Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1990-01-05
1991-06-11
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342157, H01Q 322, H01Q 324
Patent
active
050236342
ABSTRACT:
An antenna system comprises a plurality of element antennas for both transmission and reception of signals, which are constituted on an optical profile surface and are divided into a plurality of blocks, each including at least more than two element antennas; a plurality of miniature transmitters/receivers connected respectively to the plurality of element antennas, which are adapted to switch between a transmission mode and a reception mode, to control the phase shift of transmission signals and amplify the controlled transmission signals in the transmission mode or to control the phase shift of reception signals and amplify the controlled reception signals; a plurality of power supply circuits connected respectively to the plurality of blocks, each of which is adapted to distribute the transmission signals to the corresponding block, or to synthesize the reception signal from the corresponding block; a plurality of reception signal converting units connected respectively to the plurality of power supply circuits each of which comprises a transmission signal/reception signal switching unit, a frequency converter, a band-pass filter, an analog/digital converter and an electro/optical converter, which are connected in series, so as to output optical digital signals of the reception signals; and a signal processing unit responsive to the optical digital signals for calculating the required antenna performance.
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Inami Kazuyoshi
Kawano Hazime
Nishioka Yasuhiko
Blum Theodore M.
Mitsubishi Denki & Kabushiki Kaisha
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