Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Reexamination Certificate
2006-07-18
2006-07-18
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
C342S128000, C342S129000, C342S130000, C342S132000
Reexamination Certificate
active
07079071
ABSTRACT:
A radar apparatus includes: a modulation signal generating circuit that generates a modulation signal; a carrier wave generating circuit that generates a carrier wave; a modulation circuit that outputs a high frequency signal generated by modulating the carrier wave using the modulation signal that has been inputted; a modulation signal extracting circuit that extracts the modulation signal from the high frequency signal that has been inputted; and a detection signal generating circuit that generates a detection signal, which can be used to measure a distance to a measured object, based on the modulation signal extracted by the modulation signal extracting circuit from a component, out of the high frequency signal that has been transmitted via a transmission antenna, the component having been reflected by the measured object and received by a reception antenna. The modulation signal generating circuit includes a sine wave signal generating circuit that generates a sine wave signal and a pulse signal generating circuit that generates a modulation signal by converting the generated sine wave signal to a pulse signal using a step recovery diode.
REFERENCES:
patent: 3408938 (1968-11-01), Pagazani et al.
patent: 4227195 (1980-10-01), Salerno et al.
patent: 2005/0134498 (2005-06-01), Honya et al.
patent: 2005/0140542 (2005-06-01), Ikeda
patent: 2006/0039449 (2006-02-01), Fontana et al.
patent: 1545001 (2005-06-01), None
patent: 6-303114 (1994-10-01), None
patent: 2005180992 (2005-07-01), None
English Language Abstract of JP 6-303114.
Greenblum & Bernstein P.L.C.
Sotomayor John B.
TDK Corporation
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