Patent ID: 11942698
Assignee: CITY UNIVERSITY OF HONG KONG
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A dual-band HP 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 the second omnidirectional loop antenna comprises an Alford loop excited by a plurality of radial arms; the plurality of radial arms connected to a feeding probe at the center of Alford loop and each of the plurality of radial arms comprising a meander structure.