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

Claim 0:
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.