共查询到20条相似文献,搜索用时 78 毫秒
1.
3.
5.
为了提高微波功率测量的准确性,文中将平面电磁波作用于霍尔器件,用解析方法得到了霍尔电压的直流分
量与微波功率密度之间的线性关系。基于同轴线设计了通过式与吸收式两种型号的微波功率探测器。以同轴通过式
为例,在0.1 mW~50.0 mW 的微波功率测量范围内,探测器的线性度达98.28%,瞬态响应时间为3 μs~6 μs,频率响应
范围为1 GHz~10 GHz。实验结果与理论分析结果一致,该新型探测器具有线性度好和响应速度快的特点,有望得到更
为广泛的应用。 相似文献
6.
前言 利用半导体在磁场中的霍耳效应原理直接测量磁场强度(或空间磁感应强度),是一种应用很广泛的方法。目前国内外厂家已研制和生产出多种型号的高斯计,都是利用上面原理制成的。由于该仪器价值较高,有许多高校因教学经费少,难以开出有关的实验题目。为此,我们自行设计和研制出“霍耳效应场强计”。该仪器线路简单、元件少、操作方便,稳定性好。现介绍于后,供同行们参考。 相似文献
7.
8.
本文介绍一种基于单片机的工频弱磁测量系统,能测量一毫高到一千毫高范围内、方向未知的工频磁场,可以作为环境工频磁场的有效监测手段. 相似文献
9.
霍尔效应和霍尔传感器的教学方法研究 总被引:1,自引:0,他引:1
磁电效应(电磁感应、霍尔效应、磁致电阻效应)是磁场与物质之间的重要的物理效应。只有深入理解电磁学原理,才能进一步学好霍尔传感器。本文针对现有教材状况,强调从理解电磁学中带电粒子在磁场、电场中的运动规律开始,进而深入学习霍尔效应和霍尔传感器。本文还介绍了用形象生动的教学方法,使学生扎实牢固地掌握该知识。 相似文献
10.
11.
G. de Mey 《Solid-state electronics》1977,20(2):139-142
The purpose of this paper is to investigate the influence of a non homogenous magnetic field on the characteristics of a Hall generator. For a particular shape of the magnetic field strength the problem can be solved without further approximations by an integral equation technique. This offers the advantage that the problem can be analysed for extreme values of the non homogeneous component of the magnetic field. This fact is checked by means of the Hall voltage generated in a rectangular sample. 相似文献
12.
13.
The measurement of a magnetic field vector using the magneto-birefringence effect in a magnetic fluid is discussed, and the characteristics of the experimental system are described. The system applies a laser diode and a thin film of magnetic fluid as a refracting element to measure magneto-birefringence. Magnetic fluids have both a large anomalous magneto-birefringence effect and a Faraday effect. These effects cause the change of intensity and the phase shift of a refracted laser beam. In the experimental system, a method for detecting these effects is proposed. On the basis of the experimental results, it is clear that the direction and the intensity of a two-dimensional magnetic field vector can be measured in the cases of both direct and alternating magnetic fields 相似文献
14.
动态高温温场测量装置研究 总被引:1,自引:1,他引:1
在航天用试验件进行风洞加热热试验时,试验件表面特定区域的温度可达1700℃甚至更高,对这种动态变化的区域温度场测量难度较高,一般只能使用成本昂贵的测温型红外热像仪实现,且对恶劣环境适应性不高。采用比色温度测量模型,选用近红外波段900nm附近两个波长作为测量波长,采用高动态响应CCD成像器件作为信号采集设备,保证了两个测量通道采集图像在空间上的对应,实现了测量区域内温度分布的测量,测量帧频最高可达40Hz,测量准确度小于6%。 相似文献
15.
《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1976,64(11):1643-1644
The stray magnetic field distributions from an isolated magnetic bubble domain of about 150-µm diameter in YFeO3 are measured by a micro Hall element made of a single crystal InSb with active dimensions of 5 × 5 × 2.6 µm3. Experimental results for an isolated bubble domain show fair agreement with the theoretical ones for a cylindrical bubble domain. 相似文献
16.
介绍基于耿氏效应的器件在太赫兹领域的研究,详细地阐述耿氏二级管的原理、工艺流程、关键技术的解决和耿氏二极管频率和功率的提高等.重点介绍耿氏二极管的封装工艺和耿氏二极管腔体的具体结构.系统论述通过制备腔体需要的关键尺寸,如腔体内部尺寸、波导型号,从而提取基波与谐波,并提出其提高频率和功率的途径. 相似文献
17.
18.
N.J. Janavičien≐ I.S. Levitas J.K. Požela K.K. Stalioraitis 《Solid-state electronics》1981,24(5):407-410
In the paper theoretical and experimental analysis of the performance of a device sensitive to the gradient of magnetic induction is presented. The device employs magnetogradient effect and consists of a semiconducting resistor fabricated from germanium and has sensitivity of the order of 5 mV mm Gs?1. 相似文献
19.
A ferroelectric field effect device 总被引:1,自引:0,他引:1