Power saving type multi-band microwave detector
First Claim
1. A power-saving type multi-band microwave detector for detecting a microwave, comprising:
- a receiver circuit, for detecting said microwave, including a local oscillator for generating an oscillation output and means for sweeping the frequency of said oscillation output over a predetermined reception band;
power supply means for periodically supplying a power for said receiver circuit to maintain said receiver circuit active while the power is supplied thereto; and
control means for controlling said receiver circuit and said power supply means for an intermittent microwave receiving operation, said control means periodically operating said receiver circuit and said power supply means in a first mode having a higher sensitivity and higher power consumption and a second mode having a lower sensitivity and lower power consumption, wherein an operational period of each periodic first mode is longer than an operational period of each periodic second mode, and wherein said control means periodically performs said second mode a plurality of time for each periodically performed first mode.
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Accused Products
Abstract
A power-saving type multi-band microwave detector is operable in a high sensitivity mode and a low sensitivity mode for achieving higher sensitivity for both non-modulated and modulated microwaves to make the detecting operation reliable without causing significant increase of power consumption. The power-saving type multi-band microwave detector includes a receiver circuit including a local oscillator for generating an oscillation output and means for sweeping the frequency of the oscillation output over a predetermined reception band, a power supply for periodically supplying a power for the receiver circuit to maintain the latter active while the power is supplied, and control circuit for controlling the receiver circuit and the power supply means for an intermittent microwave receiving operation. The control circuit operates the receiver circuit and the power supply in a first mode having a higher sensitivity and higher power consumption and a second mode having a lower sensitivity and lower power consumption, and the control means periodically performing the first mode at a lower frequency than the second mode.
22 Citations
6 Claims
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1. A power-saving type multi-band microwave detector for detecting a microwave, comprising:
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a receiver circuit, for detecting said microwave, including a local oscillator for generating an oscillation output and means for sweeping the frequency of said oscillation output over a predetermined reception band; power supply means for periodically supplying a power for said receiver circuit to maintain said receiver circuit active while the power is supplied thereto; and control means for controlling said receiver circuit and said power supply means for an intermittent microwave receiving operation, said control means periodically operating said receiver circuit and said power supply means in a first mode having a higher sensitivity and higher power consumption and a second mode having a lower sensitivity and lower power consumption, wherein an operational period of each periodic first mode is longer than an operational period of each periodic second mode, and wherein said control means periodically performs said second mode a plurality of time for each periodically performed first mode. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification