Abstract
A Low-Profile Wideband LTCC Integrated Circularly Polarized Helical Antenna Array for Millimeter-Wave Applications
Highlights
Circularly polarized (CP) antennas are receiving more and more attention in millimeter-wave applications because of the suppression of the multipath reflection, reduction of the polarization mismatch, etc. [1], [2]
Helical antennas can exhibit good circular polarization, excellent directivity, high gain and wide bandwidth, which are required in many mmW applications
A planar helical antenna with low profile (0.11 wavelength at 10 GHz), wide impedance and axial ratio (AR) bandwidth operating at 10 GHz was investigated in [10]
Summary
Circularly polarized (CP) antennas are receiving more and more attention in millimeter-wave (mmW) applications because of the suppression of the multipath reflection, reduction of the polarization mismatch, etc. [1], [2]. Helical antennas can exhibit good circular polarization, excellent directivity, high gain and wide bandwidth, which are required in many mmW applications. [12] presents a small-size, low-profile, and low-cost helical antenna It works in normal mode, it cannot radiate circularly polarized wave. It should be noted that in [13] and [14], two low-temperature co-fired ceramic (LTCC) helical antenna arrays working at 60 and 94 GHz respectively with broadside radiation pattern and good circular polarization performance were reported. In order to achieve good circular polarization performance, more turns were used in these two helical antennas, the profile is still high (0.38 wavelength at 60 GHz in [13], 0.62 wavelength at 94 GHz [14]). DING, ET AL., A LOW-PROFILE WIDEBAND LTCC INTEGRATED CIRCULARLY POLARIZED HELICAL
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