Design Equations for Broadside and Edgewise StriplineAdvanced Circuit Materials Division 100 S. Roosevelt Avenue Chandler, AZ 85226 Tel: 480-961-1382, Fax: 480-961-4533 www.rogerscorporation.com Advanced Circuit Materials Design 3.2.1 Design Equations for Broadside and Edgewise Stripline Couplers Designers wishing to split RF power at a desired proportion between two lines may do so by designing a four port stripline coupler device. For this discussion a coupler shall consist of two parallel stripline transmission lines having equal widths, equal distances from ground planes and uniform spacing between them running for a distance of 1/4 of a wavelength at the design frequency. Connections to both ends of the two lines are arranged to be out of the coupled region and to have the designed characteristic impedance (Z0). Ports 1 and 2 are on……