PAPER ON SIW

1. Complementary Inverted Reactive Slot Antenna
Embedded in Single Layer Substrate Integrated
Waveguide (SIW) [ID 4763047]
BY
MONODIP SINGHA ROY and SOURAV MOITRA
REPRESENTED BY
MONODIP SINGHA ROY
BCREC, DURGAPUR
IEMENTECH 2017, KOLKATA
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2. CONTENTS
• Introduction
• Substrate Integrated Waveguide
• Proposed antenna design
• Results (S-parameter & Radiation)
• Modified antenna design
• Results (S-parameter & Radiation)
• Applications
• Parametric results
• Conclusion
• Future Scope
• Reference
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3. INTRODUCTION
• Substrate Integrated Waveguide (SIW) belongs to the clan of substrate integrated
circuits and is fabricated by using two periodic rows of conducting cylinders (via)
and/or slots embedded in a dielectric substrate that connects two parallel metal
plates.
• SIW technology is applied to several microwave and millimeter wave components.
• Non-polar dielectric transmission line were transfigured into corresponding planar
structure such as Substrate Integrated Non-radiating Dielectric Guide (SINRD),etc.
• SIW model also conquer most of the benefits of conventional metallic waveguide,
namely, low loss, complete shielding, high power handling capability and high
quality factor.
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4. SUBSTRATE INTEGRATED WAVEGUIDE
• A post-wall waveguide is formed in a dielectric substrate by densely arraying
metallized posts or via-holes which connect the upper and lower metal plates of the
substrate.
• Fabricated using through-hole techniques where the post walls consists of via
fences.
• The substrate integrated waveguide is known to have similar guided wave and
mode characteristics to the conventional rectangular waveguide with equivalent
guided wavelength.
• Dismisses the probable drawbacks of conventional waveguides.
• Compact in nature.
• Cost effective, easy to fabricate, flexible and light weight.
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5. SIW STRUCTURE
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6. SIW DESIGN EQUATION
The equivalent width of SIW can be obtained from the given relation:
𝒂 = 𝒂 𝒔-
𝒅 𝟐
𝟎.𝟗𝟓𝒑
where,
d= diameter of the holes
p (pitch) =period between two consecutive vias
a= is the center to center distance between via of both the rows
𝒂 𝒔=width of the dielectric field metallic waveguide
Depending on the width of the dielectric filled metallic waveguide, the cutoff
frequency can be calculated :
𝒇 𝒄=
𝒄
𝟐𝒂 𝒔 𝜺 𝒓
where,
c= speed of the light
𝜺 𝒓 = relative permitivity
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7. SIW ANTENNA STRUCTURE
• In this paper, two different models have been used, the basic structure of the
antenna is:
PARAMETER
Dimensions
(mm)
L 38
l1 9.8
l2 7.8
a1 4.9
a2 10.05
a3 10
a4 16.829
a5 12
a6 8
H 1.6
h1 10
h2 3.2
s1 1
s2 1.4913
s3 1.38
d1 0.8
d2 1.1
W 25
Basic structure of the antenna without having
horizontal vias
Dimensions for the proposed
design
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8. S-PARAMETER OF THE BASIC SIW ANTENNA
• Reactive slot SIW antenna embedded with RCV structure without having
horizontal vias , obtained a frequency of 11.394 GHz with RL of 10.1124 dB and
with a gain of 1.26 dB from the radiation pattern.
Magnitude of S-parameter vs frequency
Radiation pattern at a return loss of 11.394
GHz with a gain of 1.26 dB
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9. MODIFIED ANTENNA STRUCTURE
• Additional vias are inserted to enhance the gain as well as the RL of the antenna. Modified
structure of the substrate integrated waveguide antenna mainly focused on the via holes
horizontally situated, the structure:
PARAMET
ER
Dimen
sions
(mm)
L 38
l1 9.8
l2 7.8
a1 4.9
a2 10.05
a3 10
a4 16.829
a5 12
a6 8
d1 0.8
d2 1.1
d3 0.3
H 1.6
h1 10
h2 3.2
h3 4.43
s1 1
s2 0.9
s3 1.4913
s4 1.38
W 25
Basic structure of the antenna with horizontal
vias
Dimensions of the modified design
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10. S-PARAMETER OF MODIFIED SIW ANTENNA
• The modified design embedded with RCV structure with horizontal vias , obtained
a frequency of 10.871 GHz with RL of 19.614 dB and with a gain of 2.45 dB from
the radiation pattern.
Magnitude of S-parameter vs
frequency
Radiation pattern at a return loss of 10.871
GHz with a gain of 2.45 dB
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11. APPLICATIONS
• Accumulated frequencies can be used for X-band communications.
• Antenna resonate at frequency 11.394 GHz can be used as Particle accelerator
powered by X-band RF source.
• At 10.871 GHz, frequency can be used for terrestrial broadband, airborne, etc.
• X-band’s unique position on the RF spectrum permits it to easily support voice,
data, imagery, and HD video – while offering a weatherproof signal.
• X-bands’ properties are so unique that this band is specially reserved for military
and government use only.
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12. PARAMETRIC STUDY-1
Variation of the distance between the RCV and the upper slot with respect to the return loss
of the antenna
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13. PARAMETRIC STUDY-2
Variation of the distance between the RCV and the lower slot with respect to the return
loss of the antenna
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14. CONCLUSIONS
• In this paper a distinct type of strategy has been introduced for designing a
SIW antenna with using the resonating effect of two U-shaped slots and a
RCV.
• The additional effect of induced horizontal via series has also been shown for
increasing the gain of the antenna.
• The positions of the slots are varied from the RCV to enhance the primary
radiation characteristics.
• Successfully reduce the resonating frequency which enhances the performance
of the antenna.
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15. FUTURE SCOPE
• SIW a new type of microwave transmission line and an
open area to inculcate.
• This type of antenna can be studied to develop larger
impedance bandwidth as well as gain.
• The dimensions and positions of the slots and the RCV
can be varied to enhance more radiation characteristics.
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16. REFERENCE
• X. H. Wu and A. A. Kishk, “Analysis and Design of Substrate Integrated
Waveguide using Efficient 2D Hybrid Method” Morgan & Claycool Publishers.
• M. Bozzi, A. Georgiadis and K. Wu, Review of Substrate Integrated Waveguide
Circuits and Antennas, IET Microw. Antennas Propa., 2011, vol. 5, Iss. 8, pp. 909-
920.
• M. Bozzi, F. Xu, D. Deslandes and K. Wu, “Modelling and Design Considerations
for Substrate Integrated Waveguide Circuits and Components”, 8th International
Conference on Telecommunications in Modern Satellite, Cable and Broadcasting
Services, 2007, pp.-vii-xvi.
• W. Hong, B. Lieu, Y. Wang, Q. Lai, H. Tang, X. X. Yin, Y. D. Dong, Y. Zhang and
K. Wu, “Half Mode Substrate Integrated Waveguide: A New Guided Wave
Structure for Microwave and Millimeter Wave Application”, Joint 31st International
Conference on Infrared Millimeter Waves and 14th International Conference on
Terahertz Electronics, 2006, pp.-219
• C. L.Zhong, J. Xu, Z. Y. Yu, M. Y. Wang and J. H. Lee, “Half Mode Substrate
Integrated Waveguide Broadband Band Pass Filter,” Prog. in Electromagnetics
Research s, vol. 4, pp. 131-138, 2008.
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17. THANK YOU
ANY QUESTIONS?
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