Performance Comparison of Symmetric and Offset Reflector Antennas Adaptively Illuminated by Novel Triple Mode Feedhorn

Table 1

Peak copolarization gain and peak cross-polarization level (below peak gain) values at 7.73 GHz with the different mode combinations. The power to the individual mode is given in percentage.

Mode Combination	Peak Co-Pol Gain [dBi]	Peak Cross-Pol Level [dB]
TE11 (50%) + TM01 (50%) for +90^∘	35.18	−8.74
TE11 (50%) + TE21 (50%) for +90^∘	34.75	−11.75
TE11 (40%) + TM01 (30%) + TE21 (30%) for +90^∘	37.13	−15.2