Chain of Oscillators

1
Chain of Oscillators
Maxima
PHYSICS 1

• Somnath Bharadwaj and Pratik Khastgir,
  Department of Physics and Meteorology, IIT
  Kharagpur, 721 302 India
• http//www.cts.iitkgp.ernet.in/phy1/

2
Intensity Pattern
3
Width of Maxima
4
Phas difference
Between 2 oscillators
5
Problem
Consider a chain of 100 dipole antennas, d1
m radiating at 150 MHz. Q1. In which direction is
the maximum intensity? Q2. How many maxima are
there? Q.3 What is the width of the maxima Q4.
What happens if there is a phase difference of
?/8 between the oscillators?
6
Pased Arrays
7
Array of Phased Arrays
8
Arcminute Microwave Imager
Cambridge, UK 12-18 GHz 13 m diameter
9
Diffraction Grating
10
Grating
11
Diffraction Grating
12
Dispersive Power
13
Chromatic Resolving Power
14
Chromatic Resolving Power
ninina
maxima
15
CRP