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Filter

This page lists improvements to the AWR Design Environment for filter designers.

V15

Efficiently Define Custom Ripple, or Other Sliding Window, Performance Specifications

Measure ripple of user-defined performance specifications

The project opens and displays filter performance.

  1. Note the Pass Band Ripple measurements.
    • Both S-parameters and impedance ripple display.
  2. Open the "Filter Equations" output equations document.
    • Note the use of the deltawin() equation function to evaluate S-parameter and impedance ripple in a custom bandwidth.

Optimize Directly on Custom Ripple Specification

The optimizer window displays alongside the filter performance.

  1. Choose Random (Local) as the Optimization Method in the Optimizer window and click Start.
    • The filter parameters are optimized, resulting in filter performance metrics that meet the custom ripple specification.

V13

This page contains improvements to the AWR Design Environment for filter designers.

License requirements: Advanced iFilter (FIL_350)

Synthesize your complete filter, inclusive of stop-band nulls.

Control the asymmetry of your filter pass-band edge response.

Easily incorporate your filter into your circuit with a more complete element order specification.

iFilter Transmission Zeros

The project will open to an iFilter designed filter Circuit Schematic.

  1. Open the Final instance of the iFilter Filter Synthesis Wizard.
  2. It should open to the filter design and open the Advanced Synthesis tab where the user can control Transmission Zero placement.
  3. Add a new transmission zero at 550 by pushing the + button on the right side next to the Finite list in the Transmission Zero Placement section.
  4. Note the change in the filter response.
  5. If desired the message about the filter not being extracted is cleared with the Next button in the Automatic Extraction Solutions section of the Advanced Synthesis dialog.
    • Point out to the user that we support both automatic and manual extraction of zeros to allow for full control of the filter topology