US 12,272,882 B2
Directional antenna and communication device
Min Yu, Chengdu (CN); Xin Luo, Chengdu (CN); Yuping Shu, Shenzhen (CN); and Yi Chen, Chengdu (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Mar. 23, 2022, as Appl. No. 17/701,802.
Application 17/701,802 is a continuation of application No. PCT/CN2020/116346, filed on Sep. 19, 2020.
Claims priority of application No. 201910927624.0 (CN), filed on Sep. 27, 2019.
Prior Publication US 2022/0216606 A1, Jul. 7, 2022
Int. Cl. H01Q 3/44 (2006.01); H01Q 1/38 (2006.01); H01Q 1/48 (2006.01); H01Q 3/36 (2006.01); H01Q 5/314 (2015.01); H01Q 15/14 (2006.01); H01Q 19/10 (2006.01)
CPC H01Q 3/44 (2013.01) [H01Q 5/314 (2015.01); H01Q 15/14 (2013.01); H01Q 19/10 (2013.01); H01Q 1/38 (2013.01); H01Q 1/48 (2013.01); H01Q 3/36 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A directional antenna, comprising an active element and a first reflector, wherein
the active element comprises a first element and a second element, an operating frequency band of the first element is a first frequency band, and an operating frequency band of the second element is a second frequency band;
an equivalent electrical length of the first reflector is equal to or slightly greater than one half of a wavelength of the first frequency band; and
the first reflector comprises a first resonant circuit, the first resonant circuit comprises a first capacitive part and a first inductive part that are connected in parallel, a resonance frequency of the first resonant circuit is within the second frequency band, and an equivalent electrical length of a part other than the first resonant circuit in the first reflector is less than one half of a wavelength of the second frequency band.