Remote keyless entry system having a helical antenna
First Claim
1. A vehicle controller for use inside a vehicle in a remote keyless entry system for controlling a vehicle device function comprising means for receiving a coded RF request signal from a portable transmitter and means for controlling said vehicle device upon receipt of a proper said RF request signal, wherein said receiving means includes a flat non-conductive circuit board, a flat ground plane disposed on said circuit board, and a helical antenna mounted on said circuit board and electrically insulated from said ground plane by said circuit board and including an elongated conductive member having a signal output end and an opposite free end, said conductive member being helically coiled about a helical axis with said helical axis being oriented perpendicular to said ground plane with said antenna being configured to provide an omni-directional radiation pattern about said helical axis.
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Accused Products
Abstract
A vehicle controller is presented for use in a remote keyless entry system for controlling a vehicle device function. The controller includes a receiver for receiving a RF request signal including a security code uniquely identifying a portable transmitter that is authorized entry into the vehicle and for controlling access to the vehicle when the received security code matches a prestored security code. A circuit board carries the receiver and a flat ground plane. A helical antenna is mounted on the circuit board and includes an elongated conductive member having one end electrically connected to the receiver means and an opposite free end. The conductive member is helically coiled about a helical axis intermediate the ends thereof with the helical axis being perpendicular to the ground plane. The antenna is configured to provide an omni-directional radiation pattern about the helical axis.
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Citations
12 Claims
- 1. A vehicle controller for use inside a vehicle in a remote keyless entry system for controlling a vehicle device function comprising means for receiving a coded RF request signal from a portable transmitter and means for controlling said vehicle device upon receipt of a proper said RF request signal, wherein said receiving means includes a flat non-conductive circuit board, a flat ground plane disposed on said circuit board, and a helical antenna mounted on said circuit board and electrically insulated from said ground plane by said circuit board and including an elongated conductive member having a signal output end and an opposite free end, said conductive member being helically coiled about a helical axis with said helical axis being oriented perpendicular to said ground plane with said antenna being configured to provide an omni-directional radiation pattern about said helical axis.
Specification