Directivity controllable antenna and antenna unit using the same
First Claim
1. An antenna with a directivity, comprising:
- a ground conductor;
at least two power supply sections placed on a surface of the ground conductor;
at least two antenna elements connected one-to-one to the power supply sections;
a top conductor opposed to the ground conductor across the antenna elements;
side conductors surrounding a space including the antenna elements, being located apart from the antenna elements, and forming, together with the top conductor and the ground conductor, an antenna box having at least two openings; and
a power supply control section for controlling signals passing through between an external connecting terminal and the power supply sections.
1 Assignment
0 Petitions
Accused Products
Abstract
A top conductor 11, a ground conductor 12, and side conductors 13 form an antenna box having two openings 22 and 23. Antenna elements 14 and 15 are placed inside of the antenna box, and are connected to power supply points 16 and 17, respectively. A power supply control circuit 20 has a switching function of connecting either one of the power supply points 16 and 17, to an external connecting terminal 21. Depending on the antenna element 14 or 15 being operated, the antenna has a directivity biased to a desired direction. The power supply control circuit 20 may have a signal combining/separating function, a phase shifter 26, or an amplitude adjusting circuit 27. With this, it is possible to provide a small, slim antenna capable of biasing the directivity to a desired direction and controlling the directivity even after installation.
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Citations
32 Claims
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1. An antenna with a directivity, comprising:
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a ground conductor;
at least two power supply sections placed on a surface of the ground conductor;
at least two antenna elements connected one-to-one to the power supply sections;
a top conductor opposed to the ground conductor across the antenna elements;
side conductors surrounding a space including the antenna elements, being located apart from the antenna elements, and forming, together with the top conductor and the ground conductor, an antenna box having at least two openings; and
a power supply control section for controlling signals passing through between an external connecting terminal and the power supply sections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An antenna unit including an antenna with a directivity, comprising:
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a ground conductor;
at least two power supply sections placed on a surface of the ground conductor;
at least two antenna elements connected one-to-one to the power supply sections;
a top conductor opposed to the ground conductor across the antenna elements;
side conductors surrounding a space including the antenna elements, being located apart from the antenna elements, and forming, together with the top conductor and the ground conductor, an antenna box having at least two openings;
a power supply control section for controlling signals passing through between an external connecting terminal and the power supply sections; and
a radio circuit for supplying the antenna connecting terminal with a radio signal received from an antenna control device externally provided, and transmitting a radio signal output from the antenna connecting terminal to the antenna control device. - View Dependent Claims (30, 31, 32)
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Specification
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- Resources
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Current AssigneeMatsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
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Original AssigneeMatsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
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InventorsYamamoto, Atsushi, Iwai, Hiroshi, Ogawa, Koichi
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current343/702
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CPC Class CodesH01Q 13/18 the slot being backed by, o...H01Q 3/24 varying the orientation by ...H01Q 3/26 varying the relative phase ...H01Q 9/0421 with a shorting wall or a s...
