Manual Cascade Calculation with Mismatch Given the cascade
shown in Figure 1-40:

a. Find the...

Question

Manual Cascade Calculation with Mismatch Given the cascade
shown in Figure 1-40:

a. Find the cascade gain assuming the mismatch loss of every
component is zero (i.e., each component is perfectly matched to 50 ).

b. If each component has a maximum input VSWR of 2.0, what
are the minimum and maximum reflection coefficients present on the input port
of each device? What are the allowable angles of the reflection coefficient?

c. If each component has a maximum output VSWR of 1.5, what
are the minimum and maximum output impedances present on the output port of
each device? What are the allowable angles of the reflection coefficient?

d. What is the maximum possible input mismatch loss of each
component? What is the maximum possible output mismatch loss of each component?

e. What is the minimum and maximum gain of the cascade if
each component has a maximum input VSWR specification of 2.0 and a maximum
output VSWR specification of 1.5?

f. Describe, in words, the condition in which the gain
variation varies the most from its nominal or matched value.

Figure 1-40

Baljit · Accepted Answer

Manual Cascade Problem
A. Cascade gain(decibal)= sum of gain(decibal) of all component in series
Cascade gain(decibal)= -5.0+17-4-15=-7dB
B. Maximum Input  VSWR =2
we know that VSWR=(1+|┌ |)/(1-|┌|)	
here ┌ is reflection coefficient.
So   
          |┌ |=  (VSWR-1)/(VSWR+1)=(2-1)/(1+2)=1/3=0.333
So maximum value of reflection coefficient of each device is 0.333 and minimum is -0.333.
Now angle of reflection coefficient= acos(|┌ |)
So Now maximum allowable  Phase angle for each state is at reflection coefficient 0.333 and -0.333
which are 70o  and 109o.
C.

Manual Cascade Calculation with Mismatch Given the cascade shown in Figure 1-40: a. Find the cascade gain assuming the mismatch loss of every component is zero (i.e., each component is perfectly...

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