Controlled microwave sample irradiation system
US4922180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1989 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | May 4, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q11/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A microwave antenna structure couples electromagnetic microwave energy from a microwave transmission line into a sample contained in a sample container without invasion of the sample. The microwave antenna structure is formed by a bifilar helix of conducting first and second helical elements. The first and second helical elements are arranged in a parallel relationship defining a double helix with alternating spaced apart helical turns from the respective first and second helical elements. The double helix forms a holder for receiving and holding a sample container within the turns of the double helix. The first and second helical elements are formed with coupling extension for coupling to opposite polarity conductors of a microwave transmission line. Electromagnetic microwave energy propagating along the transmission line is coupled into sample material within the sample container. A multiple sample microwave irradiation system provides an oil bath in the form of a reservoir containing relatively low dielectric constant fluid oil. A temperature regulator and circulator is immersed in the oil bath for uniform temperature control throughout the reservoir. Multiple microwave antenna …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.