QuinStar Technology, Inc. Matched Hybrid Tees and Power Divider QJH

QuinStar Technology’s QJH series of matched hybrid tees (magic tees) cover the frequency range of 18 to 170 GHz in nine waveguide bands. These four-port devices are used for balanced power-combining and/or dividing RF signals over a broad bandwidth. Matched hybrid Tee contains four ports: an H-plane port, an E-plane port and two co-linear ports, as shown in outline drawing. A signal entering the H-plane port will be equally to the two co-linear ports, but not to the E-plane port. The output signals coupled to the two co-linear ports are in phase. Similarly, a signal applied to the E-plane port will divide equally into the two co-linear ports. However, the output signal will be 180 degrees out of phase with each other. If two signals of equal amplitude are applied to the co-linear ports, the signals will be coupled to the E-and H-plane ports. The amount of power combined at the E and H-plane ports depends on the relative phase relationship between the two input signals as follows: PH / PE = [cos(phi/2)/ sin(phi/2)]2, where phi is the relative phase difference between the two input signals. Hence, if the two signals are in phase, the total power will be combined at H-plane port. If the two signals are 180 degrees out of phase, the total power will appear at E-plane port. The isolation between the co-linear ports is greater than 20 dB, and between the E-plane and H-plane ports is greater than 30 dB. Typical applications for these tees include power dividers/combiners, bridge circuits, balanced mixers, amplifiers, and instrumentation setups. QuinStar can provide custom 4- or 8-way power dividers by combining several hybrid tees (power dividers) into a single housing. It is also possible to configure the hybrid junctions to achieve unequal power split in 3, 5, 6 or 7 ports. QuinStar Technology can also supply custom configurations (“folded tees”) with output ports in different locations than in the standard product. Other power dividers (short slot hybrids and “rat-race” hybrids) are also available as special orders. If your application requires a unique power division scheme, please contact QuinStar with your requirements. • Broadband Operation • High Isolation • Low Insertion Loss • Low VSWR