UWB gain enhancement of horn antennas using miniaturized frequency selective surface
Citation
Belen, M. A., Güneş, F., Mahouti, P., & Belen, A. (2018). UWB Gain Enhancement of Horn Antennas Using Miniaturized Frequency Selective Surface. Applied Computational Electromagnetics Society Journal, 33(9), 997–1002.Abstract
In this work, enhancement of the radiation
performances of horn antennas are worked out within
their operation bandwidth by placing the miniaturized
Frequency Selective Surface (FSS)s perpendicularly into
the inner part of their flares. Here each FSS consists of
only a single miniaturized double-sided inverted Tshaped square unit cell designed on the low-cost FR4
with relative permittivity 4.4, loss tangent 0.0035 and
thickness 1.58 mm in 3D CST environment so that it is
able to focus the propagating electromagnetic waves to
increase the directivity properties like a dielectric lens,
while keeping the mismatching characteristics with less
size and low manufacturing cost compared to its counter
parts. Herein an exponentially tapered TEM horn with
the operation bandwidth of 5-13 GHz is taken as an
example horn antenna for measurements. From the
measured results of the prototyped module, it can be
observed that the proposed module keep mismatching
characteristics of the horn antenna, meanwhile the gain
and beam widths are enhanced to amplify the signal in
the operation band without any increase in the total
volume of the module or making the design bulky. Thus,
it is expected that this methodology can be implemented
to horn antennas effectively reducing volume and cost of
communication systems