- #1
userdnl
- 13
- 0
I'm designing a cross yagi as one component of a capstone project. The design I have right now is 3 elements per polarization, counting driven elements (total of 6 elements). I ran a quick 4nec2 simulation of a single polarization (3 elements) using center excitation on the driven element and I'm seeing an impedance between 11 and 12 ohms at the feedpoint. I would like to configure the antenna to be fed for RHCP as described here. I'm trying to figure out what impedance I will observe so that I can design the matching circuit. I'm not sure how to change to a balanced excitation in my nec file or how to attach two 1/4 wavelength long conductors at 90 degrees with each other. Actually, I'm not even sure if it's possible since you usually give a single section of an element to apply excitation to in a nec file. If anyone can comment on how to configure my nec file so I can simulate the impedance or how to find the impedance theoretically I would appreciate it. Thank you