In this paper, a compact dual-band circularly polarized stacked patch antenna is investigated for the satellite terminal devices, including Beidou, GPS and GLONASS satellite navigation and positioning systems. The proposed antenna resonates in dual-band, covering B31-band (1268.52±10.23 MHz)., B11-band (1561.098±10.23 MHz)., B1C/L1C-band (1575.42±10.23 MHz)., G1-band (1602±5 MHz). The right-handed circular polarization (RHCP) is realized by two orthogonal feeding probes., which are connected to a broadband triple-branch-line 90° coupler as the feeding network. The antenna size is shrunk by utilizing the ceramic substrates with the high dielectric constant values., also the compact feeding network with the multilayer structure using vertical transitions between different stripline layers. Moreover., a cylindrical box-shaped polyphenylene sulfide (PPS) radome is presented. The proposed antenna has a 14 mm (0.075λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</inf> ) height and a 71 mm x 71 mm (0.38λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</inf> x 0.38λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</inf> at 1.57542 GHz) dimension without the radome. Within the operating frequency band mentioned above, the simulated axial-ratio (AR) in the normal direction is less than 2dB. The maximum RHCP gain of the proposed antenna is 3.5 dBic and 5.2 dBic for the lower and higher band, respectively.
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Liang et al. (2024) studied this question.
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