Directional antenna device

A technology of directional antennas and antenna units, applied in directions such as antennas, antenna arrays, diversity/multi-antenna systems, etc., can solve problems such as inability to work, and it is difficult to maintain stable transmission and reception.
CN1883135AInactive Publication Date: 2006-12-20SHIN NIPPON HERIKOPUTAA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHIN NIPPON HERIKOPUTAA
Publication Date
2006-12-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

There is provided a directional antenna device for receiving a radio wave of a microwave band transmitted from a communication unit arranged on a mobile body, by using an antenna unit having directivity arranged on a fixed body fixed to a predetermined position. The antenna unit includes: a plurality of directional antennas arranged with directivities in different directions; and a reception selection unit for selecting one of the directional antennas arranged in the transmission direction in which the radio wave reaches the fixed body, thereby receiving the radio wave. Thus, it is possible to provide a directional antenna device capable of performing stable transmission and reception without being affected by the relative position between the mobile body and the fixed body.
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Description

technical field

[0001] The present invention relates to a directional antenna device used in mobile communications, and more particularly, to a technology capable of reducing noise or reducing the influence of strong electromagnetic fields on adjacent frequencies for transmitting and receiving radio waves in the microwave frequency band . Background technique

[0002] In recent years, mobile communication has been rapidly developed, and in mobile communication, one of sending and receiving communication, or both, is performed while in motion. Mobile communication is a communication system that operates (on a radio wave in the microwave frequency band) with very little electric power, which satisfies the following conditions: a station that allows radio broadcasting does not need to have a license as stipulated in Article 4 of the Radio Law. For example, a radio wave in the microwave frequency band is transmitted from a communication device (a communication unit) provided in...

Claims

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