US 11,855,358 B2
Planar antenna
Minghui Dai, Shanghai (CN); Jiangsong Zhang, Shanghai (CN); and Xiao Sun, Shanghai (CN)
Assigned to Flex, Ltd., Singapore (SG)
Filed by Flex Ltd., Singapore (SG)
Filed on May 25, 2022, as Appl. No. 17/824,346.
Application 17/824,346 is a continuation of application No. 16/290,568, filed on Mar. 1, 2019, granted, now 11,355,865.
Claims priority of application No. 201810016135.5 (CN), filed on Jan. 8, 2018.
Prior Publication US 2022/0285856 A1, Sep. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01Q 21/24 (2006.01); H01Q 9/04 (2006.01); H01Q 7/00 (2006.01); H01Q 1/38 (2006.01); H04B 5/00 (2006.01); H01F 27/36 (2006.01)
CPC H01Q 21/24 (2013.01) [H01F 27/366 (2020.08); H01Q 1/38 (2013.01); H01Q 7/00 (2013.01); H01Q 9/0407 (2013.01); H04B 5/0081 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A planar antenna, comprising:
a coil, comprising:
a first turn in a first layer; and
a first tip; and
a first high permeability object positioned in proximity to the first tip, wherein the first high permeability object includes a first section, a second section, and a third section between the first section and the second section, wherein the third section is recessed from the first section and the second section and accommodates the coil, wherein the first section surrounds the coil, wherein the second section is surrounded by the coil, and wherein the second section comprises an uninterrupted top surface that spans over an entire top of the second section.