US 12,469,945 B2
Dielectric waveguide line
Hiroyuki Yoshimoto, Osaka (JP); Katsusada Tokuhira, Osaka (JP); and Taku Yamanaka, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Aug. 17, 2022, as Appl. No. 17/889,733.
Application 17/889,733 is a continuation of application No. PCT/JP2021/006402, filed on Feb. 19, 2021.
Claims priority of application No. 2020-027067 (JP), filed on Feb. 20, 2020.
Prior Publication US 2022/0407206 A1, Dec. 22, 2022
Int. Cl. H01P 3/16 (2006.01); C08F 14/26 (2006.01); H01P 1/20 (2006.01); H01P 3/12 (2006.01)
CPC H01P 3/16 (2013.01) [C08F 14/26 (2013.01); H01P 1/2002 (2013.01); H01P 3/12 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A dielectric waveguide comprising:
a center dielectric A1;
a dielectric layer A2 surrounding the center dielectric A1; and
a dielectric layer A3 surrounding the dielectric layer A2,
the center dielectric A1 comprising polytetrafluoroethylene,
the center dielectric A1, the dielectric layer A2, and the dielectric layer A3 having relative permittivities εA1, εA2, and εA3 at 25° C. and 6 GHz, respectively,
εA1, εA2, and εA3 satisfying the following: εA1 is 2.20 or lower; εA2 is 1.90 or lower; εA3 is 1.55 or lower; and εA1>εA2>εA3 is satisfied,
wherein a ratio εA2/εA1 of εA2 to εA1 is 0.65 to 0.95, and
a ratio εA3/εA2 of εA3 to εA2 is 0.65 to 0.95,
the specific gravity of the dielectric layer A2 is lower than the specific gravity of the center dielectric A1, and
the specific gravity of the dielectric layer A3 is lower than the specific gravity of the dielectric layer A2.