SYSTEM AND METHOD FOR EXTENDING REMOTE VEHICLE CONTROL FUNCTIONS
A remote keyless system (RKS) includes a remote control device configured to create a signal having at least a component at a first frequency and an antenna assembly coupled to a vehicle that includes a first antenna tuned to receive a signal in a frequency band. The RKS also includes a first filter coupled to the first antenna and configured to pass the first frequency and a second filter coupled to the first antenna and configured to pass the frequency band. The RKS also includes a remote keyless system controller coupled to the first filter that, upon receipt of a predetermined signal, causes the vehicle to perform an action. The first frequency is an integer multiple of a frequency in the frequency band.
1 . A remote keyless system comprising:
a remote control device configured to create a signal having at least a component at a first frequency;
an antenna assembly coupled to a vehicle, the antenna assembly including a first antenna tuned to receive a signal in a frequency band;
a first filter coupled to the first antenna and configured to pass the first frequency;
a second filter coupled to the first antenna and configured to pass the frequency band; and
a remote keyless system controller coupled to the first filter that, upon receipt of a predetermined signal, causes the vehicle to perform an action;
wherein the first frequency is an integer multiple of a frequency in the frequency band.
2 . The remote keyless system of claim 1 , wherein the first frequency is about 315 MHz.
3 . The remote keyless system of claim 2 , wherein the first frequency is 314.9 MHz.
4 . The remote keyless system of claim 1 , wherein the frequency band includes frequencies between 87.5 to 108.0 MHz.
5 . The remote keyless system of claim 1 , wherein the first frequency is a third harmonic of one of the frequencies in the frequency band.
6 . The remote keyless system of claim 1 , further comprising:
a remote keyless system amplifier coupled between the first filter and the remote keyless system controller.
7 . The remote keyless system of claim 1 , wherein the first antenna is tuned to receive signals in an FM radio frequency band.
8 . The remote keyless system of claim 7 , further comprising a second antenna tuned to receive signals in an AM radio frequency band.
9 . The remote keyless system of claim 8 , wherein at least one of the first and second antennas are coupled to a back glass of the vehicle.
10 . The remote keyless system of claim 1 , wherein the action is selected from one of locking a door of the vehicle, unlocking a door of the vehicle, starting the vehicle or a combination thereof.
11 . A vehicle comprising:
remote keyless system controller configured to receive a signal having a first frequency and to cause the vehicle to perform an action;
an antenna assembly coupled to the vehicle, the antenna assembly including a first antenna tuned to receive a signal in a frequency band;
a first filter coupled to the first antenna and configured to pass the first frequency; and
a second filter coupled to the first antenna and configured to pass the frequency band, wherein the first frequency is an integer multiple of a frequency in the frequency band.
12 . The vehicle of claim 11 , wherein the first frequency is about 315 MHz.
13 . The vehicle of claim 12 , wherein the first frequency is 314.9 MHz.
14 . The vehicle of claim 11 , wherein the frequency band includes frequencies between 87.5 to 108.0 MHz.
15 . The vehicle of claim 11 , wherein the first frequency is a third harmonic of one of the frequencies in the frequency band.
16 . The vehicle of claim 11 , further comprising:
a remote keyless system amplifier coupled between the first filter and the remote keyless system controller.
17 . The vehicle of claim 11 , wherein the first antenna is tuned to receive signals in an FM radio frequency band.
18 . The remote keyless system of claim 17 , further comprising a second antenna tuned to receive signals in an AM radio frequency band.
19 . The vehicle of claim 18 , wherein at least one of the first and second antennas are coupled to a back glass of the vehicle.
20 . The remote keyless system of claim 11 , wherein the action is selected from one of locking a door of the vehicle, unlocking a door of the vehicle, starting the vehicle or a combination thereof.