查询词典 radio frequency

Software radio system is applicable to multiple frequency bands and it can change working mode flexibly. The system can interwork and is compatible with various equipment of different system and standard.

软件无线电系统适用于多个频段，可灵活地改变工作模式，能与不同体制和标准的各种设备互通和兼容。

The lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves .

电离层中的最底层，处于地球表面以上至英里的部分，反射低频无线电波。

Optical signal that the receiver receives , shaking the light wave produced with the receiver , on terms that meet the phase place and match and the amplitude is matched, mix it frequently , output the square of intermediate frequency signal electric current in direct radio of sum of the intensity of optical signal produced with optical signal , and receiver .

接收机接收到的光信号、与接收机内部振荡所产生的光波，在满足相位匹配和振幅匹配的条件下，进行混频，输出与光信号、和接收机产生之光信号强度之和的平方成正比的中频信号电流。

Unbeknownst to him, the TV was emitting an errant radio signal at a frequency of 121.5 megahertz.

在他不知情的情况下，这台电视机以121.5兆赫的频率在发射错误的无线电信号。

The IAM-93516 is ideally suited for frequency down conversion forbase station radio card receiver, microwave link receiver, MMDS,modulation and demodulation for receiver and general purposeresistive FET mixer, which require high linearity.

IAM-93516是理想的适合无线电基站图表接受器、微波连接器、MMDS的下变频器和接受端的调制器、解调器，一般的用途FET混频器，需要有很到的线性度。

The IAM-93516 is ideally suited for frequency down conversion for base station radio card receiver, microwave link receiver, MMDS, modulation and demodulation for receiver and general purpose resistive FET mixer, which require high linearity.

IAM-93516是理想的适合无线电基站图表接受器、微波连接器、MMDS的下变频器和接受端的调制器、解调器，一般的用途FET混频器，需要有很到的线性度。

This paper describes a microstrip upper frequency converter which is used in the 2GHz radio relay as a transmitting mixer of the microwave integrated transmitter.

本文论述的微带上变频器是在2GHz中继通信中作为微波集成发信机的发信混频部件。

At radio-frequencies the dielectric permittivity of cell suspensions are monotonic function of the measuring frequency and cell density.

微生物的存在会改变发酵液的电特性，发酵液在无线电频率范围内的电容率增量是测量频率和生物量浓度的函数。

Based on that the dielectric permittivity of cell suspensions is monotonic function of the measuring frequency and cell concentration at radio-frequencies,a new method for detecting cell concentrations on-line and in-situ is proposed .

利用发酵液在无线电频率范围内的电容率是测量频率与菌体浓度的函数，提出了一种实时在线检测发酵过程菌体浓度的新方法，设计了检测传感器和自动检测系统，并且实验验证了该检测方法及检测系统的可行

The 6V6-GT is a beam-power pentode designed for use in the audio-frequency power output stage of television and radio receivers.

是一支功率放大束射四极管，被设计用于电视机和收音机的音频放大功率输出级。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。