Parametric Study of a Wideband Endfire Circularly Polarized Antenna for Millimeter-wave Applications

In this paper, a wideband circularly polarized (CP) antenna element using substrate integrated waveguide technology is proposed at millimeter-wave (mmW) frequencies. The presented CP element is composed by a vertical metallic tapered slot antenna (TSA) and a horizontal printed dipole. A parametric analysis was carried out, in order to investigate the effects on far-field radiation fields caused by metallic TSA. For proof-of-concept demonstration, a CP element was fabricated and measured, showing a reasonable agreement with simulated ones. Due to its advantage of low-profile feeding structure, wideband, ease of integration, the presented CP element is a promising choice for mmW wireless applications.

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