HF radar
AssigneeAlenia Marconi Systems Limited
InventorKen Perry
Life of this patent
Estimating the term…
Abstract
A HF radar uses the same antenna array (414, 424, 424′, 424′) for both transmission (TX) and reception (RX). Each radiating element of the array may be driven by its own local transmitter and may have its own local receiver, both being connected to a central processor via fiber optic cables conveying digital data to the local transmitter relating to element energization in the TX mode and data representing signals received by the radiating elements in the RX mode. Each antenna element may have its own TX/RX unit, or a single TX/RX unit may serve two or more radiating elements. Each radiating element may comprise a skeletal pyramidal dipole mounted at ground level.
Claims5
A high frequency (HF) radar installation, comprising:
- a) a transmit/receive antenna having an array of antenna elements, each antenna element comprising a dipole antenna including first and second skeletal pyramids disposed such that an apex of one of the pyramids is adjacent to an apex of the other of the pyramids, the pyramids having at least individual edges comprising electrically conductive members, and stay means for maintaining the conductive members in a predetermined spatial relationship with each other;
- and
- b) a plurality of transmit/receive assemblies, each assembly including, for each antenna element, a power transmitter for generating radio frequency signals, a receiver for receiving radio frequency signals, and a duplexer for coupling an output of the power transmitter and an input of the receiver to a common port to the transmit/receive antenna.
Dependencies are inferred from the claim text.