Some useful parameters

Dielectric constant 

Metals have infinite Dielectric constant 

As usually metals permittivity is very large than of free space hence its Dielectric constant is nearly infinite. 

Simple 2.4GHz dipole antenna program in MATLAB

Below is simple MATLAB code for 2.4GHz dipole antenna. Normally the length of this dipole is λ/2

λ=c/f

c is speed of light i.e. 300000000 m/s

And f here is 2.4GHz 

And we found λ/2 to be 0.0625

We used length here to be 0.0600 since for this length we get good VSWR or we can say reflection is low.

Code:

d = dipole('Width',0.000525, 'Length',0.060) %This shows the length and width of the dipole

%You can calculate the length as per lambda/2 and then optimize according to VSWR/Reflection coefficient you get

show(d)

freq = linspace(2e9,2.7e9,51); %This is frequency sweep

figure;

pattern(d,2.4e9)

figure;

vswr(d,freq,50) 

Below are the output figures

Radiation Pattern of the antenna is almost Omni-directional and it's like a donut shape.

In the figure below, you can see VSWR is below 2 and this is good value 

Frequency Modulated Continuous Wave Radar

FMCW is a Radar which measures both speed and distance of the target object. In CW Radar only speed is measured while in FMCW both speed and distance is measured. This distance measurement is achieved by frequency modulated wave.

There are different frequency modulation waveforms are used such as sawtooth, triangular, square, sine, and stepped modulation. 

Amongst these Sawtooth and Traingular are most widely used to change the frequency of EM wave.

How does it work???

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