RADIO WAVE TRANSMITTING DEVICE FOR ROBBERY PREVENTION SYSTEM

PROBLEM TO BE SOLVED: To provide a radio wave transmitting device for robbery prevention system for attaining remarkable cost-down. SOLUTION: Concerning a radio wave transmitting device 1, a change in an inductance value L of a transmitting antenna 5 is suppressed corresponding to a distance set bet...

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Bibliographische Detailangaben
1. Verfasser:	TSUCHIKIRI YOSHIKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS ANTENNAS, i.e. RADIO AERIALS BASIC ELECTRIC ELEMENTS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS TRANSMISSION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a radio wave transmitting device for robbery prevention system for attaining remarkable cost-down. SOLUTION: Concerning a radio wave transmitting device 1, a change in an inductance value L of a transmitting antenna 5 is suppressed corresponding to a distance set between the transmitting antenna 5 housed in a easing 2 composed of a non-metal and the easing 2 even when a metallic object exists around the easing 2 and even without an automatic tuning circuit to use many expensive parts, the transmission output of a prescribed radio wave signal can be stabilized at high level.