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RF/Microwave Directional Coupler Design Software: Lange
Where Synthesis enables Analysis.....™

Software Product: Lange

Atlanta RF Software offers RF/microwave CAE software product:
Lange, which performs Electrical &
Dimensional Synthesis, Sensitivity Analysis and Frequency Analysis of microstrip Interdigitated directional
couplers, and includes the following product features:

1. Synthesis of interdigitated coupler’s physical dimensions (strip width & spacing) from:
a) Coupling level (dB) and system impedance level (Zo), or
b) Even and Odd-Mode Impedances: Zoe & Zoo.
c) 4-strip or 6-strip interdigitated coupler designs.

2. Analysis of Impedances: Zoe, Zoo & Zo from known physical dimensions:
a) Range of Strip Widths: Wmin to Wmax.
b) Range of Strip Spacings: Smin to Smax.

3. Sensitivity Analysis of Impedance : Zoe & Zoo to:
a) Substrate thickness: H, and Dielectric Constant: Er.
b) Range of Strip Widths: Wmin to Wmax.
c) Range of Strip Spacings: Smin to Smax,

4. Frequency Analysis response profile of:
a) Dispersive Zoe, Zoo and their effective dielectric constants versus Frequency.
b) Conductor losses versus Frequency (Resistivity & Surface Roughness).

5. Default values for each User-entered input data.

6. Output Data stored on your hard drive for graphical plots.

Software product: Lange provides the User with full design capability, from Synthesis to Analysis. Hardware
Development time is drastically reduced when Lange characterizes your coupler prior to manufacturing. Simply
enter your dimensions, operating frequency and desired coupling, then let Lange do the rest.

                 Download the User Manual for software product: Lange to view
                 the many features and capabilities that support your RF circuit designs.

                 Download the DEMO software product:
Lange-DEMO to explore the
                 functions available and solutions offered to ease your everyday work load.

A typical Interdigitated Lange Coupler:

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