Question: Use the data of Table 7.1 to show that the effective area of a rectangular or circular paraboloidal antenna is roughly equal to its geometrical

Use the data of Table 7.1 to show that the effective area of a rectangular or circular paraboloidal antenna is roughly equal to its geometrical area.

Table 7.1

HPBW (degrees) D (dB) Antenna type Sidelobes (dB) Notes Monopole Short dipole Half-wave dipole Six-element Yagi (iso) (i

HPBW (degrees) D (dB) Antenna type Sidelobes (dB) Notes Monopole Short dipole Half-wave dipole Six-element Yagi (iso) (iso) (none) (iso) (iso) 1.76 90 (none) 90 2.15 (none) -10 10.5 42 (iso) TV-antenna type 51(la) 51(/b) 11+10 log10 (abli?) Rectangular a, b are -13 sides of rectangle Circular paraboloid 72(ld) 72(ld) -10 +20 log10 d is -25 (dl 2) diameter

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