Antenna system with parasitic element for hearing aid compliant electromagnetic emission
US8605922B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2013 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Jun 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/42
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for production of an electromagnetic (EM) field having EM emissions mitigated at one or more predetermined locations within a Hearing Aid Compliant (HAC) measurement plane is provided. The EM field mitigation system includes a ground plane, an antenna element, and a parasitic resonator element. The antenna element is coupled to the ground plane and resonates within at least one predetermined frequency band for transmitting and receiving the radio frequency (RF) signals modulated at one or more frequencies within the at least one predetermined first frequency band. The parasitic resonator element includes at least a half-wavelength resonator portion floating above the ground plane and a second half-wavelength resonator portion floating above the ground plane, crossing an effective electric field mid-line of the ground plane, and located a predetermined distance from the antenna element for mitigation of the EM emissions of the antenna element at the one or more predetermined locations within the HAC measurement plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.