Antenna with absorptive radiation shield

摘要

An antenna (100) includes a radiating element (202) covered with a protective jacket having at least one pocket selectively located therein. The at least one pocket (102) is filled with a material (105) having an absorptive index substantially higher than the index of the protective jacket (102). This material imposes substantial restriction to the free radiation of radio frequency energy. Conversely, the remainder of the jacket (102) with no pockets provides for the unrestricted radiation of the radio frequency energy therethrough. As a result the antenna (100) directionally radiates energy without the use of reflectors or additional radiating elements.