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Electromagnetics Experiments
LEEI-14 Van De Graaff Generator
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LEEI-61 MW Experiment-Basic
LEEI-62 MW Experiment-Advanced
 
Microwave single slit diffraction

Diffraction distribution of single slit

 

Microwave double slit interference

Interference of double slits

 

Microwave Brag diffraction
Microwave Brag diffraction
Bragg diffraction
 
      
LEEI-62

Interference, Diffraction & Polarization of Microwave - Advanced

        
Interference, Diffraction & Polarization of Microwave
          
Introduction

Microwave and lightwave are both electromagnetic waves. They share common phenomena of all waves, such as reflection, refraction, polarization, interference, and diffraction. However, as the wavelength of a microwave is about 4 orders of magnitude larger than that of a visible lightwave, the experimental phenomena and apparatus of microwave are different.

 

This LEEI-62 experimental system of microwave interference, diffraction and polarization consists of a microwave transmitter with a variable attenuator, a microwave detector with amplifier and meter display, a transmitting horn and a receiving horn, as well as other accessories such as single slit, double slits, beam splitter, crystal model, etc. It can provide quantitative measurements of a series of experiments such as:

 

1. Verify reflection law of electromagnetic wave

2. Measure intensity distribution of single-slit diffraction

3. Measure intensity distribution of double-slit interference

4. Measure microwave wavelength through interference of Michelson interferometer

5. Study polarization and verify Malus' law

6. Verify Bragg diffraction of crystal model

 
Specifications 
Solid state microwave signal source
Frequency Range: 8.6~9.6 GHz; draft: ± 5×10-4/15-min; display error: ±40 MHz
Output power >20 mW
Working voltage DC 12 V
Wave form Equal amplitude
Internal modulation Square-wave at 1 kHz
Output waveguide dimensions Inner: 22.86 mm × 10.16 mm
Standing-wave coefficient ≤ 1.2 (synthesis voltage)
Output microwave wavelength λ =32.02 mm (factory preset)
Horn antenna Gain ~ 20 dB; lobe width H 200 & E 160

 

Part List   

Description

Qty

3-cm solid state microwave signal source

1

Base
1

Indexing disk

1

Fixed arm

1

Horn antenna

2

Variable attenuator
1
Crystal detector
1
Indicator meter
1
Video cable
1
Reflection plate
1
Single-slit plate (slit width=70 mm)
1
Double-slit plate (slit width=40 mm; separation=170 mm)
1
Partial transparent plate
1
Simulated crystal with support
1
Reading mechanism
1
Support base
1
Support post
4
Module piece
1
Screws and nuts
1 set
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