Investigation of Technologies, Electrical Characteristics and use of R L C Lumped Element Circuits up to 15 GHz

The advantage of the lumped elements are smaller size, improved bandwidth, increased reproducibility, less weight and a potential cost savings. With the traditional technologies, it was not possible to obtain low loss lumped circuits above 3 or 4 GHz. That is the reason why L.T.T. has developed new technologies and investigated the electrical characteristics and some applications of R L C lumped circuits up to 15 GHz. These works allow us to realize : inductors with Q greater than 40 at 15 GHz and capacitors with series resistance less than 1 ¿ up to 18 GHz.