US 12,267,947 B2
Wiring board, electronic module, and electronic apparatus
Makoto Aoki, Tokyo (JP); Tomohisa Ishigami, Kanagawa (JP); and Yu Ogawa, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 1, 2022, as Appl. No. 17/829,398.
Claims priority of application No. 2021-097003 (JP), filed on Jun. 10, 2021; and application No. 2022-072225 (JP), filed on Apr. 26, 2022.
Prior Publication US 2022/0400547 A1, Dec. 15, 2022
Int. Cl. H05K 1/02 (2006.01); H04N 23/52 (2023.01); H05K 1/18 (2006.01); H01R 12/79 (2011.01)
CPC H05K 1/0224 (2013.01) [H04N 23/52 (2023.01); H05K 1/0219 (2013.01); H05K 1/189 (2013.01); H01R 12/79 (2013.01); H05K 2201/042 (2013.01); H05K 2201/0715 (2013.01); H05K 2201/09236 (2013.01); H05K 2201/09254 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wiring board comprising:
a signal line including a first end connected to a signal transmitting side and a second end connected to a signal receiving side;
a shield member including a main surface that overlaps with the signal line in a direction perpendicular to the main surface; and
a branch line that is electrically connected to the shield member, the branch line including a leading end that is open,
wherein the branch line is disposed closer to the first end of the signal line than to the second end of the signal line, and
wherein the branch line is disposed such that the leading end of the branch line faces the signal transmitting side on which the first end of the signal line is positioned,
wherein

OG Complex Work Unit Math
is satisfied, where L is a length of the branch line, f is a frequency, c is a speed of light, and εr is an effective relative dielectric constant, and the frequency is in a range equal to or greater than 700 MHz and equal to or less than 66 GHz.