7Search.cceffective aperture of antenna derivationeffective aperture of antenna derivationdefine effective aperture of antennaeffective aperture of antennaeffective aperture of antenna formulaaperture of an antennaeffective aperture area of antennaaperture efficiency of antennawhat is an antenna apertureaperture area of antennaaperture meaning in antennaantenna gain and aperture areaexamples for antenna with circular aperture