3D EM/Circuit Co-Simulation

Direct transient co-simulation of a Step Recovery Diode (SRD) Pulse Generator

The unique network co-simulation feature in CST STUDIO SUITE™ 2009 enables a direct transient simulation of a 3D CST MICROWAVE STUDIO® (CST MWS) structure with non-linear lumped components or circuit networks in CST DESIGN STUDIO™ (CST DS). This article shows the application of this feature to the simulation of a Step Recovery Diode (SRD) pulse generator. Read full article..

Thermal Analysis of a Two-Cavity Dual-Mode Bandpass Filter

The CST EM STUDIO™ Thermal Solver has been applied to simulate the temperature distribution of a dual-mode filter. The current density distribution inside the lossy conductive metals is precomputed by CST MICROWAVE STUDIO® acting as the thermal source. Read full article..

Six-Pole Bandpassfilter with Single Cross-Coupling

Tuning of a coupled-resonator filter is performed in this article by using the group delay response of the input reflection coefficient of sequentially tuned resonators containing all the information necessary to design and tune filters. To achieve high out-of-band rejection losses a single transmission zero is introduced producing a pair of finite frequency poles. CST MICROWAVE STUDIO® is used to optimize and/or tune the bandpass filter resonse in a complete model by applying the new, fast MOR-Frequency Domain Solver. To speed-up the tuning process the entire model is split up into several sections and recombined in CST DESIGN STUDIO™ to get the overall filter response. Read full article..

Transient Co-Simulation of a Hybrid Ring Mixer with Matching Network

This article demonstrates a strong feature of CST STUDIO SUITE™: Co-Simulation of a hybrid mixer with CST MICROWAVE STUDIO® (CST MWS) and CST DESIGN STUDIO™ (CST DS). A full 3D model is simulated and matched to a network using the in-built circuit simulator. Measured results compare well to the simulated results. Read full article..

IC Package Simulation

In this article the simulation of parasitic effects in a standard IC package is shown. The transient simulator in CST MICROWAVE STUDIO® (CST MWS) offers the advantage, that effects such as crosstalk and signal delay can be investigated in both time and frequency domain. Additionally, the simulation results can be used to generate an equivalent RLC network model that has the same S-Parameters as the 3D EM simulation but can be included in the overal circuit simulation of the logical parts of the IC. Read full article..

Five-Section Microstrip Hairpin-Filter

The example design is a classic hairpin filter with a bandwidth of 3.6 to 4.3 GHz. The hairpin filter was designed for a return loss better than -20dB across the band. CST DESIGN STUDIO™ was used to design and tune the filter, the resulting layout was then verfied with the 3D- EM simulation software CST MICROWAVE STUDIO®. Read full article..

CMOS VCSEL Driver Design using CST MICROWAVE STUDIO® and Agilent ADS

CST MICROWAVE STUDIO® and Agilent ADS have been successfully employed in this OEIC driver design - an example of a high speed analog/broadband IC application.The package model was imported from Agilent momentum and the model was simulated upto a 100 GHz in CST MWS.The resulting eye diagrams of the driver design from CST MWS are compared with those from Agilent momentum and other test cases. Read full article..