Novel Four Cross Slot Radiator With Tuning Vias for Circularly Polarized SIW Linear Array

TitleNovel Four Cross Slot Radiator With Tuning Vias for Circularly Polarized SIW Linear Array
Publication TypeJournal Article
Year of Publication2014
AuthorsSanchez-Olivares, P., and J. L. Masa-Campos
JournalAntennas and Propagation, IEEE Transactions on
Date PublishedApril
Keywords16-element antenna prototype, antenna, Antenna measurements, antenna radiation patterns, array configuration, Arrays, circular polarization (CP), circularly polarized element, circularly polarized linear array, Couplings, four cross slot radiator, four cross tilted slots, frequency 17 GHz, frequency main beam tilt dispersion, linear antenna arrays, linear array, metallic vias, microwave antenna arrays, radiation efficiency, Reflection, single radiator, SIW linear array, slot, slot antenna arrays, substrate integrated waveguide, substrate integrated waveguide (SIW), substrate integrated waveguides, Substrates, Taylor distribution, Tuning, tuning via, tuning vias
AbstractA substrate integrated waveguide (SIW) linear array is presented with a new circularly polarized (CP) element. The single radiator consists of four cross tilted slots. In addition, a pair of tuning metallic vias is included to improve the reflection of longest slots. A 16-element antenna prototype with -26-dB Taylor distribution and 1.5% residual power was designed, manufactured and measured to verify the new slot performance in an array configuration. A 17-dB peak gain, 1.86-dB axial ratio and 80% radiation efficiency were experimentally achieved at 17 GHz. A 3% usable bandwidth was obtained owing to frequency main beam tilt dispersion.