2022-09-10 17:40 Status: Tags: # branchline coupler Planar circuitry, simplest type of [quadrature coupler](quadrature%20coupler.md). Each transmission line is a quarter wavelength (for best bandwidth, can also use 3/4,5/4 etc.). The lowest port (port 3) has the most negative transmission phase (largest path to travel).  [^1] --- # References [^1]: [Microwaves101 | Branchline Couplers](https://www.microwaves101.com/encyclopedias/branchline-couplers)