Microwave And Rf Communication Synthetic Experimental System

It is designed for experiments covering courses of "microwave technology", "microwave device", "microwave circuit" and "microwave communication". This equipment can be used for studying of principle of microwave communication and curriculum project and diploma project.

Least external apparatus, just one spectrum analyzer is needed;

Procedure of generating, transformation, filtering, transmission, amplify, transmitting and receiving of microwave
   signal are demonstrated on this equipment for students Studying of configuration and transmission of microwave

Modular and compact design, and internal coupled circuit makes easy measurement;

Experiments on single module or several modules together can be carried out for Studying more;

  • Advanced technology is adopted with reliable performance and good anti-interference;
  • Bidirection transmission of video and audio can be obtained with telephone, camera and monitor.

  • VCO: The power voltage of VCO is 12V and the output frequency is changed according to the voltage. The changed frequency range is 2.2GHz ~2.5GHz with voltage of 0~12V.
  • IF oscillator: Dot frequency signal with frequency of 70MHz is output and is used for signal source for upconversion.
  • Upconversion: Signals with frequencies of 70MHz and 2.4GHz are used for generating and downconversion signal whose frequencies are 2.47GHz and 2.33GHz.
  • Filter: The upconversion signal is used for transmission and downconversion is filtered.
  • Variable attenuator: The power voltage of microwave variable attenuator is 12V, and the voltage is changed within 0~12V to adjust the attenuation of input signal.
  • Low-noise amplifier: It is used for signal front-end amplification.
  • Downconversion: Mix the 2.470GHz microwave signal and 2.4GHz local oscillation signal to get 70MHz IF signal.
  • PLL: Reliable local signal at frequency of 2.4GHz is generated by PLL for downconversion signal source.
  • IF filter: There are two functions of IF filter: one is filtering the flooding wave after downconversion and the other is generating the sweeping signal (about 2.1GHz ~ 2.6GHz) with PLL.
  • Synthetic lab exercises
    IF transmission system experiment: IF signal (70MHz) microwave transmission is obtained by configuring modules.
  • Image transmission system: Both the image transmitter and receive have the R/L channels and video port, with four frequencies available. The television signal remote transmission is carried out when the frequencies of transmission and reception are the same. And the configured transmission systems are independent respectively when using transmission/reception signal with different frequencies. The image information is acquired by camera and displayed on the monitor after microwave transmission.
  • Video telephone system: Two experimental system used for simulating remote direction video telephone system.
2.4G Spectrum analyzer
Frequency range: 0.15-2400MHZ
Marker Accuracy: ±0.1%
Frequency Width: +100KHZ
Frequency Scan Width Accuracy: ±10% 
Resolution (-3DB): 400KHZ and 20KHZ 
Sweep Rate: 43HZ
Amplitude Width: 80DB(10DB/div)
Reference Level Accuracy: ±2DB 
Distortion: 2nd and 3rd harmonic <-55DBC
Sensitivity: better than -90DBM
Input Attenuator: 0-40DB(4*10DB)
Max. input level: +10DBM±25VDC(0DB attenuation)
+20DBm(40DB attenuation)
Sweep Width: 100KHZ/div-100MHZ/div, 1-2-5step and 0HZ/div (0 scan)