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Several types of diffraction type
antennas
On the base of the
obtained experience in the planar diffraction type antennas
development several types of fixed beam, electrically scanning (due
to frequency sweeping) and electro-mechanically scanning antennas
may be separately developed for various applications with desirable
parameters and in any specified frequency band (Ku, Ka, V, W). Some
examples of already developed 2D diffraction type antennas are
listed below.
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W-band 2D diffraction type antenna with aperture size 250x250 mm. For single frequency a single-beam pattern is realized. For multi-channel passive system multi-beam pattern is realized in X-axis. Round multi-beam scanning may be realized in passive mode due to antenna rotation. |
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W-band electro-mechanically scanning diffraction type antenna. Scanning at Y axis is realized due to reciprocal turning of the disc with diffraction grating around its axis. Aperture size is 400 mm in diameter. Sector of disk turning is +/- 15 degrees, beam inclination is +/- 20 degrees. For single frequency a single-beam pattern is realized in X-axis. For multi-channel passive system scanning multi-beam pattern is realized. Turning is realized due to step motor drive with speed = 1 cycle per second, so scanning rate is 2 scans per second (up and down). |
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Ka-band 2D-radar single-beam planar antenna with azimuth rotation. Aperture size is 2000x180 mm. |
