWASNIOK PETER, PUZAKOV VLADIMIR, SVILANS MARKUS, ROPER MICHAEL
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION
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