Antenna system with parasitic element for hearing aid compliant electromagnetic emission
US8483415B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2010 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | May 18, 2031 |
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 first leg and a second leg connected to 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. The first leg of the parasitic resonator element is connected to the ground plane on a first side of an effective electric field mid-line laterally dividing the ground plane and the second leg of the parasitic antenna element is connected to the ground plane on a second side of the effective electric field mid-li…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.