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Z Theory of quasioptical antennas W V T Rusch A C Ludwig and W C Wong
antenna design and applications W V T Rusch T S Chu
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admittance amplitude aperture aperture antennas approximately axis bandwidth beamwidth boresight calculated Cassegrain Cassegrain antenna circular coefﬁcients components conical coordinate cross-polar curves cylindrical deﬁned diameter dielectric diffraction dipole direction distribution E-plane edge effect efﬁciency electric electromagnetic element pattern equations evaluation excitation factor far-ﬁeld feed ﬁeld ﬁrst focal Fourier frequency function gain geometry grating lobe ground plane H-plane horn IEEE IEEE Trans illumination impedance inﬁnite integration length lens linear main beam matrix measurements microstrip microstrip antenna microwave mode mutual coupling near-ﬁeld near-field region offset reﬂector orthogonal paraboloid parameters pattem phase error phased array phaser planar plane wave polarisation primary-feed probe propagation radiation pattern range ratio rectangular reﬂected reflector reﬂector antennas region resonant scan angle Section shown in Fig sidelobe signal slot space speciﬁed spherical wave subreﬂector surface symmetric taper technique test antenna vector VSWR waveguide wavelength zero