Antenna device

Patent metadata

Field	Value
Publication number	US-9466886-B2
Application number	US-201314381061-A
Country	US
Kind code	B2
Filing date	Dec 25, 2013
Priority date	Dec 28, 2012
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

There is provided an antenna device which can suitably tilt directivity of an antenna. The antenna device includes a dielectric substrate, a conductive plate arranged on one surface of the dielectric substrate, a first slot element to which electric power is supplied from a power supply line, which has an electrical length having an approximately ½ wavelength of use frequency of the antenna device, and which is formed in the conductive plate, a second slot element which has an electrical length longer than that of the first slot element, and which is formed in the conductive plate to be substantially parallel to the first slot element by leaving a gap of an approximately ¼ wavelength of the electrical length from the first slot element, and a ground conductor arranged to be substantially parallel to the conductive plate by leaving a predetermined gap from the conductive plate.

First claim

What is claimed is:

1. An antenna device comprising:
a dielectric substrate;
a conductive plate which is arranged on one surface of the dielectric substrate;
a first slot element to which electric power is supplied from a power supply line, wherein the first slot element has an electrical length of approximately ½ wavelength of a use frequency of the antenna device, and is formed in the conductive plate;
a second slot element which has an electrical length longer than that of the first slot element, and which is formed in the conductive plate to be substantially parallel to the first slot element by leaving a gap of an electrical length of approximately ¼ wavelength of the use frequency of the antenna device from the first slot element; and
a ground conductor which is arranged to be substantially parallel to the conductive plate by leaving a predetermined gap from the conductive plate, wherein
a length of a side of the conductive plate has an electrical length of 1.47 wavelengths to 1.8 wavelengths of the use frequency of the antenna device.

2. The antenna device according to claim 1 , further comprising:
the power supply line, wherein
the power supply line is arranged between the first slot element and the ground conductor, and supplies the electric power by electromagnetic coupling to the first slot element.

3. The antenna device according to claim 1 , further comprising:
a third slot element which has an electrical length shorter than that of the first slot element, and which is formed in the conductive plate to be substantially parallel to the first slot element, by leaving a predetermined gap from the first slot element on a side opposite to the second slot element side.

4. The antenna device according to claim 1 , wherein
the dielectric substrate is a multilayer substrate,
the conductive plate is arranged on one surface of a first dielectric substrate,
the ground conductor is arranged on one surface of a second dielectric substrate arranged on the other surface side of the first dielectric substrate, and
an electronic component is mounted on the other surface of the second dielectric substrate.

5. An antenna device comprising:
a dielectric substrate;
a conductive plate which is arranged on one surface of the dielectric substrate;
a first slot element to which electric power is supplied from a power supply line, wherein the first slot element has an electrical length of approximately ½ wavelength of a use frequency of the antenna device, and is formed in the conductive plate;
a second slot element which has an electrical length longer than that of the first slot element, and which is formed in the conductive plate to be substantially parallel to the first slot element by leaving a gap of an electrical length of approximately ¼ wavelength of the use frequency of the antenna device from the first slot element; and
a ground conductor which is arranged to be substantially parallel to the conductive plate by leaving a predetermined gap from the conductive plate, wherein
the first slot element is arranged by leaving a space of an electrical length of 1.8 wavelengths or more of the use frequency of the antenna device from an end portion of the ground conductor closer to the first slot element than to the second slot element.

6. The antenna device according to claim 5 , further comprising:
the power supply line, wherein
the power supply line is arranged between the first slot element and the ground conductor, and supplies the electric power by electromagnetic coupling to the first slot element.

7. The antenna device according to claim 5 , further comprising:
a third slot element which has an electrical length shorter than that of the first slot element, and which is formed in the conductive plate to be substantially parallel to the first slot element, by leaving a predetermined gap from the first slot element on a side opposite to the second slot element side.

8. The antenna device according to claim 5 , wherein
the dielectric substrate is a multilayer substrate,
the conductive plate is arranged on one surface of a first dielectric substrate,
the ground conductor is arranged on one surface of a second dielectric substrate arranged on the other surface side of the first dielectric substrate, and
an electronic component is mounted on the other surface of the second dielectric substrate.

9. An antenna device comprising:
a dielectric substrate;
a conductive plate which is arranged on one surface of the dielectric substrate;
a first slot element to which electric power is supplied from a power supply line, wherein the first slot element has an electrical length of approximately ½ wavelength of a use frequency of the antenna device, and is formed in the conductive plate;
a second slot element which has an electrical length longer than that of the first slot element, and which is formed in the conductive plate to be substantially parallel to the first slot element by leaving a gap of an electrical length of approximately ¼ wavelength of the use frequency of the antenna device from the first slot element; and
a ground conductor which is arranged to be substantially parallel to the conductive plate by leaving a predetermined gap from the conductive plate, wherein
the second slot element is arranged by leaving a space of an electrical length of 1.75 wavelengths or less of the use frequency of the antenna device from an end portion of the ground conductor closer to the second slot element than to the first slot element.

10. The antenna device according to claim 9 , further comprising:
the power supply line, wherein
the power supply line is arranged between the first slot element and the ground conductor, and supplies the electric power by electromagnetic coupling to the first slot element.

11. The antenna device according to claim 9 , further comprising:
a third slot element which has an electrical length shorter than that of the first slot element, and which is formed in the conductive plate to be substantially parallel to the first slot element, by leaving a predetermined gap from the first slot element on a side opposite to the second slot element side.

12. The antenna device according to claim 9 , wherein
the dielectric substrate is a multilayer substrate,
the conductive plate is arranged on one surface of a first dielectric substrate,
the ground conductor is arranged on one surface of a second dielectric substrate arranged on the other surface side of the first dielectric substrate, and
an electronic component is mounted on the other surface of the second dielectric substrate.

Assignees

• Panasonic Corp
• Panasonic Ip Man Co Ltd

Inventors

• Kashino Yuichi
• Uno Hiroyuki
• Fujita Suguru
• Shiozaki Ryosuke
• Watanabe Kentaro

Classifications

• H01Q1/22

  by structural association with other equipment or articles · CPC title

• H01Q19/22

  using a secondary device in the form of a single substantially straight conductive element · CPC title

• H01Q13/106 Primary

  Microstrip slot antennas (patch antenna elements H01Q9/0407) · CPC title

• H01Q19/28

  using a secondary device in the form of two or more substantially straight conductive elements (log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10) · CPC title

• H01Q21/28

  Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} · CPC title