| 摘要 |
A directional coupler is disclosed comprising either a stripline or microstrip transmission line coupler apparatus serially coupled to an error correcting circuitry which is designed to minimize the standing wave in the coupled line. Elimination of the standing wave in coupled line results in a directional coupler of better accuracy. The error correcting circuitry uses an impedance mismatch of a preselected magnitude and phase angle which are determined by varying the same at a particular frequency until the standing wave of the coupled line is minimized. In the preferred embodiment, a length of coaxial cable is used.
|
