# US 7,609,219 B2 · Slot antenna

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- Number: US 7,609,219 B2
- Document ID: US7609219B2
- Status: Granted
- Kind: B2
- Application number: 11/504,088
- Filed: 2006-08-15
- Published: 2007-03-01
- Granted: 2009-10-27
- Earliest claimed: 2005-08-23
- Assignees: Sony Corporation
- Inventors: Yuhei Hashimoto
- Web page: https://patentgrep.com/patent/US7609219B2

## CPC

- H01Q 13/10: Resonant slot antennas
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A slot antenna including: a dielectric substrate; a conductor pattern formed on a first surface of the dielectric substrate; a ground layer formed on a second surface of the dielectric substrate; a feeding point disposed at substantially a center of one side of the conductor pattern; a microstrip line extending from the feeding point to substantially a center of the conductor pattern; and a slot made with a predetermined width at a position at which the slot straddles a center line of the dielectric substrate, the center line passing through the feeding point, in the ground layer.

## Claims

### Claim 1

A slot antenna comprising:
a dielectric substrate;
a conductor pattern formed on a first surface of the dielectric substrate;
a ground layer formed on a second surface of the dielectric substrate;
a feeding point disposed at substantially the center of one edge of the conductor pattern;
a microstrip line extending from the feeding point to substantially a center of the conductor pattern;
a slot in the ground layer having a predetermined width at a position at which the slot straddles a center line of the dielectric substrate, the center line passing through the feeding point; and
an electric resistor loaded over the slot such that both ends of the electric resistor are in contact with the ground layer.

### Claim 2 (depends on 1)

The slot antenna as claimed in claim 1, further comprising
a metallic shield case mounted along the conductor pattern.

### Claim 3

A slot antenna comprising:
a dielectric substrate;
a conductor pattern formed on a first surface of the dielectric substrate;
a around layer formed on a second surface of the dielectric substrate;
a feeding point disposed at substantially the center of one edge of the conductor pattern;
a microstrip line extending from the feeding point to substantially a center of the conductor pattern; and
a slot in the ground layer having a predetermined width at a position at which the slot straddles a center line of the dielectric substrate, the center line passing through the feeding point,
wherein one or a plurality of electric resistors are loaded at appropriate positions near a center of the slot.

### Claim 4 (depends on 3)

The slot antenna as claimed in claim 3, further comprising
a metallic shield case mounted along the conductor pattern.

### Claim 5

A slot antenna comprising:
a dielectric substrate;
a conductor pattern formed on a first surface of the dielectric substrate;
a ground layer formed on a second surface of the dielectric substrate;
a feeding point disposed at substantially the center of one edge of the conductor pattern;
a microstrip line extending from the feeding point to substantially a center of the conductor pattern; and
a slot in the around layer having a predetermined width at a position at which the slot straddles a center line of the dielectric substrate, the center line passing through the feeding point,
wherein a plurality of electric resistors having different resistance values are loaded at asymmetric positions with respect to a center of the slot.

### Claim 6 (depends on 5)

The slot antenna as claimed in claim 5, further comprising
a metallic shield case mounted along the conductor pattern.