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- Both theoretical and experimental results show that the packaged photodiodes can have a 3 dB bandwidth which is broader than that of the photodiode chip. 理论分析和实验结果都证明优化封装后器件的频率响应带宽超过了芯片的响应带宽。
- --3 dB bandwidth -3dB带宽
- After taking account of the logarithmic relation between the gain and the carrier concentration in quantum well material,the analytical expressions of the peak response frequency and the 3 dB frequency response bandwidth are obtained. 在考虑了量子阱材料中的增益和载流子浓度之间的对数关系后,得到了VCSOA的峰值响应频率以及3 dB频率响应带宽的解析表达式。
- The results indicate 3 db transducer bandwidths accord with demands of AOM placed in cavity basically. 结果表明,3db换能器带宽基本上符合腔内声光调制器的要求。
- Results: The median PTA changed by 3 dB, and hearing was presered to within 10 dB of preoperatie leel in 72% of patients. 结果：纯音测听平均值在中位数左右波动变化为3分贝，并且有72%25的患者的听力损失维持在术前水平的10分贝以内。
- It shows that the well-known 3 DB gain-bandwidth definition for ordinary helix traveliny wave tube can still be used for super-wide-band traveling wave tube. 增益参数工作区域图说明,超宽频带行波管增益通频带仍可采用通常螺旋线行波管增益通频带三分贝的原有规定。
- We measured the rattle noise of AEOLUS EQ2D140 diesel truck gearbox at idling, revealed the noise is caused by collision between the teeth of constant mesh gears, and suggested a structural approach for reducing the collision and the noise 3 dB(A). 本文在消声室内测试了东风牌EQ2D140柴油车变速器的怠速噪声,判明了该噪声是由变速器常啮齿轮的齿间敲击产生,提出了缓和此轮齿间敲击从而降低了变速器怠速噪声3dB(A)的结构措施。
- The 3(db) frequency bandwidth is 2 c/s. 3(分贝)带宽是2 c/s。
- The results show that the scheme of turbo code based on BPSK can degrade SNR 3 dB compared with that of BPSK and BPPM, and the scheme of BPSK is efficient to degrade the BER of system when the SNR is high. 结果表明;基于BPSK的turbo码系统比OOK和BPPM系统的信噪比降低约3dB;且在高的信噪比情况下;BPSK系统能显著降低系统的误码率.
- In the tuning range, the EML output power variation is less than 3 dB, the extinction ratio variation is very little and the side mode suppression is maintained more than 30 dB. A wavelength fast tunable EML by using phase tuning is also proposed. 在调谐范围内,激光器输出功率的变化小于 3dB。
- Single mode emission of an external cavity laser was obtained experimentally at 1 GHz modulation with side mode suppression ratio better than 40 dB, 3 dB dynamic line width about 0.1 nm, and 20 dB dynamic line width about 0.3 nm. 对所研制的光纤光栅外腔激光器进行了高频调制测量 ;得到了在 1GHz下的单模激光输出 ;边模抑制比在 40dB以上 ;3dB动态线宽为 0 .;1nm左右;2 0dB动态线宽为 0
- Half-power beamwidth (3 db beamwidth) 半功率点波瓣宽度
- Design of 3 dB Quadrature Couplers for HF/VHF HF/VHF频段3dB正交耦合器的设计
- Design of A New Wideband Microstrip 3 dB Hybrid Ring 宽带微带线3dB混合环设计
- three dB bandwidth 三分贝带宽
- The farmer paid 3 laborers to gather the crop. 农场主雇佣3名工人收割庄稼。
- These fish vary in weight from 3 lb to 5 lb. 这些鱼的重量从3磅到5磅不等。
- He lives 3 miles away from here. 他住在距离这里三英里的地方。
- I'm tied up in a meeting until 3 pm. 我开会直到下午三点钟方可脱身。
- Mr. and Mrs. Jones have 3 daughters. 仲斯夫妇有三个女儿。
