Abstract: A method for optimally siting cosine-squared antennas in an array is taught, along with the array which is produced by use of the array. The array in question utilizes a dense hexagonal cellular grid, and each individual antenna is assigned a frequency group on which the antenna operates. The cells are ordered in such a fashion as to keep co-channel interference to a minimum.

Abstract: A non-directional transmitting system non-directionally and simultaneously transmits four signals of different but closely spaced frequency. The system comprises four directional antennas, each oriented to face in a different respective direction, each direction being spaced 90.degree. from the next one. Each directional antenna simultaneously transmits one fourth of the power of each one of the four signals, making for an overall non-directional effect. The four signal sources are coupled to the four directional antennas by way of four 3-dB couplers in such a way that substantially all the power of each signal is transmitted equally to the four directional antennas, avoiding the power loss customary when plural signal sources are coupled to a common non-directional antenna using 3-dB couplers.