A seven-port wave-correlator based vector network analyzer is proposed. The seven-port wave-correlator is a combination of two six-port wave-correlators which share common components. Furthermore, the complex wave ratio measurement accuracy is improved since the input signals can be directly detected by the side-arm ports. A seven-port wave-correlator is fabricated using microstrip branch line ...

Acoustic wave is a physical field that includes both scale field and vector field. Acoustic Vector Sensor (or called Combined Acoustic Vector Transducer) can pick up the information contained in both pressure and velocity fields, so it makes possible to use much more information. This paper from several sides: principle, structure and possibilities of its future applications, briefly discusses ...