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Integrated 60-GHz LTCC circularly polarized antenna array

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4 Author(s)
Sun, M. ; Inst. for Infocomm Res., Singapore, Singapore ; Guo, Y.X. ; Karim, M.F. ; Ong, L.C.

A 60-GHz wideband circular polarized (CP) patch array of 4×4 elements is designed and fabricated in low temperature cofired ceramic (LTCC) technology. By applying a strip line sequential rotation feeding scheme this array exhibits wide impedance bandwidth (VSWR<2) and 3-dB axial ratio (AR) bandwidth, both over 8 GHz. In addition, it exhibits a peak gain of 16.8 dBi and a beam-shaped pattern with a 3-dB beam width of 20°. With a grounded co-planar waveguide (GCPW) to strip line (SL) transition added to facilitate the testing, the array performance is not degraded except of a 0.6-dB peak gain penalty. The fabricated antenna sample measures 13×18.7×1.4 mm3. The wireless test is finally conducted to demonstrate the CP characteristic and wide impedance bandwidth over 8 GHz (VSWR<2) of this antenna.

Published in:

Radio-Frequency Integration Technology, 2009. RFIT 2009. IEEE International Symposium on

Date of Conference:

Jan. 9 2009-Dec. 11 2009