Miniature active conversion between microstrip and coplanar wave guide
US5550518A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1995 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | Jun 12, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An active device, such as a field effect transistor ("FET") or MMIC, converts microwave signals between a microstrip transmission line ("microstrip") and a coplanar wave guide ("CPW"). In microstrip-to-CPW conversion using a simple FET, a gate connection is made to the microstrip signal conductor. A drain connection is made to the center conductor on the CPW. Two FET source terminals are connected respectively to each CPW ground strip. The ground strips are electrically coupled to the microstrip ground plane with a minimum length connection so the inductance common to the FET input and output is minimized. The FET can be reconnected so as to reverse the input and output, providing for conversion of signals from CPW to microstrip. Conversion from microstrip to an intermediate CPW and back to microstrip provides for mounting an intermediate circuit, such as an amplifier or other MMIC, directly on the CPW.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.