Housing mounted Z-axis antenna coil
A fob for a remote keyless entry system includes a printed circuit board (PCB) located within a housing. The PCB includes a surface on which circuitry is printed and components are mounted. A coil is mounted to the surface and provides an antenna for the fob. The coil includes a frame spaced apart from the PCB to provide room for other components on the PCB. Coil mounts extend from the frame and are received by the PCB at coil mount locations. The coil mounts contact the surface of the PCB to form an electrical connection.
1. A printed circuit board assembly comprising:
a board having a component surface;
a coil antenna supported within a bobbin, the coil antenna disposed about an axis transverse to the board; and
an electrical connection extending from the coil antenna to the board providing electrical communication between the coil antenna and a circuit disposed on the board, the electrical connection providing support for the coil antenna spaced apart from the component surface.
2. The printed circuit board of claim 1 , comprising a plurality of electrical connections extending from the bobbin.
3. The printed circuit board of claim 1 , wherein the electrical connection is a pin and the board defines a slot for receiving the pin.
4. The printed circuit board of claim 1 , wherein the electrical connection is a spring clip and the board defines a spring contact location in contact with the spring clip.
5. The printed circuit board of claim 1 , comprising a plurality of housing mounting locations on the bobbin for connecting the antenna to a housing.
6. The printed circuit board of claim 1 , wherein a component is disposed between the coil antenna and the circuit board.
7. A remote keyless entry transmitter comprising:
a transmitter housing;
a coil antenna wound about a bobbin frame;
a circuit board having a component surface; and
an electrical connection extending from the bobbin frame connecting the antenna to the circuit board, the electrical connection supporting the antenna over at least one component affixed to the component surface of the circuit board.
8. The remote keyless entry transmitter of claim 7 , wherein the electrical connection is a spring clip and the board defines a spring contact location in contact with the spring clip.
9. The remote keyless entry transmitter of claim 7 , wherein a component is mounted on the circuit board and located within a space defined between the circuit board and the antenna.
10. The remote keyless entry transmitter of claim 7 , wherein the coil antenna is wound about an axis transverse to the circuit board.
11. A method of assembling a key fob comprising:
a) mounting an antenna wound about a bobbin frame to a first half of a housing, wherein the antenna is would about an axis transverse to the first half of the housing;
b) assembling a circuit board to a second half of the housing; and
c) securing the second half of the housing to the first half of the housing such that the bobbin frame is spaced apart from the circuit board to allow space for a component mounted on the circuit board between the circuit board and the bobbin frame.
12. The method of claim 11 , wherein step c) further comprises securing an electrical connection between the circuit board and the antenna.
13. The method of claim 12 , wherein step c) further comprises inserting a pressfit pin extending from the bobbin frame within a slot defined by the circuit board.
14. The method of claim 12 , wherein step c) further comprises contacting a spring clip extending from the bobbin frame at a contact location on the circuit board to provide electrical communication between the circuit board and the antenna.