Given a 9-volt source with impedance Rs = 25Ω is connected to a transmission line with Z0 = 50Ω, length = 0.1m and Vp = 1*108 m/s followed by a load ZL = 75Ω calculate.

mathematics

Description

This question is about transmission lines and matching 

(a) Given a 9-volt source with impedance Rs = 25Ω is connected to a transmission line with Z0 = 50Ω, length = 0.1m and Vp = 1*108 m/s followed by a load ZL = 75Ω calculate. 

(i)  The initial voltage on the line. 

[1 mark] 


(ii)  The voltage at the load after 5T (where T is the time taken to travel from one end of the line to the other), sketch a bounce diagram 


(iii)  The voltage the line will settle to. 


(iv)  When and why are transmission lines required? 


Question 2 continued 

(b) Given the PCB mounted 200MHz chip antenna shown in Figure 2 and a measured value of 20+70j design an L match. State all assumptions. 

Matching circuit 

         

Length =7.2cm 

Figure 2 PCB chip antenna with matching area. 


Instruction Files

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