| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an SAW chirp Z transducer usable in a mobile communication field. <P>SOLUTION: In the SAW chirp Z transducer, a down-chirp SAW distribution-type delay line functioning as a correlator is disposed at one main face of a piezoelectric substrate and two up-chirp SAW distribution-type delay lines functioning as a chirp signal generating distribution-type delay line is disposed at another main face, and the respective output signals from the SAW correlator and the SAW distribution-type delay lines are mixed into a mixer, thereby constructing the SAW chirp Z transducer. The SAW chirp Z transducer is not limited to radar field, and FDM/TDM conversion by chirp signal treatment can be applied to signal treatment and positioning from a large number of terminal stations such as satellite communication and wireless base station, therefore, the industrial value is very high. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
