İmplementation of İmpedance Matching by AWR Microwave Office

İmpedance Matching is very important for maximum power transfer.

How can I  make impedance matching?

1-) Capacitor and İnductor.

2-) Stub (Single or Double)


EXAMPLE1
Design a double stub shunt tuner to match a load impedance ZL=60-j80 to a 50 line. The stubs are to be open-circuited stubs, and are spaced / 8 apart. Assuming that this load consists of a series resistor and capacitor, and that the match

 SOLUTİON1
Normalized load admittance: yL=0.3+j0.4. -> construct the rotated 1+jb conductance circle, by moving every point on the g = 1 circle / 8 toward the load => the first stub : b1 = 1.314 ; b1’= -0.114 => Transform the / 8 section of line by rotating along a constant radius (SWR) circle / 8 toward the generator => y2 = 1 - j3.38 ; y2’= 1 + j1.38  The susceptance of the second stub should be b2 = 3.38 ; b2’= -1.38  The lengths of the open-circuited stubs are then found as l1 = 0.146, l2 = 0.482; l1’= 0.204, l2’= 0.350 load impedance => R = 60and C = 0.995 pF

AWR Microwave Office İmplementation

Double stub v1

Double stub v2

Double stub v1 - v2 Simulation results

EXAMPLE2 

Design an L-section matching network to match a series RC load with an impedance

ZL = 200 − j100 to a 100 line at a frequency of 500 MHz.

SOLUTİON2