US 11,942,698 B2
Electrically small, planar, horizontally polarized dual-band omnidirectional antenna
Kwok Wa Leung, Kowloon Tong (HK); Peng Fei Hu, Kowloon Tong (HK); Yong Mei Pan, Guangzhou (CN); and Shao Yong Zheng, Guangzhou (CN)
Assigned to City University of Hong Kong, Kowloon (HK)
Filed by City University of Hong Kong, Kowloon (HK)
Filed on Mar. 3, 2022, as Appl. No. 17/685,777.
Claims priority of provisional application 63/163,416, filed on Mar. 19, 2021.
Prior Publication US 2022/0302587 A1, Sep. 22, 2022
Int. Cl. H01Q 7/00 (2006.01); H01Q 5/307 (2015.01); H01Q 5/378 (2015.01); H01Q 9/28 (2006.01); H01Q 21/20 (2006.01); H01Q 21/28 (2006.01)
CPC H01Q 5/307 (2015.01) [H01Q 5/378 (2015.01); H01Q 7/00 (2013.01); H01Q 9/285 (2013.01); H01Q 21/205 (2013.01); H01Q 21/28 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A dual-band horizontally polarized omnidirectional antenna, comprising:
a) an electrically small (ES) first omnidirectional loop antenna for a first band; and
b) a second omnidirectional loop antenna for a second band;
wherein the first omnidirectional loop antenna and the second omnidirectional loop antenna are capable of operating independently in the first band and the second band; and
a loading effect of the second omnidirectional loop antenna adapted to suppress a higher-order mode of the first omnidirectional loop antenna;
wherein the first omnidirectional loop antenna and the second omnidirectional loop antenna are configured respectively on opposite sides of a substrate;
wherein an ES loop of the first omnidirectional loop antenna is divided into a plurality of segments each of which is excited by a corresponding radial strip; the radial strips connected to a central patch; the plurality of segments divided by four interlaced coupling slots that provide capacitive loadings.