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Millimeter-Wave Dual-Polarized High-Isolation Antennas and Arrays on Organic Substrates

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5 Author(s)
Chieh, J.-C.S. ; Spawar Syst. Center San Diego, San Diego, CA, USA ; Pham, B. ; Pham, A.-V. ; Kannell, G.
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We present the design and development of dual-polarized aperture coupled stacked patch antennas with substrate embedded air cavities. The antennas, targeted for operation in the W-band (75 - 110 GHz), are realized in a multilayer organic hybrid substrate utilizing both Kapton and liquid crystal polymer (LCP). Balanced and unbalanced feedlines are investigated in order to improve isolation and mitigate coupling between orthogonal polarized ports. Measured results for the single antenna element show good performance with a beamwidth of 90 ° and a 2.6:1 VSWR bandwidth of 23 GHz, and isolation of better than 17.8 dB. An eight-element linear array is also designed, fabricated and tested. The antenna array achieves a beamwidth of 13 ° with a 2.3:1 VSWR bandwidth of 7.2 GHz. Pattern measurements were achieved utilizing a millimeter-wave diode detector circuit implemented directly on the antenna substrate.

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Antennas and Propagation, IEEE Transactions on  (Volume:61 ,  Issue: 12 )