Back to results
US 6,144,339 AGranted
Array antenna
AssigneeNEC Corporation
InventorsKunio Matsumoto, Tsugio Yamazaki
Life of this patent
Estimating the term…
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.
Claims5
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.
4 more elements
Dependencies are inferred from the claim text.