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US 2015/0309170 A1Published application
Radar apparatus
AssigneeFuruno Electric Co., Ltd.
InventorsTakuya Okimoto, Yoshifumi Ohnishi
Life of this patent
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Abstract
A radar apparatus configured to prevent a harmonic generated by a limiter from being transmitted outside is provided. The radar apparatus includes a harmonic processor between a circulator and a limiter. The harmonic processor includes harmonic processing stubs , and a compensation stub. The harmonic processing stubs attenuate the harmonic which is generated when the limiter attenuates a transmission signal passed through the circulator. The compensation stub cancels a change of a susceptance caused by disposing the harmonic processing stubs.
Claims5
A radar apparatus, comprising:
- a radar antenna configured to transmit a transmission signal outside and receives, as a reception signal, a reflection wave caused by the transmission signal;
- a transmission signal generating module configured to generate the transmission signal;
- a circulator configured to output the transmission signal to the radar antenna, and output the reception signal to a reception system circuit;
- a limiter disposed in the reception system circuit and configured to attenuate the signal according to a signal level of the reception signal;
- one or more filters disposed between the circulator and the limiter and configured to attenuate a harmonic of the transmission signal propagating from the limiter to the radar antenna;
- a reception signal amplifier disposed on a downstream side of the limiter in a propagating direction of the reception signal, and configured to amplify the reception signal;
- and
- an image generating module configured to generate a radar image based on the reception signal amplified by the reception signal amplifier.
5 more elements
Dependencies are inferred from the claim text.