Topics Dipole • Cup Dipole Folded Dipole Step up Ratio ► Small ► Large • Short Dipole Resistance Directivity • Aperture ► Circular • Central blockage loss • Blockage sidelobes • Circular Aperture Nomograph • Quadratic Phase Loss ► Square • Beam broadening from taper • Quadratic Phase Loss ► Unequal beamwidth nomograph • Omnidirectional • Widebeam ► Cardiod ► cosN(θ) ► Gaussian ► Unequal Beamwidths narrow ► Unequal Beamwidths wide • Horn downloads • Circular ► Axially Corrugated ► Axially+Radial Corrugations ► Cup Horn ►Potter Horn ►Satoh Horn ► Scrimp Horn ►Turrin Horn • Rectangular ► Rectangular horn efficiencies ► Optimum designs ► Small optimum designs Measurement • Circular Polarized Gain Factor • Multipath ripple • Angular ripple to distance • Dual Pol. Emax error • Dual Pol. Emin error • Near-field measurement correction • Metal frame radome •Patch Directivity Polarization • Axial ratio to CP X-pol • Axial ratio to pol. loss • Ludwig chart • Max-Min pol. loss • Path Loss Adj. for CP Gains • Axial ratio to inverse axial ratio Reflectors – General Aspects • Geometry • Subtended angle scale • Optimum feed beamwidth • Feed mismatch factor • Axial defocusing factor • Surface tolerance (cm) loss • Surface tolerance (in) loss • Subreflector tolerance factors • Skin depth nomograph • Reflectors – canonical • Prime focus • Offset fed • Cassegrain – symmetrical • Gregorian – symmetrical • Cassegrain – offset • Gregorian – offset • Open Cassegrain • Inverse Cassegrain • Dragonian • Displaced Axis Reflector • Generalized Dual Reflector Transmission line • Return loss to reflected power loss • VSWR to reflected power loss • Return loss to VSWR • Peak voltage due to VSWR • Power de-rating due to VSWR
Reflectors – canonical
