The possible existence of axionlike particles could lead to a new type of long-distance communication. In this work, basic antenna concepts are defined and a Friis-like equation is derived to facilitate long-distance link calculations. An example calculation is presented showing that communication over distances of 1000 km or more may be possible for $m_a<3.5\mathrm{meV}$ and $g_{a\gamma \gamma }>5\times {10}^{-8}{\mathrm{GeV}}^{-1}$.

• Received 4 April 2007

DOI:https://doi.org/10.1103/PhysRevD.76.111701