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A 360deg phase shifter using a tunable quasi-lumped hybrid coupler was successfully designed. The phase shifter circuit delivers two evenly-split signals phase shifted over a 368deg controllable range. The phase shifter was connected to an antenna array made with two printed patches. The feasibility of pattern reconfiguration was validated by the Sij- and radiation pattern measurements.
This letter presents a planar omnidirectional antenna structure with wide beam for applications in the 60-GHz band. The antenna was designed using only one metal layer on top of a quartz substrate, which is very cost efficient. The optimal structure, of size 4.5 times 4.3 mm2, exhibits a gain of 1.4 dBi plusmn 0.5 dBi in the omnidirectional plane and a half power beam width of about 75 deg in the...
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