Saturday, May 16, 2020

QUCS Studio vs ADS2016. Annex Simulation. Microstrip Coupled lines


As a Annex of a previous document in this entry you will find a document where it is included one more comparison between the results obtained when a simple coupled pair of microstrip lines are simulated using QUCS Studio and those obtained using ADS 2016.
In the previous document, that you can also find as one entry of this blog, you will find more examples of simulations comparing different microstrip structures very commonly used in high frequency RF circuits.
This time, the schema simulated is a pair of coupled microstrip lines matched in the isolated port and the coupled port with the characteristic impedance, in this case, 50 ohm, then terminated with the MELF component in ADS comparing it with the MOC from QUCS Studio, and, finally, evaluating only the microstrip coupled lines in both simulators.

The link where the Annex can be accesed is the following:


The link where the S2P files with the results obtained from ADS2016 can be obtained in this link:


Sunday, May 3, 2020

Infineon RF Transistors SPICE library converted for QUCS Studio

In the SPICE and Models section of this site, you will find the QUCS Studio compatible models for the RF bipolar transistor library published by INFINEON in their website. The transistors are included in a project and they are the following:

*     BFP181              BFP620F             BFP843              
*     BFP182W             BFP640              BFP843F             
*     BFP183              BFP640ESD           BFQ19S              
*     BFP183W             BFP640F             BFQ790              
*     BFP193              BFP640FESD          BFR106              
*     BFP193W             BFP650              BFR181W             
*     BFP196              BFP720              BFR182              
*     BFP196W             BFP720ESD           BFR182W             
*     BFP405              BFP720F             BFR193F             
*     BFP405F             BFP720FESD          BFR193W             
*     BFP410              BFP740              BFR340F             
*     BFP420              BFP740ESD           BFR35AP             
*     BFP420F             BFP740F             BFR380F             
*     BFP450              BFP740FESD          BFR740L3RH          
*     BFP460              BFP750              BFR840L3RHESD       
*     BFP520              BFP760              BFR843EL3           
*     BFP540              BFP780              BFR92P              
*     BFP540ESD           BFP840ESD           BFR93A              
*     BFP540FESD          BFP840FESD          BFR93AW             
*     BFP620              BFP842ESD

Along with the models test files are included in the project in order to get an idea of what are the shape of the DCDC curves of each transistor.

It is important to note that several models have convergence issues during the DCDC analysis, that are currently under investigation.