1) Laser frequency switch
雷射频率开关
3) RF switch
射频开关
1.
Design on slab mode MEMS RF switch;
一种平板式MEMSRF射频开关的设计
2.
A novel structure of a capacitive Micro-Electrical-Mechanical-System (MEMS) RF switch was presented.
提出了一种新型的腔体式共面波导型微机械射频开关的结构,可动的金属/电介质的复合膜结构的共面波导既可作射频开关,同时也构成微波信号的传输路径。
3.
Here a new method of noise figure measurement with multi-channel switch is proposed,in which we design a SPMT RF switch and optimize the Y-factor method by adding the control circuit for LNA to provide noise source in different temperature.
提出一种多通道切换优化测量噪声系数的方法:通过设计1个八选一的射频开关实现信道切换,并引入前置低噪声放大器的控制电路提供冷热噪声源,优化Y因子测量噪声系数的方法,实现对各通道的精确测量。
4) RF switches
射频开关
1.
Discusses the RF switches in communication Systems.
总结了射频开关的带宽、插入损耗、隔离度、功率容量、开关速度、VSWR、功耗、使用寿命和尺寸等主要性能指标。
2.
Some optimization designs were made with the on-chip inductor and the RF switches to get the maximum Q-value.
采用了电容开关的技术以补偿工艺、温度和电源电压的变化,并对片上电感和射频开关进行优化设计以得到最大的Q值。
5) switch frequency
开关频率
1.
Selection of switch frequency in direct current electromotor PWM modulation.;
极压仪中直流电动机PWM调速下开关频率的选取
2.
The DC-DC convertor features high switch frequency up to 1MHz using ultra-small inductors and ceramic capacitors.
应用PWM设计高可靠DC-DC变换器,其开关频率更高,可达1 MHz,这样减小了储能元件的尺寸,可采用陶瓷电容器,提高系统的可靠性,降低了成本。
3.
The reason of output current distortion is analyzed;and a new way to resolve the problem is put forward;it is controlling switch frequency changing in different sections according to system run state.
分析了引起输出电流畸变的原因,并提出可根据系统工况分段控制开关频率的方法来解决由这些原因引起的输出电流畸变。
6) switching frequency
开关频率
1.
Selection of phase-shift SPWM switching frequency
载波移相SPWM开关频率的选取
2.
Hysteresis control has disadvantage of unstable switching frequency.
滞环控制方法存在开关频率变化不定的缺点。
3.
To reduce the switching frequency and current error of a static synchronous compensator (STATCOM) for reactive power compensation, a novel direct current control strategy is proposed.
提出一种适用于STATCOM的直接电流控制新方法以减小开关频率和电流跟踪误差。
补充资料：肺癌经皮肿瘤内射频治疗
肺癌经皮肿瘤内射频治疗
介入放射学技术。在经皮穿刺活检技术上发展起来的一种用高频电磁波治疗肺癌的方法。在活检以后，通过保留的穿刺针将高频电磁场导入肿瘤内施行辐射，射频电磁波在生物介质中产生的热及非热效应可凝固癌组织，杀死癌细胞。根据肿瘤的大小，可分别采取单点和多点辐射，使肿瘤破坏更彻底。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条