1974 International IEEE/AP-S Symposium Program & Digest: June 10-12, 1974, Georgia Institute of Technology, Atlanta, Georgia |
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Page 73
... ratio is ≤2 dB for both frequency bands . The radiated axial ratio is slightly degraded from the polar- izer data given in Figure 4. In a circularly polarized system the unterminated post polarizer mismatches appear as a degradation of ...
... ratio is ≤2 dB for both frequency bands . The radiated axial ratio is slightly degraded from the polar- izer data given in Figure 4. In a circularly polarized system the unterminated post polarizer mismatches appear as a degradation of ...
Page 77
... RATIO ( dB ) 8 AXIAL RATIO AXIAL LENGTH ( WAVELENGTHS ) PEAK AXIAL RATIO OVER THE HEMISPHERE IN FRONT OF THE HELIX PEAK AXIAL RATIO OVER THE 3 db BEAMWIDTH OF THE HELIX RESONANT HELIX PERFORMANCE Lele A / 2 N = 1 / 2 FIGURE 3 5dt 25 30 ...
... RATIO ( dB ) 8 AXIAL RATIO AXIAL LENGTH ( WAVELENGTHS ) PEAK AXIAL RATIO OVER THE HEMISPHERE IN FRONT OF THE HELIX PEAK AXIAL RATIO OVER THE 3 db BEAMWIDTH OF THE HELIX RESONANT HELIX PERFORMANCE Lele A / 2 N = 1 / 2 FIGURE 3 5dt 25 30 ...
Page 249
... ratio in every direction of the beam , that is , good ICR ( Inte- grated Cancellation Ratio ) [ 2 ] , because the axial ratio of the horn used as the feed is not good within the solid angle subtended by the reflector over the wide ...
... ratio in every direction of the beam , that is , good ICR ( Inte- grated Cancellation Ratio ) [ 2 ] , because the axial ratio of the horn used as the feed is not good within the solid angle subtended by the reflector over the wide ...
Contents
1005 | 5 |
1345 | 11 |
Radiation by an Electric Line Source Parallel to a Critical Coupling Layer | 18 |
Copyright | |
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Common terms and phrases
amplitude antenna pattern antenna system Antennas and Propagation aperture approximately axial axis azimuth balun band bandwidth beam beamwidth bifilar blockage calculated circuit coefficients components configuration cross polarization current distribution curve cylinder dielectric diffraction dipole E-plane electromagnetic elements error experimental far-field feed feed horn focal free space frequency function gain ground plane H-plane horizontal horn IEEE IEEE Trans inch incident integral equation length linear lobe magnetic method Microwave mode modules monopole near-field measurement numerical obtained offset orthogonal output paraboloidal parameters performance phase shifter phased array planar plane wave probe problem quadrifilar radar radiation pattern range ratio receiver reflected reflector antenna region relative resonant S-band SCAN ANGLE scattering shown in Figure sidelobe signal slot solution spherical spherical reflector structure surface target technique theory tion transmit values voltage VSWR waveguide wavelength wire