Patent ID: 6911935

Claim:
A level measurement device for making level measurements of a material in a vessel, said level measurement device comprising: a housing; a transducer for emitting energy pulses and receiving energy pulses reflected by the material contained in the vessel; a circuit having a transmit component and a receive component, said transmit component being coupled to said transducer and said transducer being responsive to a transmit signal for emitting an energy pulse, said receive component being coupled to said transducer and said receive component generating a receive signal in response to a reflected energy pulse being received by said transducer; said circuit including a port for coupling to a controller, and said port including an input for receiving transmit control signals, and output for outputting the receive signal to said controller; said transducer comprising a planar antenna formed on the surface of a printed circuit board, said planar antenna having an input port coupled to the transmit component, and an output port coupled to the receive component in the circuit.