Planar Antenna Arrays Using Feed Networks with Nonradiative Dielectric (NRD) Waveguide

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This thesis deals with the investigation and development of low profile, low loss
antennas with emphasis on reduced cost implementations for different commu-
nication and radar applications in the microwave and millimeter-wave region.
All antennas investigated in this work are implemented in the K-band (18 GHz–
26.5 GHz) as for this frequency range measurement facilities and power ampli-
fiers were readily available, but actually they lend themselves for applications in
the mm-wave range where the low loss characteristic of the NRD-guide is even
more pronounced.