Patent ID: 6898971

Claim:
A method of measuring a speed of a moving sport object comprising the steps of: providing a battery powered device that includes a transmitter/receiver, at least one antenna element, a signal processor having an input connected to the transmitter/receiver, and an output annunciator having an input in communication with the signal processor, the annunciator being located remote from the antenna element; positioning the at least one antenna element in line with a path of the moving object the speed of which is to be measured; locating the transmitter/receiver, processor and annunciator remote from at least one antenna element; generating a Doppler signal proportional to the speed of the object by producing an RE signal with the transmitter/receiver, transmitting the RF signal from the transmitter/receiver to the antenna element and radiating the RF signal from the antenna element along the path of the moving object, reflecting the RF signal from the object, receiving the reflected signal with the antenna element, transmitting the reflected signal from the antenna element to the transmitter/receiver, and detecting the Doppler signal from the reflected signal with the transmitter/receiver; processing the detected Doppler signal with the signal processor and producing therefrom a digital representation of the speed of the object; and outputting the digital representation of the speed of the object with the annunciator.