quarter wavelength transformer with series segment
[Z1,Lm] = qwt1(ZL,Z0,type)
[Z1,Lm] = qwt1(ZL,Z0)
impedance of main line and segment L
complex load impedance
'min' or 'max', such that Lm is at voltage minimum or maximum
impedance of quarter-wavelength segment
electrical length of segment to make ZL real
qwt1 implements the design of quarter wavelength transformer with series segment
add sample pgm