MICROSTRIP ANTENNAS FOR SMALL SATELLITES

AFEEFA.C

Under the guidance of

Mr. ARUN NAsst. Professor

DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING

CALICUT UNIVERSITY INSTITUTE OF ENGINEERING AND TECHNOLOGY

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CONTENTS

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Introduction

Literature Review

Proposed Prototype

Design Layout

Performance Analysis

Advantages

Applications

Conclusion

References

INTRODUCTION

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Microsatellites (10–100 kg), nano-satellites (1–10 kg),

pico-satellites (0.1–1 kg).

Compact microstrip antennas are ideal for small satellites.

Desirable at ultra high frequencies and higher frequencies.

It provide a method of increasing antenna performance.

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Copper traces onto a dielectric substrate in a shape /pattern.

Easy launching, self dependency, versatile and fast.

Microstrip antennas can be designed with desirable

characteristics.

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EXISTING SYSTEMS

Antenna systems

Deployable Antennas

Compact Rover

Antenna

Inflatable Antenna

Band width S-band X-band ka-band,8-12 GHz

Gain 18 dBi 20-25 dBi High gain

Remarkscomplex

deployment,Costly

Antenna array

Made of Mylar, Larger in size

deployment mechanisms.

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PRINTED ANTENNAS Compact, microstrip patch antennas.

The geometries that can be used and combined are limitless.

• Compact Asymmetric Slit Patch Antenna.• Compact Slot-loaded ARMA.• Compact Slotted Microstrip Antenna.• Cross Rhombic Antenna.

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• Rectangular patch• Rogers substrate :1.57-mm thick ,Er

=2.2• Size:80 X 80 mm2

• Coaxial probe fed, CP patch antenna• S-band: 2.285 GHz• Gain: 7.29 dBi

Compact Asymmetric Slit Patch Antenna

• Annular ring • Substrate:30 mm thick, Er =1.07• Size:450 mm• Coaxial probe fed, dual linear

polarized• VHF: 161 MHz• Gain: 5.5 dBi

Compact Slot-loaded ARMA

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• Square patch• RT Substrate:1.57-mm thick :Er =2.2• Size:19.4X16 mm2

• Coplanar waveguide fed• X-band: 7.24 GHz to 8.6 GHz• Gain: 2.7 to 3.4 dBi

Compact Slotted

Microstrip Antenna

•Planar, CP rhombic microstrip•RF60A substrate,0.56 mm thick, Er =6.15 •Size:10X10 cm2, Weight-157 g•Fed in one end and loaded in the other end. •2.4 GHz•Gain: 7.9 dBi

Cross Rhombic Antenna

DESIGN

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ANTENNA CHARACTERISTICS:

High reliability

Small size

Low weight

High efficiency

Low cost.

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Figure 2. Pictorial view of the proposed prototype integration with the HORYU-IV satellite. (a) Side view of antenna 1. (b) Top view of antenna 2.

Figure 1. (a) Proposed design layout. (b) Cross-sectional view.

COMPACT ASYMMETRIC SLIT PATCH ANTENNA

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Fig.(c) Geometry of the slot-loaded ARMA with a microstrip transmission line for impedance matching

Fig.(d) Geometry of the single probe-fed dual-polarized slot-loaded ARMA

Fig.(e) Geometry of the dual probe-fed dual-polarized slot-loaded ARMA

COMPACT SLOT-LOADED ARMA

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COMPACT SLOTTED MICROSTRIP ANTENNA

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CROSS RHOMBIC ANTENNA

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PERFORMANCE ANALYSIS

Performance was first investigated by the EM simulator HFSS 15.

The measurements were carried out using Agilent N5227A network

analyzer.

The impedance and AR bandwidth are sufficient to

cover the HORYU-IV S-band communication requirement.

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Fig.(5) Simulated & measured reflection coefficients

BANDWIDTH

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Fig.(6) Simulated and measured YZ-plane radiation pattern.

RADIATION PATTERN

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Low cost, easily manufactured, electrically small.

Light weight and low profile.

No need for a deployment system.

Geometries can be modified to improve the properties.

CP alleviate orientation related issues.

High-data-rate downlink channel.

ADVANTAGES

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APPLICATIONS

Earth observation, tracking ,telecommunication.

Space exploration.

Military applications, RADARs.

Antenna for a specific space mission and application.

Spacecraft communication and radio science.

CONCLUSION

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Technologies that are currently being used for antenna design

in various applications are evaluated and compared.

The proposed planar antennas as an industry staple.

Require very little mechanical structure.

REFERENCES

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[1] Nasimuddin, X. Qing, and Z. N. Chen, “Compact asymmetric-slit microstrip antennas for circular polarization,” IEEE Trans. Antennas Propag., vol. 59, no. 1, pp. 285–288, Jan. 2011.[2] MacGillivray , C. Boeing, Advanced Network & Space Systems Group. Miniature deployable high gain antenna for cubesats (2011).[3] Z. N. Chen and X. Qing, “Slotted microstrip antennas for circular polarization with compact size,” IEEE Antennas Propag. Mag., vol. 55, no. 2, pp. 124–137, Apr. 2013.[4] S. Gao et al., “Antennas for modern small satellites,” IEEE Antennas Propag. Mag., vol. 51, no. 4, pp. 40–56, Aug. 2009.[5] B. L. Sharma, G. Parmar, M. Kumar, “Design frequency reconfigurable Microstrip patch antenna for s-band Applications,” Reliability, Infocom Technologies and Optimization (ICRITO) (Trends and Future Directions), 2015 4th International Conference, pp. 1– 4 , Noida, Sept.2015.

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THANK YOU