US 12,255,397 B2
Antenna, electronic apparatus, and method of manufacturing an antenna
Toshihiro Sezai, Tokyo (JP)
Assigned to Japan Aerospace Exploration Agency, Tokyo (JP)
Appl. No. 17/907,566
Filed by JAPAN AEROSPACE EXPLORATION AGENCY, Tokyo (JP)
PCT Filed Mar. 10, 2022, PCT No. PCT/JP2022/010606
§ 371(c)(1), (2) Date Sep. 28, 2022,
PCT Pub. No. WO2022/249644, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 2021-089062 (JP), filed on May 27, 2021.
Prior Publication US 2024/0213686 A1, Jun. 27, 2024
Int. Cl. H01Q 15/16 (2006.01); H01Q 1/28 (2006.01); H01Q 15/14 (2006.01)
CPC H01Q 15/16 (2013.01) [H01Q 1/28 (2013.01); H01Q 15/141 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An antenna, comprising:
a primary radiator that radiates radio waves; and
a reflector mirror that reflects radio waves radiated from the primary radiator, has a same aperture diameter and height as a parabolic reflector mirror whose aperture diameter is equal to or less than 1.7 times a wavelength of the radio waves, and has a non-parabolic surface as a mirror surface shape,
wherein the primary radiator is disposed in a region inside an aperture plane of the reflector mirror,
wherein the reflector mirror has such pattern characteristics that no null points are generated in an antenna pattern on a hemisphere on which the radio waves are reflected and radiated, and
wherein the antenna is configured such that impedance characteristics of the primary radiator are changeable without changing a radiation pattern of the primary radiator.