QuinStar products QBC series bi-directional and dual-directional couplers*
are 4-port broadband, broadwall components with an inherently high directivity. Figure 1
below explains the port configurations and the difference between these two types of
4-port directional couplers. Bi-directional Couplers typically require an external
load or termination on one of the coupled ports, while using the other coupled port for
measurements. Dual-directional couplers are essentially two complete directional
couplers, in-line (back-to-back), each with its own internal load or termination. |
Dual-directional couplers are useful in simultaneously sampling or monitoring
the signals in both directions of the main arm of the coupler, for example, the
transmitted and reflected signals. The QBC series couplers are available in 10 dB, 20 dB,
30 dB, and 40 dB coupling values for standard waveguide bands from 26.5 to 110.0 GHz. |
