Method of disposing antenna of remote control device for vehicle

• US 5,596,234 A
• Filed: 06/09/1995
• Issued: 01/21/1997
• Est. Priority Date: 11/19/1992
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Tokai RIKA Denki Seisakusho
• Original Assignee: Kabushiki Kaisha Tokai RIKA Denki Seisakusho
• Inventors: Nakano, Yoshio, Iwasaki, Yukio, Shibagaki, Yuji, Noda, Takahisa, Umeda, Fumio
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): Elms, Richard T.
• Application Number:
  US08/433,511
• Time in Patent Office: 592 Days
• Field of Search: 307/9.1, 307/10.1, 307/10.2, 307/10.5, 180/287, 340/825.69, 340/825.72, 343/711-713, 343/715, 343/900, 343/895
• US Class Current: 307/10.2
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks
• CPC Class Codes: H01Q 1/3241 particular used in keyless entry systems
• CPC Class Codes: H01Q 1/3291 mounted in or on other locations inside the vehicle or vehicle body
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas

Abstract

A method of disposing an antenna of a remote control device for a vehicle in which an antenna is disposed so that a direction in which efficiency of the antenna becomes a predetermined value or more and an opposing direction of a pair of conductors, among a plurality of conductors existing at a periphery of a region at which the antenna is disposed, whose opposing distance with the antenna therebetween is smallest, substantially correspond. Benefits of the antenna improve without a deterioration in vehicle appearance.

Claims

1. A method of providing a remote control device for a vehicle that includes a transmitter for transmitting a predetermined radio wave and a receiving unit for receiving the transmitted predetermined radio wave, comprising the steps of:

positioning an electrical field type antenna having a free end within an interior of the vehicle and between a pair of parallel conductors such that an axis of the antenna is substantially perpendicular to the pair of parallel conductors, the antenna extending a distance that is smaller than a distance separating other conductors in a vicinity of the pair of parallel conductors, said pair of parallel conductors are separated by a distance that is smaller than a distance separated iD lh pteK conductors in the vicinity of the pair of conductors;

positioning the receiving unit within the interior of the vehicle at the antenna;

transmitting the predetermined radio wave with the transmitter;

receiving the predetermined radio wave with the receiving unit such that an orientation of an electrical field generated between the pair of parallel conductors by the transmitted predetermined radio wave substantially corresponds to the axis of the antenna, and the antenna receives an electrical field which is generated secondarily by current flowing within a body of the vehicle, whereby the receiving unit receives the predetermined radio wave reliably from a position within the interior of the vehicle.

2. A method of providing a remote control device for a vehicle according to claim 1, further comprising the step of generating a control signal when the receiving unit receives the predetermined radio wave.

3. A method of providing a remote control device for a vehicle according to claim 2, further comprising the step of using the control signal to actuate a locking mechanism of the vehicle.

4. A method of providing a remote control device for a vehicle according to claim 1, wherein the step of positioning the antenna includes positioning a helical antenna such that an axis of the antenna is substantially perpendicular to the pair of parallel conductors.

5. A method of providing a remote control device for a vehicle according to claim 1, wherein the step of positioning the receiving unit includes positioning a flat, plate shaped circuit board between, and substantially parallel to, the pair of parallel conductors.

6. A method of providing a remote control device for a vehicle according to claim 1, wherein the step of positioning the receiving unit includes positioning a flat, plate shaped circuit board between, and substantially perpendicular to, the pair of parallel conductors.

7. A method of providing a remote control device for a vehicle according to claim 1, wherein the step of positioning the antenna includes positioning a rod antenna such that an axis of the antenna is substantially perpendicular to the pair of parallel conductors.