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Diffstat (limited to '1595/CH12/EX12.7')
-rwxr-xr-x | 1595/CH12/EX12.7/ex12_7.sce | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/1595/CH12/EX12.7/ex12_7.sce b/1595/CH12/EX12.7/ex12_7.sce new file mode 100755 index 000000000..326ecf2ad --- /dev/null +++ b/1595/CH12/EX12.7/ex12_7.sce @@ -0,0 +1,25 @@ +//Transmission Lines : example 12-7 : (pg 592 & 593)
+Zl=300;//load impedance
+Zo=50;//characteristic impedance
+v=2.07*10^8;//velocity in RG-8A/U cable
+f=27*10^6;//operating frequency of citizen's band transmitter
+Po=4;//output power of transmitter
+l=10;//length of RG-8A/U cable
+Rl=300;//input resistance of antenna
+T=((Zl-Zo)/(Zl+Zo));//reflection coefficient
+h=v/f;//length of cable in wavelength
+le=l/h;//electrical length
+x=Rl/Zo;//VSWR
+y=((1+T)/(1-T));//VSWR
+rp=(T)^2*Po;//reflected power
+Pl=Po-rp;//load power
+//part(a): The reflection coefficient
+printf("\nT = ZL-Z0/ZL+Z0 = %.2f",T);
+//part(b) : The electrical length of the cable in wavelengths(h)
+printf("\nh = v/f = %.2f m",h);
+mprintf("\nBecause the cable is 10m long,its electrical length is (%.f m)/(%.2f m/wavelength) = %.1fh",l,h,le);
+//part(c) : The VSWR
+printf("\nBecause load is resistive, \nVSWR = %.f",x);
+printf("\nAn alternativr solution, because T is known, \nVSWR = 1+T/1-T = %.f",y);
+//part(d) : absorbed power
+mprintf("\nthe reflected voltage is T times the incident voltage,\nreflected voltage = %.2f W \nPload = %.2f W",rp,Pl);
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