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US 5,315,302 AGranted
Radar detector
AssigneeUniden Corporation
InventorsShuichi Katsukura, Mikio Iwakuni
Life of this patent
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AssigneeUniden Corporation
InventorsShuichi Katsukura, Mikio Iwakuni
Estimating the term…
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.
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 multi-band radar detector, said radar detector comprising:
Dependencies are inferred from the claim text.