  A surface wave antenna operating in the 2.4 GHz band and efficient for
launching surface electromagnetic waves at metal/dielectric interfaces is
presented. The antenna operation is based on the strong field enhancement at
the antenna tip, which results in efficient excitation of surface waves
propagating along nearby metal surfaces. Since surface electromagnetic waves
may efficiently tunnel through deeply subwavelength channels from inner to
outer metal/dielectric interface of a metal enclosure, this antenna is useful
for broadband radio communication through various conductive enclosures, such
as typical commercial Faraday cages.
