The design concept is based on the half-concave geometry, in which the radiating surface is concave while the other surface remains plane. N2 - A geometric design for array elements of a piezoelectric linear array transducer is proposed and evaluated. T1 - Performance enhancement of a piezoelectric linear array transducer by half-concave geometric design
The increased sensitivity is mainly attributed to the focused radiating surface.", The enhanced coupling coefficient and bandwidth are caused by the broaden resonance of the elements, which is induced by the continuously varying thickness in the designed geometry. It was found that the half-concave array transducer has significantly broader -6 dB bandwidth (96%), higher effective electromechanical coupling coefficient (0.62), and lower insertion loss (-21 dB) compared to those (76%, 0.55, and -25 dB, respectively) of the plane array transducer. By comparing the transducer performance, a traditional linear array transducer with similar dimension has been fabricated. A dicing method was developed to shape the concave surfaces of the piezo elements and matching layers. A ∼1.8 MHz piezoelectric linear array transducer with half-concave elements has been designed, fabricated and evaluated.
The increased sensitivity is mainly attributed to the focused radiating surface.Ībstract = "A geometric design for array elements of a piezoelectric linear array transducer is proposed and evaluated.
A geometric design for array elements of a piezoelectric linear array transducer is proposed and evaluated.
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