Perspectives of use of three-layer ferrite-dielectric waveguides for creation of integrated antennas with narrow beam

In this report, data of experimental research of three-layer ferrite-dielectric waveguides (FDW) in the millimeter wave band has been represented. These waveguides are the basis of integrated phased arrays (IPA) with electrical control of beam position. The IPA itself is founded on a travelling wave antenna principle. The maximum size of such an antenna is determined by losses in the waveguide. The level of these losses for the main FDW mode has been experimentally measured. It appears to be in the range of 0.25-0.27 dB/cm, which is 30% less than values obtained earlier. It is experimentally established that in existing samples of IPA up to 30% of RF power is radiated by the feeding transition. These facts open perspectives for creation of IPA with beamwidths of 1.3-1.5 degrees.