Master Thesis

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Abstract The purpose of this thesis work was to design microstrip antennas at 5.8 GHz dedicated short-‐range communication (DSRC) band. This frequency band includes road transport and traffic telematics (RTTT) applications, which impose severe cost and size limitations on microwave RTTT devices. Initially extensive literature study at dedicated short-‐range communication (DSRC) band was done for the selection of antenna, feasible for our interested band which can meet the specification. Later on the selected antennas were designed both in Microwave Office and HFSS. The dielectric substrates used are FR4 and Nelco 4350-‐RF13. Different thicknesses of these dielectrics were used for different antennas. 6
1.1 Kapsch TrafficCom Chapter 1 Overview Kapsch TrafficCom is an international supplier of innovative traffic telematic solutions. The company develops and delivers primarily electronic toll collection systems, especially for multi-‐lane free-‐flow traffic and offers technical and commercial operation of these systems. In addition Kapsch TrafficCom offers traffic management solutions focusing on traffic safety and control, electronic access systems and parking management systems. With references in 41 countries on five continents, and with about 64 million delivered on-‐ board units (OBUs),Kapsch TrafficCom has positioned itself among the leading suppliers of ETC systems worldwide. Kapsch TrafficCom is headquartered in Vienna, Austria, and has subsidiaries and representative offices in 25 countries [15]. 1.2 Products and Components Kapsch TrafficCom designs, develops and manufactures its core technology components in its eight engineering competence centers on 4 continents. The product design philosophy is based on cornerstones of creating high product configurability, standards-‐based interfaces, user-‐friendliness, esthetic, yet robust design. In software and hardware design the company utilizes state of the art technologies [15]. 1.2.1 Multi-‐Lane Transceivers The Kapsch CEN DSRC Multi-‐Lane transceivers are based on the latest processor technology and are designed for maximum lifetime and reliability. The Kapsch multi-‐lane transceivers consist of the following product families: • Kapsch TRX-‐1220 CEN DSRC Multi-‐Lane Transceivers This transceiver platform is optimized for Multi-‐Lane applications on highways. The TRX-‐1220 transceivers are the smallest CEN DSRC transceivers on the market [15]. • Kapsch TRX-‐1230 CEN-‐DSRC Low Power Multi-‐Lane Transceiver The Kapsch TRX-‐1230 Multi-‐Lane transceiver has been designed especially for multi-‐ lane applications on the secondary street network, where no data connection and power connection is available. The TRX-‐1230 has very low power consumption which allows for a power supply via independent power sources (e.g. solar power panels). Data connection to the central system can be done via a GSM/GPRS connection [15]. • Kapsch TS-‐3252 CEN-‐DSRC Multi-‐Lane Transceiver The TS-‐3252 Multi-‐Lane transceiver is equipped with a unique functionality that is able to report the direction to a communicating on-‐board unit (localization 7
Page 1 and 2: Master Thesis Design of Microstrip
Page 3 and 4: Chapter 4 3.1 Introduction………
Page 5: Acknowledgement I would like to exp
Page 9 and 10: The On-‐Board Units above provi
Page 11 and 12: 2.1 Introduction Chapter 2 Introduc
Page 13 and 14: Since this notation frequently caus
Page 15 and 16: 2.5 Antenna Parameters Figure 2.5 A
Page 17 and 18: 2.5.3 Return Loss Return loss is an
Page 19 and 20: 2.5.7 Conversion Gain The conversio
Page 21 and 22: However when the design was optimiz
Page 23 and 24: It can be seen that radiation patte
Page 25 and 26: Similarly, the axial ratio from HFS
Page 27 and 28: Cross Polarization The cross polari
Page 29 and 30: Figure 4.1 (b) Side view of the ant
Page 31 and 32: Gain Figure 4.5 Radiation Pattern f
Page 33 and 34: Similarly axial ratio from HFSS is
Page 35 and 36: Cross polarization Cross polarizati
Page 37 and 38: 5.1 Introduction Chapter 5 Patch An
Page 39 and 40: Similarly return loss in HFSS is sh
Page 41 and 42: Axial Ratio Figure 5.7 Gain (RHCP a
Page 43 and 44: 5.3.2 Measured Results Different me
Page 45 and 46: 6.1 Introduction Chapter 6 Truncate
Page 47 and 48: Cross polarization (a) (b) Figure 6
Page 49 and 50: esults and was centered at 5.8 GHz
Page 51 and 52: Return Loss The return loss for thi
Page 53 and 54: Axial Ratio Axial ratio gives an id
Page 55 and 56: 6.3.5 Simulated Results for Antenna
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Axial Ratio Axial ratio is another
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The results are very identical to t
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Results The simulation results of t
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7.3 Spiral Antenna A spiral antenna
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Axial Ratio The axial ratio plot is
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7.5 Conclusion All three antennas d
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0 -‐2 -‐4 -‐6 -‐8 -
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Similarly the return loss measured
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Chapter 9 Conclusion Different Ante
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X Antenna (with 1.6 mm Substrate) A
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References [1] Per-‐Simon Kilda
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Master Thesis

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