High-frequency temperature-variable attenuator
US7119632B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2004 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Dec 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/227
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An absorptive temperature-variable microwave attenuator is produced using at least two temperature-variable (or fixed) resistors in series with a transmission line. The temperature coefficients of the temperature-variable resistors are selected so that the attenuator changes at a controlled rate with changes in temperature while attenuator remains relatively matched to the transmission line. In one embodiment, the resistors are thick-film resistors and a variety of temperature coefficients can be created for each resistor by properly selecting and mixing different inks when forming the resistors. Furthermore, attenuators can be created having either a negative temperature coefficient of attenuation or a positive temperature coefficient of attenuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.