Design of K-Band Substrate Integrated Waveguide Coupler, Circulator and Power Divider
Keywords:
Rectangular wave guide, substrate integrated waveguide, HFSS, coupler, circulator, power dividerAbstract
Our study concerns the analysis of K-band passive
devices using a new technology, substrate integrated waveguide
(SIW), by the HFSS code. This technology has been applied
successfully to the conception of planar compact components
for the microwave and millimeter waves applications. This
application focuses on three components: A coupler junction
(-3dB) used for routing, dividing and combining the signals in
the microwave system. The levels of reflection and isolation
below -15dB occupy more than 26.43% of the bandwidth, the
insertion loss S21 and coupling S31 fluctuate between -3.24dB
and -3.78dB, respectively. The SIW ferrite junction circulator
has potential applications in integrated communication and
radar systems. Its frequency response shows reflection losses
below -15 dB in more than 21.75% of the bandwidth, an
insertion loss about -0.65 dB, while the maximum of the
isolation is -38.11dB. The T-junction SIW power divider (-3dB)
indicates that levels of reflection below -15dB occupy more than
26.32% of the bandwidth. The transmission coefficients S21 and
S31 are around -3.54dB, showing equal division of the power
injected into port 1. In this paper, design considerations and
results are discussed and presented.
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