PHYSICS 1 Chain of Oscillators Maxima

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PHYSICS 1 Chain of Oscillators Maxima Somnath Bharadwaj and Pratik Khastgir, Department of Physics and Meteorology, IIT Kharagpur, 721 302 India http://www.cts.iitkgp.ernet.in/~phy1/

Intensity Pattern

Width of Maxima

Phas difference Between 2 oscillators

Problem Consider a chain of 100 dipole antennas, d=1 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?

Pased Arrays

Array of Phased Arrays

Arcminute Microwave Imager Cambridge, UK 12-18 GHz 13 m diameter

Diffraction Grating

Grating

Diffraction Grating

Dispersive Power

Chromatic Resolving Power

Chromatic Resolving Power ninina maxima

CRP