WiComm Tools

The WiComm tools are an add-on to µWave Wizard™ developed by the WiComm Center of Excellence for Wireless Communication Engineering in Gdansk, Poland. The WiComm Center's research focus is on computational electromagnetics and photonics as well as on CAD of passive microwave structures - especially filters. 

Coupling Matrix Synthesis

WiComm's bandpass synthesis wizard allows a fast synthesis of the coupling matrix for a bandpass filter with a generalized Chebyshev response and required specification (filter order, return loss level, defined pure-imaginary transmission or complex transmission zeros and filter topology). The resulting coupling matrix is an excellent starting point for a filter design. The bandpass synthesis wizard uses a unique technique for coupling matrix synthesis, which is capable to find the couplings for various non-standard, unique topologies including several load (source)-resonator and direct load-source couplings.

Main features of the synthesis tool:

    • Support of arbitrary, user defined topologies.
    • Support of direct source-load coupling and several source(load)-resonator couplings.
    • Support of pure-imaginary and pairs of complex (equalization) zeros.
    • Robust algorithm of coupling matrix synthesis.
    • User-defined signs of the couplings.
    • Low-pass and band-pass input of filter specification.
    • On-the-fly preview of the filter prototype polynomials.
    • Group-delay preview.
    • Built-in optimization module of equalization (complex) zeros placement to flatten group delay.
    • Automated transform between low-pass and band-pass prototypes.
    • User-defined masks on filter response.
    • Easy tuning of the imaginary zeros with slider.
    • Preview of the response with finite Q-factor resonators.
    • Export of the coupling matrix to text file.