Communications: directive radio wave systems and devices (e.g. – With particular circuit – Display
Reexamination Certificate
2008-06-24
2008-06-24
Gregory, Bernarr E (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Display
C342S022000, C342S118000, C342S128000, C342S134000, C342S135000, C342S165000, C342S173000, C342S174000, C342S175000, C342S176000, C342S194000, C342S195000, C342S196000, C343S757000
Reexamination Certificate
active
07391362
ABSTRACT:
A FM-CW radar system comprises a frequency modulated continuous wave digital generator that produces both in-phase (I) and quadrature-phase (Q) outputs to orthogonally oriented transmitter antennas. A linearly polarized beam is output from a switched antenna array that allows a variety of I-and-Q pairs of bowtie antennas to be alternately connected to the transmitter and receiver. The receiver inputs I-and-Q signals from another bowtie antenna in the array and mixes these with samples from the transmitter. Such synchronous detection produces I-and-Q beat frequency products that are sampled by dual analog-to-digital converters (ADC's). The digital samples receive four kinds of compensation, including frequency-and-phase, wiring delay, and fast Fourier transform (FFT). The compensated samples are then digitally converted by an FFT-unit into time-domain signals. Such can then be processed conventionally for range information to the target that has returned the FM-CW echo signal.
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Gregory Bernarr E
Hill Robert Charles
Land Ray Technology, Inc.
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