WIDEBAND RADIATING ELEMENTS

摘要

Wideband radiating elements (100, 200, 300, 400), methods of transmitting and receiving signals using a wideband radiating element (100, 200, 300, 400), standalone antennas, and array antennas are disclosed. The wideband radiating element (antenna) (100, 200, 300, 400) has wide bandwidth for a relatively constant beamwidth and comprises a section of waveguide (130, 230, 330, 430), a patch radiator (110, 210, 310, 410), and one or more tuned loops (128, 228, 328, 428). The waveguide section (130, 230, 330, 430) is a quarter of a guide wavelength long or thereabouts, short circuited at one end (132, 232, 332, 432), and open circuited at the other end (134). The patch radiator (110, 210, 310, 410) is disposed within the waveguide section (130, 230, 330, 430). The tuned loops (128, 228, 328, 428) are coupled to the patch radiator (110, 210, 310, 410) as a feed for the patch radiator (110, 210, 310, 410) in a plane normal to the patch radiator (110, 210, 310, 410). The width of the waveguide section (130, 230, 330, 430) may be between about 0.7 wavelengths and about 1.3 wavelengths and the patch (110, 210, 310, 410) may be located at a height of 0.125 wavelengths or thereabouts above the short-circuited end (132, 232, 332, 432) of the waveguide section (130, 230, 330, 430).