Traffic light control system and method
First Claim
Patent Images
1. A traffic light control system, comprising:
- (a) a transmitter/receiver, said transmitter/receiver for transmitting a beam towards a roadway, detecting reflections of said beam from vehicles on said roadway, and outputting a detection signal; and
(b) circuitry connected to said transmitter/receiver, said circuitry converting said detection signal into traffic light control signals;
(c) said transmitter/receiver including an array of active antennas, each of said active antennas having;
i. an oscillator including a power source and a resonator; and
ii. a radiator coinciding with said resonator;
(d) said transmitter/receiver further including interconnections among said active antennas, said interconnections coupling said active antennas together.
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Abstract
Preferred embodiments include a radar traffic light control system with a transmitter/receiver module including an array (103) of interconnected microstrip patch antennas (38) which also act as the resonators for oscillators powered by IMPATT diodes (34, 36); varactors (158) on the interconnections permit beam steering for scanning roadways.
66 Citations
8 Claims
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1. A traffic light control system, comprising:
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(a) a transmitter/receiver, said transmitter/receiver for transmitting a beam towards a roadway, detecting reflections of said beam from vehicles on said roadway, and outputting a detection signal; and (b) circuitry connected to said transmitter/receiver, said circuitry converting said detection signal into traffic light control signals; (c) said transmitter/receiver including an array of active antennas, each of said active antennas having; i. an oscillator including a power source and a resonator; and ii. a radiator coinciding with said resonator; (d) said transmitter/receiver further including interconnections among said active antennas, said interconnections coupling said active antennas together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification