Patent ID: 7196618

Claim:
A tire pressure monitoring device comprising: a planar circuit board; a sensor mounted on said circuit board, is adapted for detecting a pressure of a pneumatic tire of a vehicle, and operable so as to generate a signal that corresponds to the detected pressure of the pneumatic tire of the vehicle; a controller mounted on said circuit board, and operable so as to control operation of said tire pressure monitoring device; an antenna mounted on said circuit board, and operable so as to transmit the signal generated by said sensor, said antenna including a spiraling antenna section that lies on a plane parallel to said circuit board; and wherein said antenna further includes first and second antenna support sections for supporting said spiraling antenna section, each of said first and second antenna support sections having opposite first and second end portions, at least one of said first end portions of said first and second antenna support sections being mounted on said circuit board, said spiraling antenna section having inner and outer end portions, each of which extends from said second end portion of a respective one of said first and second antenna support sections.