Antenna apparatus

• US 20080074328A1
• Filed: 09/17/2007
• Published: 03/27/2008
• Est. Priority Date: 09/21/2006
• Status: Active Grant

• Current Assignee: Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.)
• Original Assignee: Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.)
• Inventors: Kato, Takao, Noro, Junichi
• Granted Patent: US 7,782,272 B2
• Time in Patent Office: Days
• US Class Current: 343/700MS
• CPC Class Codes: H01Q 1/42 Housings not intimately mechanically associated with radiating elements, e.g. radome
• CPC Class Codes: H01Q 11/08 Helical antennas
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them

Abstract

An antenna apparatus includes: an antenna element; and a substrate on which a low noise amplifier is mounted and on which the antenna element is disposed, wherein the substrate comprises: an input unit for inputting an electric signal into the low noise amplifier from an output terminal formed at a lower part of the antenna element; an output unit for outputting the electric signal to a transmission unit connected to a signal processing unit for processing the electric signal from the antenna element; and a signal blocking unit provided between the input unit and the output unit.

Claims

1. An antenna apparatus, comprising:

an antenna element; and

a substrate on which a low noise amplifier is mounted and on which the antenna element is disposed,

wherein the substrate comprises;

an input unit for inputting an electric signal into the low noise amplifier from an output terminal formed at a lower part of the antenna element;

an output unit for outputting the electric signal to a transmission unit connected to a signal processing unit for processing the electric signal from the antenna element; and

a signal blocking unit provided between the input unit and the output unit.

2. The antenna apparatus as claimed in claim 1, wherein the antenna element comprises:

a cylindrical body formed by a flexible dielectric material film member;

an antenna pattern comprising at least one conducting wire that is formed on one face of the dielectric material film member.

3. The antenna apparatus as claimed in claim 1, wherein:

the signal blocking unit is a through hole provided in a region between the input unit and the output unit.

4. The antenna apparatus as claimed in claim 2, wherein:

the antenna pattern comprises a plurality of conducting wires, and

a phase shifter pattern which is electrically connected to the antenna pattern is formed on the one face of the dielectric material film.

5. The antenna apparatus as claimed in claim 4, wherein:

a ground face is formed at a position which is opposed to the phase shifter pattern, on the other face of the dielectric material film member, and

the cylindrical body is formed so that the other face of the dielectric material film member is an outer face.

6. The antenna apparatus as claimed in claim 2, further comprising:

a tubular outer packaging case for covering the cylindrical body, in which a tip end in an axial direction is sealed; and

a space adjusting member for adjusting a dielectric constant of the antenna pattern, the space adjusting member being provided in a space between the outer packaging case and the cylindrical body.

7. The antenna apparatus as claimed in claim 1, wherein the output unit and the input unit are disposed so as to face to each other across the signal blocking unit.