Physics Lab Equipment

LEAI-65 Microwave and Waveguide Experimental System

LEAI-65 Microwave and Waveguide Experimental System

Note: oscilloscope not included

Features

  • Comprehensive microwave waveguide experiments

  • Various waveguide components

  • High quality microwave devices

  • Dielectric material samples included








Introduction

This experimental system is designed to measure microwave parameters, suitable for modern physics or electrical engineering teaching at colleges and universities. It consists of various microwave waveguide components at three-centimeter wavelength. Various experiments can be configured by selecting proper components, allowing students to conduct the following experiments:

 

1. Learn how to use various microwave devices and components

2. Understand microwave work states and transmission characteristics through waveguides

3. Understand field properties of microwave transmission paths

4. Measure standing wave, attenuation, wavelength (frequency), and power of microwave

5. Learn how to measure permittivity of microwave dielectric materials and tangent value of loss angle


Specifications

Solid-state microwave signal source
Frequencyrange: 8.6 ~ 9.6 GHz; draft: ± 5×10-4/15 min; display error: ± 40 MHz
Output power> 20 mW
Attenuation adjustment range> 20 dB
WaveformEqual amplitude
Internal modulationsquare-wave; repetition frequency 1000 Hz
External modulationpolarity: +/-; amplitude: 5 ~ 40 VP-P; width: 0.2 ~ 3 μs; frequency: 300 ~ 3000 Hz
Narrow-band frequency scanscan width: > 50 MHz; continuously adjustable
RF output connectorN-type 50 Ω coaxial connector
Scan outputBNC connector, sawtooth wave output: 1 ~ 10 V
Slotted line measurement device
Frequency range8.2 GHz ~ 12.4 GHz
Standing-wave coefficient≤ 1.03 (synthesis voltage)
Probetravel: 95 mm; insertion depth: 1.5 mm
Frequency-selective amplifier
Frequency range400 Hz ~ 10 kHz
Input voltage dynamic range10 μV ~ 2000 mV
Sensitivity10 μV (full scale)
Input impedance20 kΩ (1 kHz)
Centimeter wave power meter
Frequency range8.6 GHz ~ 9.6 GHz
Power range100 μW ~ 100 mW
Microwave wavemeter
Frequency range8.2 GHz ~ 12.4 GHz
Resolution0.005 GHz
Waveguides
Cross section dimensions inner: 22.86 mm × 10.16 mm (EIA: WR90 or IEC: R100)


Parts List

DescriptionQty
Solid-state microwave signal source (@3 cm)1
Slotted line measurement device (3 cm microwave)1
Frequency-selective amplifier1
Centimeter wave power meter1
Variable attenuator1
Wavelength meter1
Detector1
Cable1
Detector display1
Isolator2
Circulator1
Variable reactor1
Single micrometer tuner1
Straight waveguide1
Matching load1
Short-circuit plate1
Resonant cavity1
Coupler plate1
Dielectric material sampleplastic glass, PTFE & black bakelite (3 pcs/ea)
Waveguide stand support3
Screw40
Instructional manual1
Precision variable attenuator

1 (option 1)

H-type 90 degree curve waveguide1 set (option 2)
H-type waveguide switch
Straight waveguide (L=150)
Directional coupler
Mismatched load (VSWR 1.5 or 2.0)
Mismatched load (VSWR 6-7)
Passing through cavity

     Microwave and Waveguide Experimental System.png

Standing wave measurement

(Click figure to enlarge)


     LEAI-65 Series Experiments-1.jpg

Standing wave distribution in cavity

(Click figure to enlarge)


     Microwave and Waveguide Experimental System.png

Microwave power measurement

(Click figure to enlarge)

       LEAI-65 Experiments on Microwave & Measuring Waveguide Parameters.png

Resonance curve with sample in cavity

(Click figure to enlarge)


  Microwave and Waveguide Experimental System.png

Waveguide wavelength measurement

(Click figure to enlarge)

     LEAI-65 Experiments on Microwave & Measuring Waveguide Parameters.png

Measurement of ε and tan(δ) of media

(Click figure to enlarge)

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