The design and analysis of a pattern-selectable HF antenna located on a US Air Force C-12. The dual-mode antenna can be switched between a long-range sky wave mode and a short-range NVIS mode on the ...

The Fano Load problem illustrates this effect. While the possibility of Negative Gravity was mentioned in the original CFO paper, it was not used until recently when it was injected into optimization ...

This paper presents a metamaterial-based (MM-based) shared-aperture antenna, which is of dual frequencies, conical patterns, vertical polarization and separated channels. The low-frequency (LF) ...