Two-dimensional beamforming networks on the basis of coupled waveguides

One-dimensional dual-polarization beamforming networks based on coupled metal waveguides

“…It is of interest to com pare these results with the results obtained with the use of the theory of coupled waves [8]. This theory was effi ciently used in [8][9][10] for the analysis of a periodic structure, which is finite along the 0z axis. In the sim plest case, when only distributed coupling of adjacent waveguides is considered, the dependence of slowing factor U on parameter αa has the following form:…”

“…Note that first order LCCs of the modes with different polarization planes have dif ferent signs. This difference may be very important for operation of the BFN, because designs considered in [9][10][11] ensure attainment of the desired result under the condition of a positive LCC.…”

“…For solution of this problem, we will use the theory of coupled waves, as it was made in [8][9][10]. The layout of the structure under study is shown in Fig.…”

“…This BFN can be formed with the help of open trans mission lines and waveguides with surface waves: dielectric waveguides, helix lines, striplines, and slot lines. Various modifications of 1D and 2D BFNs on the basis of waveguides with distributed coupling are con sidered in [9][10][11].…”