# US 5,349,361 A · Three-wave antenna for vehicles

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- Number: US 5,349,361 A
- Document ID: US5349361A
- Status: Granted
- Kind: A
- Application number: 08/124,367
- Filed: 1993-09-20
- Granted: 1994-09-20
- Earliest claimed: 1989-10-05
- Assignees: Harada Kogyo Kabushiki Kaisha
- Inventors: Yoshimi Egashira; Ryouichi Miyakawa
- Web page: https://patentgrep.com/patent/US5349361A

## CPC

- H01Q 1/084: {Pivotable antennas}
- H01Q 1/3275: {mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk}
- H01Q 5/321: within a radiating element or between connected radiating elements
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A vehicle antenna for AM/FM and MT waves including a first antenna element for MT waves vertically mounted on the vehicle roof and a second antenna element for AM/FM waves rotatably coupled to the top end of the first antenna element so that the second antenna element can be set at a desired angle relative to the roof of the vehicle. A trap element for blocking MT waves is installed near the lower end of the second antenna element.

## Claims

### Claim 1

A three-band antenna for use in automobiles comprising: a first antenna element which is installed perpendicularly on an automobile roof and is 1/4 wavelength long in telephone frequency band and resonates in the telephone frequency band; a second antenna element with its base coupled to the top part of said first antenna element via a shaft supporting assembly which is capable of rotating, said second antenna element together with said first antenna element being 1/4 wavelength long in a FM band and resonating in the FM band; and said first and second antenna elements function in the AM radio reception band; and a trap element for blocking said telephone frequency band, said trap element being interposed between said first and second antenna elements.

### Claim 2 (depends on 1)

A three-band antenna for use in automobiles according to claim 1 wherein said second antenna element is inclined at an angle with respect to the surface of the automobile roof.

### Claim 3 (depends on 2)

A three-band antenna according to claim 2 further comprising a wave divider coupled to said first antenna element for dividing a signal from said three band antenna into AM/FM frequency band and a telephone frequency band.