Antenna Design for Directivity-Enhanced Raman Spectroscopy
Figure 2
(a) Dipole antenna over ground with two parasitic reflectors 150 nm long and 100 nm from the feed element. (b) Dipole antenna over ground plane with a square reflector of length 500 nm (square waveguide antenna). (c) Dipole antenna over ground plane with a circular reflector of radius 250 nm (circular waveguide antenna).
