Unique Amplifier and Impedance-Matching Design Tools
Ampsa provides its customers with a structured process for designing robust high performance RF and microwave amplifiers. Clipping theory has been developed to a fully useful form in the ADW. Design features include power contours with maximum efficiency lines, as well as second harmonic clipping contours and continuous mode options. Power parameters are used to provide load-pull capabilities in the ADW, and are also used to calculate the power and the efficiency.
Transistors are modelled by using S-parameters and IV-curves. The intrinsic load terminations of the transistor are controlled in the ADW.
Ideally the harmonic peformance should not be influenced strongly by the external load terminations. Transmission zeros are required in the load matching network for this purpose. The harmonic open or short provided by such a null should ideally be transformed to the intrinsic harmonic termination required for the desired performance. The synthesis process in the ADW now also allows for this.
The modeling approach in the ADW is ideal when an accurate non-linear model is not yet available for a transistor. When a model is available, the ADW model can be fine-tuned by comparing the results obtained.
Sophisticated optimization is provided in the ADW - This includes analysis and optimization for non-linear Cds.
Impedance matching in the Amplifier Design Wizard and the Matching Wizard is based on systematic searches on the transformation Qs, or systematic searches on the transmission delay and the associated design parameter. Harmonic traps are introduced in the design via fixed-element sections added to the matching network. The electrical lengths of the open-ended or shorted stubs in a commensurate network can also be set for harmonic suppression.
Training can be provided on the software, as well as amplifier design in general and the wizards can be customized to improve the design flow for specific customers.
In addition to the option to buy a permanent license for the ADW, annual subscription options are now also provided (see the price lists provided under Downloads).
32-bit, as well as 64-bit versions of the ADW and the MW are available.
Version 20 of the ADW has been released. When commensurate distributed matching networks are synthesized in the ADW, the line lengths are fixed by the user and the line widths are the variables. The line widths are fixed in non-commensurate networks, and the line lengths are the variables. In the new version a search can now be performed on the main-line line length (commensurate solutions) or characteristic impedance (non-commensurate solutions). This eliminates manual experimentation to find the best solution to a matching problem.