End-fed spiral antenna, and arrays thereof
US6067058A · kind A · utility
7Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1999 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Mar 3, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/27
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A planar spiral antenna is fed from the outer end, and one embodiment includes a capacitive plate adjacent the interior end. Two such planar spiral antennas are arrayed over a ground plane by the use of a phase shifter which provides a 90.degree. phase difference between the two elements of the array. In this array, the rotational positions of the arrays differ by 90.degree.. Two such two-spiral arrays are arrayed together, with elements of like phase delay diametrically opposite to each other in the overall array. This overall array has two feed ports, which are fed in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.