TRANSDUCER
To provide a transducer capable of increasing a relative bandwidth.SOLUTION: A transducer 2 includes: an oscillator 20 in which transmission sensitivity SE increases as a peak frequency fp corresponding to peak transmission sensitivity pp deviates from a center frequency fc of a predetermined band a...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a transducer capable of increasing a relative bandwidth.SOLUTION: A transducer 2 includes: an oscillator 20 in which transmission sensitivity SE increases as a peak frequency fp corresponding to peak transmission sensitivity pp deviates from a center frequency fc of a predetermined band and a frequency f moves away from the peak frequency fp with respect to the center frequency fc; and a wide band matching circuit 10 for performing impedance matching so that the transmission sensitivity SE of the oscillator 20 at the peak frequency fp is substantially equal to the transmission sensitivity SE of the oscillator 20 at the center frequency fc.SELECTED DRAWING: Figure 2
【課題】比帯域幅をより広くできる送受波器を提供する。【解決手段】送受波器２は、ピーク送波感度ｐｐに対応するピーク周波数ｆｐが所定帯域の中心周波数ｆｃから外れ、周波数ｆが中心周波数ｆｃを基準としてピーク周波数ｆｐから遠ざかるに従い送波感度ＳＥが高くなる振動子２０と、ピーク周波数ｆｐにおける振動子２０の送波感度ＳＥが、中心周波数ｆｃにおける振動子２０の送波感度ＳＥと略等しくなるようにインピーダンス整合を行う、広帯域化整合回路１０と、を有している。【選択図】図２ |
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