I am just a beginner in antenna Design using MATLAB . I tried for a resonant frequency of 25GHz using the following code :
p = patchMicrostrip;
lambda = 0.012;
p.Length = 0.00321;
p.Width = 0.00424;
p.GroundPlaneLength = 0.00621;
p.GroundPlaneWidth = 0.00724;
p.Height = 0.01*lambda;
p.FeedOffset = [p.Length/4 0];
figure(1);
show(p)
figure(2);
The dimensions are calculated using the formula from Balanis Book. the impedance curve shows this way ( see the attachemnt). Can anybody help me out saying what actually the impedance plot tries to say?
The graph seems to be saying that the load is purely reactive. It looks inductive in this range (because Z increases with increasing frequency). And there is no evidence of resonance at 25 GHz.
Resonance would show up as an impedance minimum, at 25 GHz. But here, you see the red line is essentially straight, rising linearly with frequency.
If you look at lower frequencies, maybe you'll see an impedance minimum, where the antenna resonates?
Dear Albert Manfredi ,
Thank you sir.
I will look into what has gone wrong.
Albert Manfredi really amazed to learn your explanation. You have such an insights in this area.
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