Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Reexamination Certificate
2008-09-02
2008-09-02
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
C342S108000, C342S084000, C342S085000, C342S091000, C342S092000
Reexamination Certificate
active
10581935
ABSTRACT:
In a configuration according to a short-range radar of the present invention and a method of controlling the same, the timing at which a variable-period pulse output from a variable-period pulse generator including a direct digital synthesizer (DDS) has shifted in level first since reception of a search instruction is used as a reference timing, so that a signal that shifts in level at the reference timing or a fixed lapse of time later than the reference timing is generated and output as a transmission trigger signal, and a signal that shifts in level at a timing delayed by half a period of the variable-period pulse or its integral multiple from the timing at which the transmission trigger signal is output is generated and output as a reception trigger signal. With this, by varying beforehand frequency data of the DDS based on the relationship between the frequency data and delay time between transmission and reception stored in a memory, it is possible to vary delay time between the transmission trigger signal and the reception trigger signal. It is thus possible to arbitrarily vary the delay time between transmission and reception at a high time resolution by using a simple configuration and low power dissipation.
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I. Gresham et al; A Low Noise Broadband SiGe Mixer for 24GHz Ultra-Wideband Automotive Applications; Radio and Wireless Conference, 2003, RAWCON 2003; Aug. 2003; pp. 361-364.
Notification Concerning Transmittal of Copy of International Preliminary Report on Patentability, Chapter 1 of the Patent Cooperation Treaty, and Written Opinion of the International Searching Authority, dated Apr. 17, 2007, for PCT/JP2005/018662, 6 sheets.
W2.3, Gresham, Ian, et al, “A Low-Noise Broadband SiGe Mixer for 24GHz Ultra-Wideband Automotive Applications”, M/A-COM Corporate Research and Development, Lowell, MA, 0-7803-7829-6/03/2000 IEEE,PP. 361-364.
Anritsu Corporation
Brainard Timothy A
Tarcza Thomas H.
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