Microstrip synthesis
Branch-line coupler
Quadrature hybrid: an equal split with 90° between the outputs. Four quarter-wave arms in a ring.
validated
Well-behaved closed form
A quarter-wave network of uniform lines. The closed-form response is exact for the ideal transmission-line model; what it does not include is junction discontinuity and the isolation resistor's parasitics.
What you get
Enter a specification and press Synthesize. Every result includes:
- Physical dimensions — widths, gaps and lengths in millimetres
- A drawn layout, to scale
- The predicted response, with the honesty label above attached to it
- A manufacturability check against a real Australian shop's process envelope
- The models used and the range over which they are valid
- A KiCad footprint and a DXF you can take straight to CAD
Nothing is stored against you, and the result page has a shareable address.