Title :
Some theoretical results for surface wave launchers
Author_Institution :
University College, London, England
fDate :
12/1/1959 12:00:00 AM
Abstract :
The design of surface wave launchers is examined and it is shown that the efficiency of a launcher of finite size can approach arbitrarily near to 100 per cent. For a given size of launcher, there is however a limit to the efficiency above which an increase is obtained only at the expense of frequency bandwidth. Launchers with efficiencies above this limit are classed as "super-efficient" by analogy with "super-gain" aerials. A general solution for an end-fire launcher is also given.
Keywords :
Electromagnetic surface waves; Surface electromagnetic waves; Apertures; Bandwidth; Conductors; Diffraction; Educational institutions; Equations; Frequency; Power measurement; Strips; Surface waves;
Journal_Title :
Antennas and Propagation, IRE Transactions on
DOI :
10.1109/TAP.1959.1144746
