US 12,470,242 B2
Transmitting or receiving circularly polarized signals by linearly polarized antennas
Shao-Chou Hung, Hsinchu (TW); Bao-Chi Peng, Hsinchu (TW); Chun-Chia Chen, Hsinchu (TW); I-Kang Fu, Hsinchu (TW); Abdelkader Medles, Cambridge (GB); and Gilles Charbit, Cambridge (GB)
Assigned to MEDIATEK INC., Hsinchu (TW)
Filed by MEDIATEK INC., Hsinchu (TW)
Filed on Apr. 12, 2023, as Appl. No. 18/299,162.
Claims priority of provisional application 63/330,339, filed on Apr. 13, 2022.
Claims priority of provisional application 63/330,340, filed on Apr. 13, 2022.
Claims priority of provisional application 63/330,341, filed on Apr. 13, 2022.
Prior Publication US 2023/0335914 A1, Oct. 19, 2023
Int. Cl. H04B 1/16 (2006.01); H01Q 3/24 (2006.01); H01Q 15/24 (2006.01)
CPC H04B 1/1638 (2013.01) [H01Q 3/24 (2013.01); H01Q 15/244 (2013.01); H01Q 15/246 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for transmitting a circularly polarized signal by linearly polarized antennas, the method comprising:
receiving, by a horizontally polarized antenna and a vertically polarized antenna of an apparatus, a first circularly polarized signal that is transmitted based on a transmitted baseband signal vector;
generating, by a radio frequency (RF) module of the apparatus, a received baseband signal vector based on the received first circularly polarized signal, the received baseband signal vector including a product of the transmitted baseband signal vector and a receiving polarization vector of the transmitted baseband signal vector;
estimating, by processing circuitry of the apparatus, the receiving polarization vector of the transmitted baseband signal vector based on the received baseband signal vector;
calibrating, by the processing circuitry of the apparatus, power amplifiers (PAs) and local oscillator (LO) signals of frequency converters in the RF module based on the estimated receiving polarization vector; and
transmitting, by the horizontally polarized antenna and the vertically polarized antenna of the apparatus, a second circularly polarized signal based on the calibrated PAs and the calibrated LO signals of the frequency converters in the RF module.