Hybrid transformer The standard 3 dB hybrid transformer is shown in figure 16. Power at port 1 is split equally between ports 2 and 3 but in antiphase to each other. The hybrid transformer is therefore a 180° hybrid. The centre-tap is usually terminated internally but it is possible to bring it out as port 4; in which case the hybrid can be used as a sum and difference hybrid. However, port 4 presents a. OverviewPower dividers (also power splitters and, when used in reverse, power combiners) and directional couplers are used mostly in the field of radio technology. They couple a defined amount of the electromag. The symbols most often used for directional couplers are shown in figure 1. The symbol may have the coupling factor in marked on it. Directional couplers have four. Port 1 is the input port where power is applied. Po.
