Radar detector
First Claim
1. Apparatus suitable for use in a radar detector having an antenna horn for receiving radar waves including Ka-band radar waves, a heterodyne receiving system for selectively detecting at least ones of the Ka-band radar waves among the radar waves received by said antenna horn, and a signal processing circuit for activating a warning system to issue a predetermined warning based on a radar wave detection by said heterodyne receiving system, said apparatus comprising:
- a Ka-band receiving means for selectively receiving the radar wave of said Ka-band;
a leaked local oscillation wave receiving means for detecting leaked local oscillation waves radiated from other radar detectors which leaked local oscillation waves are of frequencies substantially corresponding to local oscillation signals used to receive X-band waves by a heterodyne method; and
wherein said signal processing circuit comprises means for inhibiting said warning system from issuing said predetermined warning when said leaked local oscillation wave receiving means has detected the leaked local oscillation waves after said Ka-band receiving means has detected the radar wave of said Ka-band.
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Accused Products
Abstract
For receiving radar waves entering an antenna horn by the heterodyne method, the system is designed so that one of the local oscillation signals produced respectively by a local oscillator for the X- and K-band radar waves, a local oscillator for the Ka-band radar wave, and a local oscillator for leaked local oscillation waves can be selected to be used as the first local oscillation signal for beating down the radar waves at a first mixer. When a radar wave has been detected in the Ka-band receiving mode with the local oscillator for the Ka-band being selected, a signal processing circuit sets the heterodyne receiving system to the leaked local oscillation wave receiving mode, selecting the local oscillator for the leaked local oscillation waves as the first local oscillator. If a radar wave is detected in this mode, the signal processing circuit inhibits a warning apparatus from issuing the regular warning.
44 Citations
26 Claims
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1. Apparatus suitable for use in a radar detector having an antenna horn for receiving radar waves including Ka-band radar waves, a heterodyne receiving system for selectively detecting at least ones of the Ka-band radar waves among the radar waves received by said antenna horn, and a signal processing circuit for activating a warning system to issue a predetermined warning based on a radar wave detection by said heterodyne receiving system, said apparatus comprising:
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a Ka-band receiving means for selectively receiving the radar wave of said Ka-band; a leaked local oscillation wave receiving means for detecting leaked local oscillation waves radiated from other radar detectors which leaked local oscillation waves are of frequencies substantially corresponding to local oscillation signals used to receive X-band waves by a heterodyne method; and wherein said signal processing circuit comprises means for inhibiting said warning system from issuing said predetermined warning when said leaked local oscillation wave receiving means has detected the leaked local oscillation waves after said Ka-band receiving means has detected the radar wave of said Ka-band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A multi-band radar detector, said radar detector comprising:
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antenna means for receiving radar waves within a first band of frequencies and a second band of frequencies; first receiving means for heterodyning a selected one of the radar waves within said fist and second bands of frequencies with an oscillation signal to generate a first detection signal; signal processing means comprises means for activating a warning alarm in response to the presence of said first detection signal; and second receiving means for detecting waves other than said selected radar wave to generate a second detection signal; wherein the signal processing means further comprises inhibiting means for preventing the activation of said warning alarm when said first detection signal and said second detection signal have been generated. - View Dependent Claims (23, 24, 25, 26)
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Specification