Each antenna algorithm commences by taking the interface parameters from
the microwave source module and defining the user input selections that are
peculiar to each antenna type. The algorithms continue by comparing these
parameters against both air-interface breakdown and far-field criteria.
Adjustments to the aperture, range or other characteristics are made
iteratively until both criteria are satisfied. The algorithms then compute
the main beam width (in both the E- and H-planes), the maximum isotropic
gain and the peak power radiated per steradian. With this information, the
subsequent propagation module can calculate the radiation properties at the
target. The antenna module deals only with the main beam, no sidelobe
information is provided. However, simple models are included to account
for bandwidth mismatches between the antenna and the radiation from the
source, and realistic efficiencies are implicit in the gain formula to
account for main beam energy losses to the sidelobes. The algorithms
conclude by computing the salient antenna dimensions, its mass and total
volume and by assigning a state-of the-art index generally determined from
the antenna’s gain-bandwidth product.

Vlasov mode converter/antenna;  Heimdall

The Vlasov mode converter/antenna is one of the HPM antennas that are
modeled by Heimdall