CPW Broadside Coupler

This is a model for the coplanar wave, broadside parallel line coupler (BSCCPW). This can be TEM or quasi-TEM as per homogeneous or non homogeneous dielectric distribution in a stripline case.

Coplanar Wave Broadside Coupler

StripLine Coupler Diagram

Coplanar Wave Broadside Coupler

Frequency (1Hz.. 100Ghz)

Planar track width mm (100.. 0.00001)

Planar track gap mm (100.. 0.00001)

Planar Spacing mm (1000.. 0.001)

Shield Height mm (1000.. 0.000001)

Outer Dielectric (100.. 0.9)

Inner Dielectric (100.. 0.9)

Reference termination (1..350 Ohms

A reference load is required for calculation of the Quarter wave coupler characteristics (defaults to 50 Ohms).

For your 3db coupler you could start from: Substrate Er = 12.9 in air Er = 1, substrate 50u, plane gap 100u, track width 90u, shield spacing 10mm.