Actual values vary with the specific installation.
Contact us with details of your installation if more precise values are needed. Our gain figures are calculated by factoring the directivity to allow for losses in the radiating system. Due to this conservative approach, you are assured of radiating maximum ERP by using Shively's published gain figures. Gain is provided for one polarization and is equal in circularly polarized antennas for both horizontal and vertical components. Antenna radiation aperture is the distance from the center of the top bay to the center of the bottom bay.