高频线阵的研制

A high frequency linear array

本文描述了一种用于侧扫声纳的高频线列阵．该阵由中心频率分别为100kHz和500kHz的两部分构成．由于采用阵元加权排列和充分利用有效工作面积，该阵具有尖锐的主瓣，较高的主、副瓣比和较高的发射、接受灵敏度（100kHz时分别为174dB、－178dB，500kHZ时分别为174dB、－183dB），技术指标达到国外同类高频线阵的水平．满足侧扫声呐的尖波束、低副瓣、大功率、高灵敏度，深水（100m）使用的要求．本阵的设计方法和结构特点，可供设计高频基阵参考．

This paper describes a bigh frequency linear array developed for appli cation to a side-scan sonar. The array consists of two parts, one for operating at the central frequency of 100kHz and the other for 500 kHz. Due to the weighted spacing of the array elements and full utilization of effective operation area, the array has the advantages of sharp main lobe, high main/side lobe ratio, and high transmitting and receiving sensitivities (174 dB and ~178 dB at 100kHz, and 174 dB and -183 dB at 500 kHz, respectively). The performance of the array reaches the international commercial level and can satisfy the requirements for the side-scan sonar in the aspects of narrow beam, low side lobes, high power, high sensitivity and deep operation depth (1000m). Tbe design and construction of the array pres ented in this paper may also be a useful reference for the design of high frequency arrays.