US 12,451,603 B2
Multiband loop antenna
Stefan Gaier, Stuttgart (DE); and Matthias Lungwitz, Mössingen (DE)
Assigned to BSH Hausgeräte GmbH, Munich (DE)
Appl. No. 18/011,933
Filed by BSH Hausgeräte GmbH, Munich (DE)
PCT Filed Jul. 8, 2021, PCT No. PCT/EP2021/068996
§ 371(c)(1), (2) Date Dec. 21, 2022,
PCT Pub. No. WO2022/022976, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 10 2020 209 545.0 (DE), filed on Jul. 29, 2020.
Prior Publication US 2023/0246333 A1, Aug. 3, 2023
Int. Cl. H01Q 5/321 (2015.01); H01Q 1/22 (2006.01); H01Q 5/357 (2015.01); H01Q 5/378 (2015.01); H01Q 7/00 (2006.01)
CPC H01Q 5/321 (2015.01) [H01Q 1/22 (2013.01); H01Q 5/357 (2015.01); H01Q 5/378 (2015.01); H01Q 7/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A multiband loop antenna, comprising:
a circuit board having a first layer;
a first electrically conductive L-shaped partial structure disposed on said first layer of said circuit board, said first partial structure having a first resonance frequency, and said first partial structure having a feed in point of the antenna;
a second electrically conductive L-shaped partial structure disposed on said first layer of said circuit board, said second partial structure configured for a second resonance frequency;
said first partial structure and said second partial structure being capacitively coupled to one another in a coupling region;
an electrically conductive first reference region;
said first partial structure and said second partial structure disposed on said first layer of said circuit board together with said first reference region forming a loop;
said first partial structure having a first limb extending away or extending perpendicularly away from said first reference region;
said second partial structure having a first limb extending away or extending perpendicularly away from said first reference region;
said first partial structure having a second limb extending or extending perpendicularly relative to said first limb of said first partial structure, towards said second partial structure;
said second partial structure having a second limb extending or extending perpendicularly relative to said first limb of said second partial structure, towards said first partial structure;
said first partial structure having a transition region interconnecting said first and second limbs of said first partial structure, said transition region of said first partial structure having a first surface disposed at an angle relative to said first and second limbs of said first partial structure, and said first surface facing in a first direction;
said second partial structure having a transition region interconnecting said first and second limbs of said second partial structure, said transition region of said second partial structure having a second surface disposed at an angle relative to said first and second limbs of said second partial structure, and said second surface facing in a second direction opposite to said first direction.