Array antenna and manufacturing method thereof

A technology of array antennas and antenna elements, which is applied to antennas, individually powered antenna arrays, electrical components, etc., to achieve the effect of reducing useless radiation
CN102301533AInactive Publication Date: 2011-12-28NEC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NEC CORP
Publication Date
2011-12-28
Estimated Expiration
Not applicable · inactive patent

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Patent Text Reader

Abstract

An array antenna has: a plurality of first antenna elements arranged at predetermined element intervals on the flat surface of a substrate; a plurality of second antenna elements arranged at the element intervals in parallel to the arrangement direction of the first antenna elements on the flat surface; a first power supply circuit which supplies power to each of the first antenna elements by means of lines branched at a first branching point on the flat surface; and a second power supply circuit which supplies power to each of the second antenna elements by means of lines branched at a second branching point shifted from the first branching point by a predetermined distance in the arrangement direction on the flat surface.
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Description

technical field

[0001] The present invention relates to a technique for improving the side lobe characteristics of an array antenna. Background technique

[0002] In wireless systems such as point-to-point systems, for example parabolic antennas or array antennas are used.

[0003] Such as figure 1 As shown, a general array antenna is composed of a plurality of antenna elements provided on a printed circuit board, and a power supply circuit for supplying power to the antenna elements. The circles in this figure are antenna elements, and the solid lines connecting the antenna elements are lines (microstrip lines) constituting a power supply circuit. As shown in the figure, the antenna elements are arranged in a dot matrix on the printed circuit board.

[0004] In the array antenna having the above configuration, useless radiation (grating lobes) is generated on the printed circuit board in a direction different from the maximum radiation direction (main lobe direction). I...

Claims

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