#### Terminator3

##### Advanced Member level 3

It can be directly pasted to freeware program called SpeqMath.C=299792458;

Freq=10.525*10^9;

'wavelength in free space (in mm)

L0=1000*C/Freq

L0 = 28.48384399

'width of patch (mm / mm)

w=8.8/L0

w = 0.308947065

'length of patch (between radiating edges)

l=6.03/L0

l = 0.211698955

'substrate height

h=1.6/L0

h = 0.056172194

Hplane(x)=Sin( (2*Pi*w/2) *Cos(x) ) / ( (2*Pi*w/2)*Cos(x)) *Sin(x)

Function Hplane(x) is defined

Eplane(x)=Sin( (2*Pi*h/2) *Cos(x) ) / ( (2*Pi*h/2)*Cos(x)) *Cos((2*Pi*l/2)*Cos(x) )

Function Eplane(x) is defined

Plot(20*Log10(Hplane(Pi/2+x*Pi/180)),xMin=-90,xMax=90)

Plot done

Plot(20*Log10(Eplane(Pi/2+x*Pi/180)),xMin=-90,xMax=90)

Plot done

(https://www.speqmath.com/)

Here is radiation patterns for E and H planes:

As you can see E-plane red curve looks not right (as i think).

I searched for some radiation pattern images in internet and found out that E-plane and H-plane pattern does not differ so much as on my image. Also i checked formulas many times and all seems to be ok. What's wrong here with red curve?