alard
Member level 4
isolation resistor
hello,
I have a question regarding this article 'A General Design Formula of multi-section Power Divider Based on Singly Terminated Filter Design Theory' on wilkinson power divider design.
Let's take a 4-section power divider just for verifying the formulas.First, I got the impedance of optimum transformer (120% bandwidth ,0.01 ripple). All values have been normalized.
Z=[1.1157 1.2957 1.5435 1.7926];
then
Y=[0.8963 0.77178 0.64788 0.55785];
On the other hand, i calculated the prototype element values for the singly teminated chebyshev lowpass filter, also at the ripple level of 0.01
g=[0.3564 0.8945 1.1547 1.0421] (should be right, already verified)
then according to the formulas in the paper, I got the G values
G=[1.4028 0.0913 3.3695 0.075] which correspond to my final result
R=[0.7129 10.9530 0.2968 13.3419]
However the resistor value that COHN provided in his paper(BROADBAND THREE-PORT TEM-MODE HYBRIDS) is
R=[9.6432 5.8326 3.4524 2.0633]
There must be some misunderstanding or wrong calculation in my above steps. Really makes me confused now. Could someone take some time and help me to check it? Thanks in advance.
Best Regards,
kevin
hello,
I have a question regarding this article 'A General Design Formula of multi-section Power Divider Based on Singly Terminated Filter Design Theory' on wilkinson power divider design.
Let's take a 4-section power divider just for verifying the formulas.First, I got the impedance of optimum transformer (120% bandwidth ,0.01 ripple). All values have been normalized.
Z=[1.1157 1.2957 1.5435 1.7926];
then
Y=[0.8963 0.77178 0.64788 0.55785];
On the other hand, i calculated the prototype element values for the singly teminated chebyshev lowpass filter, also at the ripple level of 0.01
g=[0.3564 0.8945 1.1547 1.0421] (should be right, already verified)
then according to the formulas in the paper, I got the G values
G=[1.4028 0.0913 3.3695 0.075] which correspond to my final result
R=[0.7129 10.9530 0.2968 13.3419]
However the resistor value that COHN provided in his paper(BROADBAND THREE-PORT TEM-MODE HYBRIDS) is
R=[9.6432 5.8326 3.4524 2.0633]
There must be some misunderstanding or wrong calculation in my above steps. Really makes me confused now. Could someone take some time and help me to check it? Thanks in advance.
Best Regards,
kevin