a) Does the electrical length in degrees of a quarter wave length T-line depend on frequency (do you need to know the frequency to know its electrical legth)? Why, or why not? b) Find the physical length of Zo1 at 1.5 GHz in centimeters, assuming it consists of a section of microstrip line with an effective dielectric constant of 4. c) Find the input impedance in figure A at 1.5 GHz (note that R is a simple lumped element resistor) ZinA L1 = ___________ cm L1= ? Figure A ZinA = ___________ j ____________ given: i=lambda/4, R=150, theta=90, Zo2=50, Zo1=70, ZL=100