Efficient Design of H-Plane SIW Horn Antenna Array at mm Waves
Abstract
A H-plane Substrate Integrated Waveguide (SIW)
horn antenna with improved performance is
designed in this paper. A modified SIW feeding
technique and corrugated flare is presented for
improvements in the gain, bandwidth, radiation
efficiency and cross-polarization reduction. The
feeding section of the horn antenna uses stepped
transformer for the improvement in the impedance
bandwidth. The corrugated horn section is used to
enhance the radiation characteristics of the
proposed antenna. The center frequency of the
proposed SIW horn antenna is 18.48 GHz. It has a
gain of 8.69 dBi, impedance bandwidth of 2.82 %
and the radiation efficiency of 95.67%.The SIW
based horn antennas are gaining attention over the
waveguide based traditional horn antenna because
its two-dimensional nature making it is easy to
integrate
with other two- dimensional RF
components. Continuous efforts have been made by
antenna engineers to improve the performance of
SIW based horn antenna.
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