Microstrip radiator with folded resonant cavity
US4131893A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1977 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Apr 1, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0428
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A resonant microstrip radiator wherein the size of the radiator is reduced in the resonant or non-resonant dimensions, or both, without reducing the effective resonant dimension or substantially lowering the efficiency of the radiator. Reduction of the resonant dimension is provided by folding the resonant cavity, while reduction of the non-resonant dimension is facilitated by utilization of a low density, low loss dielectric, such that the loss resistance of the element is appreciable with respect to the radiation resistance of the element. Also disclosed are interdigitated antenna structures and provisions for circularly or elliptically polarized radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.