| 摘要 |
<p>A unidirectional SAW transducer (10) has a piezoelectric carrier (11) having first and second elements (15) arranged on the carrier surface. Each element (15) has a first exciting electrode (12), a second, antiphase exciting electrode (13), and a reflecting electrode (14). The elements (15) have a length corresponding to the SAW length μ at an average operating frequency. The width b1 of the first electrode (12) equals μ/6; the width b2 of the second electrode (13) equals μ/8; the width b3 of the reflecting electrode (14) equals μ/4; the distance between adjacent edges of first and second electrodes (12, 13) equals μ/6; and the distance between adjacent edges of the second electrode (13) and the reflecting electrode (14) equals μ/8.</p> |
