An Investigation of Nontraditional Phased Array Components

In this paper, the topologies of the two-channel dual-band terminal-fed printed dipole antenna equipped with a ring coupler, dual-band dipole antenna with the stepped-width conductors, and dipole antenna array equipped with Butler matrix are reported. In this initial design, a coupler and the radiators are placed above an integrated balancing unit (balun) so that a balun transforms terminal-fed dipole input impedance and impedance of a coupler. A ring power coupler is used for allowing feeding dipoles from different ports. So if it is done, then it is possible to form sum and difference radiation patterns (RP) in one integrated module so that it could be used when constructing more complex antenna systems.The realized isolation between sum and difference channels is better than -20 dB over 350 MHz frequency band. The frequency bands of the sum and difference channels overlap frequency band of a ring coupler.The proposed in the second section printed arrangement increases the frequency distance between the lower and higher working bands in comparison with the dual-band antenna on a base of classical center-fed dipoles which was described in Russian Patent no. 2 432 646 published 27.10.2011.The eight-element dipole antenna array, presented in the last section, comprise Butler matrix in order to form eight independent beams.