Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements

HELECTRICITY H01Electric elements H01QAERIALS

H01Q9/00Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements

H01Q9/005for radiating non-sinusoidal waves H01Q9/02Non-resonant aerials H01Q9/04Resonant aerials H01Q9/0407Substantially flat resonant element parallel to ground plane H01Q9/0414in a stacked or folded configuration H01Q9/0421with a shorting wall or a shorting pin at one end of the element H01Q9/0428radiating a circular polarised wave H01Q9/0435using two feed points H01Q9/0442with particular tuning means H01Q9/045with particular feeding means H01Q9/0457electromagnetically coupled to the feed line H01Q9/0464Annular ring patch H01Q9/0471Non-planar, stepped or wedge-shaped patch H01Q9/0478with means for suppressing spurious modes H01Q9/0485Dielectric resonator antennas H01Q9/0492circularly polarised H01Q9/06Details H01Q9/065Microstrip dipole antennas H01Q9/08Junction boxes specially adapted for supporting adjacent ends of collinear rigid elements H01Q9/10Junction boxes specially adapted for supporting adjacent ends of divergent elements H01Q9/12adapted for adjustment of angle between elements H01Q9/14Length of element or elements adjustable H01Q9/145by varying the electrical length H01Q9/16with feed intermediate between the extremities of the aerial H01Q9/18Vertical disposition of the aerial H01Q9/20Two collinear substantially straight active elements Substantially straight single active elements H01Q9/22Rigid rod or equivalent tubular element or elements H01Q9/24Shunt feed arrangements to single active elements H01Q9/26with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength H01Q9/265Open ring dipoles; Circular dipoles H01Q9/27Spiral aerials H01Q9/28Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines H01Q9/285Planar dipole H01Q9/30with feed to end of elongated active element H01Q9/32Vertical arrangement of element H01Q9/34Mast, tower, or like self-supporting or stay-supported aerials H01Q9/36with top loading H01Q9/38with counterpoise H01Q9/40Element having extended radiating surface H01Q9/42with folded element, the folded parts being spaced apart a small fraction of the operating wavelength H01Q9/43Scimitar aerials H01Q9/44with plurality of divergent straight elements H01Q9/46with rigid elements diverging from single point