US 12,218,394 B2
Power feed circuit comprising a synthesizing-distributing unit and a phase shifting unit configured for feeding a two point or a four point circularly polarized antenna
Yutaka Imamura, Tokyo (JP)
Assigned to HARADA INDUSTRY CO., LTD., Tokyo (JP)
Appl. No. 17/790,485
Filed by HARADA INDUSTRY CO., LTD., Tokyo (JP)
PCT Filed Nov. 9, 2020, PCT No. PCT/JP2020/041784
§ 371(c)(1), (2) Date Jun. 30, 2022,
PCT Pub. No. WO2021/140738, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 2020-000527 (JP), filed on Jan. 6, 2020.
Prior Publication US 2023/0044376 A1, Feb. 9, 2023
Int. Cl. H01P 1/17 (2006.01); H01P 5/16 (2006.01); H01Q 9/04 (2006.01); H01Q 15/24 (2006.01); H03F 3/60 (2006.01); H03H 7/18 (2006.01); H03H 7/48 (2006.01); H04B 1/18 (2006.01)
CPC H01P 1/17 (2013.01) [H01P 5/16 (2013.01); H01Q 9/0428 (2013.01); H01Q 15/244 (2013.01); H03F 3/60 (2013.01); H03H 7/185 (2013.01); H03H 7/48 (2013.01); H04B 1/18 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power feed circuit for feeding power to a circularly polarized antenna, the power feed circuit comprising:
a synthesizing-distributing unit that distributes input signals to two paths with the same phase and same amplitude; and
a phase shift unit that has two phase shift circuits connected respectively between the two paths distributed by the synthesizing-distributing unit and two feed points of the circularly polarized antenna and that outputs signals whose phase difference is 90° to the two feed points of the circularly polarized antenna, wherein
the phase shift unit is constituted by one of the phase shift circuits of the phase shift unit shifting the phase of a signal by −45°, and the other of the phase shift circuits of the phase shift unit shifting the phase of a signal by +45°.