Control ofAntenna BeamWidth

Several methods controlling antenna beam- efficiencies, lowlevels ofbackloberadiations, excellent widthsarebriefly proposed foraperture widthsimpedance matching andreasonable stabilities ofradiation approximately equal toonewavelength, which canbeused patterns. Compact designs allow utilizations attheworst asprimary feedstocreate thefanbeamsofradar environment conditions. Obviously, thehoghorn is antennas. Themouthmodifications canimprove the occasionally usedseparately without reflector. The radiation patterns andinput impedance matching. Itis hoghorn couldbeconsidered forsomespecial UWB possible tonarrowradiation pattern, andtherefore to applications (such asUWB radars), evenifantennas inthe increase thegain. Ontheother hand, similar modifications UWB communications frequency range arerequired almost areadvantageous fordualorthogonal polarization or omni-directional. Itcouldbenotedthatthedescribed octave frequency bandwidth operations ofaperturemethod hasbeenusedforthedesign ofcertain antennas for antennas suchashorns. Theproposed modifications have TamaraandVerapassive radars (multilateration systems) beenperformed forhoghorn. Themeasurements of forcivilian andmilitary air traffic control that improves the conventional andmodified hoghorn designs arecomparedaccuracy oftracking aircrafts (4), (5). indetail. Several methods controlling antenna beam-widths for aperture widths approximately equal toonewavelength are briefly proposed. Aperture methodcalculations arenot