Balun apparatus including impedance transformer having transformation length
US5565881A · kind A · utility
84Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1994 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Mar 11, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electrical connection between a balanced circuit, such as a radio receiver and an unbalanced circuit, such as an antenna requires a balun. In a small electronic device such as a radiotelephone, a traditional balun is impractical because of the physical constraints. The balun function is performed by using a transmission line of minimum transverse dimensions and a predetermined length between the receiver and the antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.