Array antenna
First Claim
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1. An array antenna comprising:
- a plurality of antenna elements for generating orthogonal polarization;
a plurality of transmission/receipt circuits each being connected to said plurality of antenna elements and including a digital-to-analog converter and an analog-to-digital converter in a transmitting section and a receiving section, respectively;
a digital I/O (Input/Output) section for inputting or outputting a transmission/receipt digital signal for forming a transmission/receipt beam to or from said plurality of transmission/receipt circuits;
a transmission/receipt module comprising said digital I/O section and said plurality of transmission/receipt circuits;
a beam controller connected to said transmission/receipt module via a data bus for generate digital data for forming a desired transmission beam and for forming a plurality of receipt beams at the same time with a complex product sum calculator which is use to form a received beam; and
transmission amplitude control means for controlling transmission amplitudes of said plurality of antenna elements.
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Abstract
An array antenna for use in, e.g., a radar includes a plurality of pairs of vertical polarization antenna elements and horizontal polarization antenna elements. A particular transmission/receipt module is connected to each pair of vertical and horizontal polarization antenna elements. A beam controller forms a transmission/receipt digital beam while a local signal generator controls a transmission/receipt frequency. The beam controller is connected to the transmission/receipt modules via a data bus and I/O (Input/Output) sections included in the modules.
36 Citations
5 Claims
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1. An array antenna comprising:
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a plurality of antenna elements for generating orthogonal polarization; a plurality of transmission/receipt circuits each being connected to said plurality of antenna elements and including a digital-to-analog converter and an analog-to-digital converter in a transmitting section and a receiving section, respectively; a digital I/O (Input/Output) section for inputting or outputting a transmission/receipt digital signal for forming a transmission/receipt beam to or from said plurality of transmission/receipt circuits; a transmission/receipt module comprising said digital I/O section and said plurality of transmission/receipt circuits; a beam controller connected to said transmission/receipt module via a data bus for generate digital data for forming a desired transmission beam and for forming a plurality of receipt beams at the same time with a complex product sum calculator which is use to form a received beam; and transmission amplitude control means for controlling transmission amplitudes of said plurality of antenna elements. - View Dependent Claims (2, 3, 4, 5)
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Specification