A method for on-wafer experimental characterization of a 4-port circuit, using a 2-port vector network analyzer

The paper presents an experimental method useful to characterize on-wafer a four-port circuit, using a two-port VNA (Vector Network Analyzer). As an example, the method is applied for a coupler. The results obtained by using this method and the expected results obtained by simulation are in good agreement

Laser surface nanostructuring of platinum

International audienceExtended surfaces of Pt films were nanostructured using the self-organization of surface material induced by ultrashort laser pulses with 200 fs pulse duration. Different surface morphologies are observed depending on the irradiation conditions, such as laser fluence and number of laser pulses. The processed surfaces were analysed by SEM and cross-section SEM. Periodical structures with periods of 180 nm up to 720 nm were obtained

Nonlinear composite right/left-handed transmission line for frequency doubler and short pulse generation

In this paper a balanced Non-Linear Composite Right/Left-Handed Transmission Line is designed and then analysed for applications of frequency doublers and short pulse generation. The circuit is an array of cascaded cells, each one consisting of series connected reverse biased Schottky-varactor diodes and parallel connected open-ended transmission line

Design and fabrication of mmic coupled lines coupler consisting of composite right/left-handed transmission lines

Coupled-line directional coupler based on CRLH (Composite Right/Left-Handed) cascaded structures is designed, analyzed and then fabricated. The technological realization of the coupler involves one mask process on silicon substrate, using CPWs (CoPlanar Waveguides). The preliminary measurements were also performed, showing that the experimental results fit well the simulation results

Millimeter frequencies generation on a travelling MMIC Schottky diode array and application in an automotive sensor

The paper presents the design, modelling and manufacturing of a new type of MMIC a nonlinear transmission line which consists of 45 Schottky diodes monolithically integrated in a CPW based on GaAs. A four masks technological process was developed, using a special hyperabrupt n-n+ profile on a semi-insulating GaAs substrate