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Design and fabrication of annular arrays for high-frequency ultrasound

机译:高频超声环形阵列的设计与制造

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The design, fabrication, and performance of miniature high-frequency annular arrays are described. A 50-MHz, 2-mm-diameter, 7-element, equal-area annular array was fabricated and tested. The array elements were defined using photolithography and the electrical contacts were made using ultrasonic wire bonding. The resulting transducer produced pulses with a -6 dB bandwidth of 52% and an insertion loss of -16 dB. A radiation pattern was collected by scanning the transducer array above the tip of a glass fiber. A -6 dB two-way beam width of 75 microns was found at f/2. The radiation pattern decreased smoothly to less than -60 dB at a distance of 550 microns.
机译:描述了微型高频环形阵列的设计,制造和性能。制作并测试了一个50MHz,直径2mm的7元素等面积环形阵列。使用光刻定义阵列元件,并使用超声引线键合制作电触点。所得换能器产生的脉冲具有-6 dB的带宽为52%,插入损耗为-16 dB。通过扫描玻璃纤维尖端上方的换能器阵列来收集辐射图。在f / 2处发现了75微米的-6dB双向光束宽度。辐射图在550微米的距离处平滑减小至-60 dB以下。

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