Antenna & Wave Propagation

For a charge with no motion For a charge moving with uniform velocity with straight & infinite wire For a charge oscillating in time motion All of the above Minor lobe Side lobe Back lobe None of the above Half power beam width (HPBW) First null beam width (FNBW) Side lobe level (SLL) Front to back ratio (FBR) Increase Decrease Stability None of the above Spherical Dough-nut Elliptical Hyperbolic α < βd α > βd α = ±βd α ≠ ±βd Ionospheric Ground wave Tropospheric All of the above VHF SHF UHF All of the above Power delivered to antenna Power factor of impedance Both a and b None of the above Surface wave Space wave Both a & b None of the above Aperture Microstrip Array Lens Plane to spherical wave Spherical to plane wave Both a and b None of the above Reactive near-field region Fresnel region Fraunhofer region All of the above Point angle Linear angle Plane angle Solid angle R + c R – c R/c R x c High efficiency Low side lobes Large signal to noise ratio Lone of the mentioned 330 660 12000 None of the mentioned 450 900 1800 1200 Beam area Effective area Aperture area Beam efficiency Half power beam width Full null beam width Beam width None of the mentioned