Abstract: An example antenna and methods of transmitting and receiving signals are provided herein. In some embodiments, the antenna may include a metamaterial. In some embodiments, the metamaterial may include a plurality of magnetic layers. In this regard, the plurality of magnetic layers may be orientated along an axial direction of the metamaterial. In some embodiments, each of the plurality of magnetic layers may include a plurality of magnetic particles dispersed in a dielectric. In some embodiments, the antenna may include an electrical conductor. In this regard, the electrical conductor may include a coil that surrounds the metamaterial. In some embodiments, the antenna may be configured to transmit and/or receive signals having a frequency in the high frequency (HF) range.

Abstract: A combination antenna for aircraft application is disclosed. The antenna has a shell similar to that of a conventional VHF communication antenna, but it houses a monopole VHF and a volute GPS antennas. Provisions are made to enable the GPS antenna to be situated beneath the VHF antenna, but yet have full view of the upper hemisphere and avoid interference even though no structural shielding is provided. The combination antenna is mountable on the pre-existing base used for the conventional single VHF communication antenna and is operable with the pre-existing cable used to transmit the signal of the replaced single VHF communication antenna.