US 11,855,354 B2
Microstrip antenna and information apparatus
Minoru Furukawa, Kyoto (JP); and Zhewang Ma, Saitama (JP)
Assigned to Space Power Technologies Inc., Kyoto (JP)
Filed by Space Power Technologies Inc., Kyoto (JP)
Filed on Oct. 5, 2021, as Appl. No. 17/494,237.
Application 17/494,237 is a continuation of application No. PCT/JP2020/035353, filed on Sep. 17, 2020.
Claims priority of application No. 2019-210671 (JP), filed on Nov. 21, 2019.
Prior Publication US 2022/0029306 A1, Jan. 27, 2022
Int. Cl. H01Q 21/06 (2006.01); H01Q 13/08 (2006.01)
CPC H01Q 21/065 (2013.01) [H01Q 13/08 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A microstrip antenna corresponding to a rectangular resonator, the rectangular resonator having:
a first side and a second side being parallel to a first direction and having a length corresponding to 3/2 wavelength; and
a third side and a fourth side being parallel to a second direction orthogonal to the first direction, the rectangular resonator having a shape notched from each of the first side and the second side toward a center of the rectangular resonator,
the microstrip antenna comprising:
a first portion constituting a periphery of the notched shape; and
a second portion and a third portion facing each other across the first portion,
the notched shape allowing the first portion to contribute to a radiation characteristic for the second portion and the third portion,
the first portion, the second portion, and the third portion each having a length corresponding to ½ wavelength in the first direction,
the first portion having a width in the second direction that is narrower because of the notched shape than a width of the second portion and the third portion in the second direction, and
either the second portion or the third portion being provided with a feeding point.