Two-way link with FEKO

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Customers who have both FEKO™ and Optenni Lab™ licenses can easily optimize matching circuits in Optenni Lab based on the electromagnetic simulation results from FEKO and return the matching circuits to FEKO as non-radiating feed networks.

To use the link, please follow these instructions:

  • In CADFEKO, click on "Application macro/Optenni Lab: Port matching" on the home tab of the ribbon. The simulated S-parameters will be transferred to Optenni Lab.
  • After optimization of the matching circuit in Optenni Lab, right click the circuit and select "Transfer circuit to FEKO and quit". After the transfer, Optenni Lab will close and control will pass back to FEKO
  • The matching circuit is built in FEKO as a non-radiating feed network which can be included in further FEKO simulations.



Two-way Link with ANSYS HFSS

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Customers who have both ANSYS® HFSS™ and Optenni Lab™ licenses can easily optimize matching circuits in Optenni Lab based on the electromagnetic simulation results from HFSS using a simple macro command.

To use the link in HFSS, simulate your design and then lauch the HFSS menu command HFSS/Toolkits/UserLib/Optenni Lab. The optimized matching circuits can be returned to the circuit schematic of ANSYS Electronics Desktop by right clicking a circuit and selecting "Transfer circuit to ANSYS Electronics Desktop". Further information is found here.


Video presentation of the link:

Link to Microwave Office

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Customers who have both NI AWR Design Environment/Microwave Office™ and Optenni Lab™ licenses can easily optimize matching circuits in Optenni Lab and transfer the matching circuits to Microwave Office for further processing in an easy, fast and transparent way. In brief, the procedure is as follows:

  • In Optenni Lab, optimize matching circuits based on measured or simulated impedance data
  • Right click the optimized matching circuit and select "Transfer circuit to Microwave Office"

The matching circuit is constructed in Microwave Office as a subcircuit, a two-port simulation and related plots are set up and the simulation is run automatically. Now it is easy to use the matching circuit as a submodel of the complete design in Microwave Office.


A video presentation of the link made in collaboration with AWR and Optenni:

See also the following material:

  • An article about LTE base station antenna design written by Pulse, NI (formerly AWR Corporation) and Optenni in EE Times Europe


Optenni Lab — Multiport matching

Optenni Lab has a separate module for simultaneous multiport matching, where the impedance matching is optimized for multiple ports simultaneously. The multiport matching has two operation modes:

  • Antenna mode: the efficiency of multiple antennas is optimized simultaneously.
  • General multiport mode: the suitable S-parameters (e.g. S21) of the matched system are optimized. This mode is used  for filters, amplifiers, near field communication, wireless charging etc.

In the antenna mode you can specify targets for the isolation between the antennas and in the general multiport mode you can specify stop band criteria for any of the S parameters. In both modes some of the ports can be shorted to the ground through an optimized matching circuits.

The simultaneous multiport matching is a much more complex matching problem than the single port matching especially if there is high coupling between the ports of the unmatched system. In general, the matching of all ports needs to be optimized at the same time. Optenni Lab's multiport module provides fast parallelized multiport matching and automatic or manual topology creation for all ports. The component libraries of Optenni Lab and the tolerance analysis are fully supported by the multiport module. The worst-case isolation between two antennas can be examined using the electromagnetic isolation tool in Optenni Lab.

The multiport module adds unique easy-to-use functionalities to Optenni Lab. Example applications of the multiport module are:

  • MIMO antenna matching: simultaneous matching of MIMO or diversity antennas, taking into account the coupling between the antennas. The system is optimized for best possible efficiency, not for best possible impedance match.
  • Near field communication and wireless charging: in near field communcation (NFC) and wireless charging applications the matching of both the receive and transmit coils (antennas) need to be simultaneously matched for optimial transfer of power.
  • Filter design: with some starting filter configuration it is easy to optimize the filter behaviour on pass bands and on stop bands.
  • Simultaneous input and output matching of amplifiers: an amplifier can be matched over a given frequency band so that maximal gain is obtained. This results in a good input and output match. The matching can be optimized with respect to any complex frequency-dependent load, not just to 50 Ohms.

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Setting up the multiport optimization for antennas: just click on the ports to set the operation frequencies and on the circuits to set the number of components (for automatic topology creation) or the topology to be optimized.

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Example of an optimized matching circuit for the simultaneous multiport matching.

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The Optenni Lab multiport module supports an arbitrary number of ports. Any of the ports can be terminated with a matching circuit and then grounded.

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An example of an optimized four-port system with attached matching circuits and one grounded port.

With the Optenni Lab multiport module you can obtain optimized multiport matching circuits using the correct optimization criteria within a matter of minutes.


Optenni Lab — Tolerance analysis

The properties of all manufactured inductors and capacitors always differ somewhat from the nominal performance. In Optenni Lab it is very easy to analyze the effect of component tolerances to the performance (impedance match and efficiency) of matching circuits. The tolerance analysis feature is available both for generic component models and for components in the Optenni Lab component library.


The tolerance analysis shows how the input impedance (S11) and efficiency (S21) through the matching circuit are changing due to the variations in component values. The yield relative to a given efficiency level and the worst-case efficiency are also calculated. Many component series include different tolerance variants (e.g. 2% and 5% relative tolerance)  whose performance can be easily compared in Optenni Lab.