MEEP results not matching the theory for a wire antenna of length 1.25 wavelength

[mechbear14]

Hello everyone. I've been trying to simulate some wire antenna configurations from Antenna Theory Analysis and Design book and having a few problems.

For a wire antenna of half wavelength, the results match the theory perfectly.

Notebook: Wire Antenna.json (Please change the extension to .ipynb...)

For one of a whole wavelength, however, the results deviate from the theory a bit. I adjusted the flux box a bit so that the flux box does not touch the antenna while also keeping the box inside the near-field region.

Notebook: Wire Antenna - 1.0lambda.json

For one of a length of 1.25 $\lambda$, the results are completely off.

Notebook: Wire Antenna - 1.25lambda.json

Did I miss anything in my simulation setup? Thank you.

[mechbear14]

I can't believe I have been such an idiot. The metal wires I set up actually don't radiate. Therefore the radiation pattern I've been getting has always been what's radiated from the point source at the centre ( $I(z)=I_0\delta(x)\delta(y)\delta(z)$ ), which is the dipole shape as expected.