Radio wave receiving apparatus having an improved antenna resolu

Communications: directive radio wave systems and devices (e.g. – With particular circuit – Digital processing

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342 25, G01S 1300

Patent

active

061632937

ABSTRACT:
A radio wave receiving apparatus including having improved antenna resolution. The apparatus includes a signal processing circuit; a circuit for performing the Fourier transform with respect to an azimuth of an electric field signal outputted from an antenna receiving circuit; a circuit for performing the Fourier transform with respect to an azimuth of the antenna pattern of an antenna; a circuit for dividing the Fourier transform signal resulting from the electric field signal by the antenna pattern Fourier transform signal; and a circuit for passing the divided signal through a low-pass filter in respect of azimuthal frequency and then subjecting it to a Fourier inverse transform in respect of azimuth, so as to output the signal after the Fourier inverse transform as a final antenna output, thereby improving the antenna resolution by using a transfer function in the azimuthal frequency domain resulting from the Fourier transform of the antenna pattern with respect to an azimuth.

REFERENCES:
patent: 4617570 (1986-10-01), Gutleber
patent: 5532699 (1996-07-01), Smith
patent: 5608404 (1997-03-01), Burns et al.
patent: 5943006 (1999-08-01), Crane et al.
Copy of European Patent Office Communication for European Patent Application No. 99302116, including European Search Report dated Dec. 21, 1999.

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