Antenna manufacture including inductance increasing removal of conductive material
US7515115B2 · kind B2 · utility
3Cited by
27References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2004 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Nov 7, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49165
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a method of producing a quadrifilar antenna for circularly polarised radiation at frequencies above 200 MHz, the antenna is tuned by coupling it to a test source, measuring the relative phases and amplitudes of currents at predetermined positions in the individual elements of the antenna by means of probes capacitively coupled to the elements, and laser etching apertures in the elements to increase their inductance, the sizes of the apertures being computed according to the deviation of the measured relative phases from predetermined values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.