TRIGGERED GENERATION OF NULLING SIGNALS TO NULL AN RF BEAM USING A DETACHABLE NULLING SUBASSEMBLY

摘要

A method and apparatus are provided for nulling a radio frequency (RF) beam for a high- altitude platform (HAP). A transmitter (425) generates an RF signal (602). A primary antenna system (410) generates an RF beam based on the RF signal (604). One or more processors (304) determine a result indicating whether to modify the RF beam. When the result indicates to modify the RF beam (606), a detachable nulling subassembly (415) generates nulling signals based on the RF signal to modify the RF beam generated by the primary antenna system (610).