Link with XFdtd


XFdtd®’s link with Optenni Lab benefits the matching network design workfow. The full wave solver in XF is used to calculate the S-Parameters and efficiency of an unmatched device. Those results are then fed into Optenni Lab where a circuit solver is used to determine the optimal matching network topology and associated component values.

After Optenni Lab determines the optimal matching topology, the physical copper traces and component pads are laid out on the PCB in XF.

XFdtd’s Circuit Element Optimizer then picks up where other EM simulation programs leave off, taking the antenna matching schematic into the electromagnetic simulation and optimizing the lumped circuit elements directly in the physical matching circuit layout. By determining the optimal component values using full wave FDTD simulation, electromagnetic phenomena, such as coupling, is taken into account.



Optenni Lab Licensing

Optenni Lab is available as node-locked and floating license options. In addition, you may either purchase the license and then pay yearly maintenance fees to get access to the most recent version, or lease the software on a yearly basis. Please contact us at info (at) to get further information.

Optenni Lab is available as a free 30-day evaluation license.

Optenni Lab is also available through the global CST and Altair/FEKO distribution networks and through the Altair Partner Alliance. Click here to see the contact information.

Optenni Lab — Tunable matching circuits

Optenni Lab supports the optimization of frequency tunable matching circuits, i.e. matching circuits that contain tunable or switchable components that are used to select the operation frequency of the antenna or RF system. This is a challeging optimization task as at the same time the values of the fixed components and multiple states of the tunable components are optimized to maximize the efficiency for each operation frequency band. Optenni Lab provides a unique easy-to-use solution to optimize tunable matching circuits.

Tunable and switchable components can be used in Optenni Lab in two modes:

  • Tunable components (e.g. variable capacitor or digitally switchable capacitor) described using two-port S2PMDIF data files (a collection of two-port Touchstone files for all the states of the component)
  • Switchable components, where there would be N different inductors or capacitors after an SPNT switch. In Optenni Lab the switch can be represented either by a simple "on" state resistive loss (assuming zero off-state capacitance) or by on/off state S-parameter description. The appropriate switch model is then placed in series with a single library component (inductor or capacitor), having N independently optimized states

After the optimization, Optenni Lab will show the S parameters and efficiencies for all the optimized tuner states. In addition, tabular information shows the optimal tuner states for the different operation frequency bands.

Thus, Optenni Lab can be used to optimize single-port and multiport tunable matching circuits and also tunable lumped element filters.


Electromagnetic Simulator Links Supported by Optenni Lab

Currently Optenni Lab supports links with the following electromagnetic simulators:

In a typical workflow the antenna geometry is designed and the radiation properties are characterized in the EM tool, and Optenni Lab is linked to the EM tool to provide the matched performance corresponding to the state of the design. Optenni Lab can utilize the frequency-dependent radiation efficiency data (accounting for metal and dielectric losses of the antenna and its environment) in the matching circuit synthesis, typically available from the EM analysis of the antenna.

Optenni Lab — Connection to network analyzers

Optenni Lab can be easily interfaced with network analyzers to read measured impedance data from network analyzers and to optimize matching circuits in real time based on the changing measurement data. Network analyzers from the following manufacturers are supported:

Optenni Lab supports LAN, USB and GPIB connections to network analyzers. The setting up of the link to network analyzers is extremely simple:

  1. Connect your workstation and the network analyzer with a cable
  2. Select the connection type (LAN/USB/GPIB) and enter the device address or select the device from a list of connected devices
  3. Connect to the device
  4. Choose the number of measurement ports

When the measurement has been set up, you can examine in real time how the bandwidth potential or electromagnetic isolation changes when the antenna configuration is changed. You can see in real time how the performance through a matching circuit changes and also re-optimize the matching circuit as the antenna is changed. These features greatly enhance the productivity of antenna prototyping and measurement activities.


Video presentation: Link from Optenni Lab to network analyzers: