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Design and Implementation of Log-Periodic Antenna

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Design and Implementation of Log-Periodic Antenna

  1. 1. Project Title : Design and implementation of Log- Periodic antenna Name of the students : PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication  1. Shruti Nadkarni  2. Sneha Vyawahare  3. Gargi .R. Mohokar  Sponsored by : University of Pune  Project Guide: Mrs.D.P Adhyapak
  2. 2. Features  directivity is more robust  self-similar relation between the lengths, separations and widths of the elements  potential for improvement of both directivity and operational bandwidth over classical Yagi–Uda designs PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  3. 3. Block diagram and Specifications PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  4. 4. specifications Properties Values No of log-periodic antennas 4 Frequency range 350 to 1500 MHz Bandwidth 1150MHz Gain 7 to 8 dBi No of elements 20 Height 543mm Width 500mm RF switch 4:1 PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  5. 5. Methodology used  Finite element method  Numerical technique for finding approximate solutions to boundary value problems.  In CST, any conducting surface is divided into small areas called cells, collectively known as mesh.  Then it calculates electric field density for each cell independently.  Further , it calculates the electric field density for the complete mesh, and thus gives the final result. PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  6. 6. Implementation  CST microwave studio  Finite element method  Material used: aluminium  Two square booms of 6*6mm  20 elements of 3mm diameter PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  7. 7. Contd…. Radiation pattern at 1150Mhz S parameter results PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  8. 8. Radiation pattern at 550Mhz Radiation pattern at 925Mhz PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  9. 9. Project outcomes and its contribution to communication society  For direction finding to identify sources of disruptive signals.  To monitor local radio frequency interference for critical applications.  To identify man-made interference to sensitive radio- astronomy instruments like the Giant Metre-wave Radio Telescope (GMRT). PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  10. 10. IEEE Communication Project Competition  For building early warning systems for coastal surveillance.  To detect local sources which are saturating or interfering with our signals of interest. PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  11. 11. Conclusion  highly directional antennas with high gain.  identify the source of disruptive signals.  The radio frequency interference is also needed to be known to prevent the original signal from getting disrupted.  All these requirements are accomplished using log periodic antenna which we have designed for a frequency range of 350MHz to 1500MHz using CST. PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  12. 12. References IEEE Communication Project Competition  A. O. Benz .E C. Monstein. H. Meyer. P. K. Manoharan. R. Ramesh. A. Altyntsev. A Lara. J. Paez. K.-S. Cho, “A World- Wide Net of Solar Radio Spectrometers: e-CALLISTO”, 10 April 2008.  C Balanis, “Antenna Theory Analysis and design” Wiley, 2005  J. D. Kraus, “Antennas”, Mc Graw Hill.  http://www.radio-electronics.com  NOWATZKY, D.: Logarithmisch periodische Antennen. Technische Mitteilungen des RFZ, Jahrg. 7/Heft 2, June 1963, pp. 77-80, and Jahrg. 7/Heft 3, Sept. 1963, pp. 127-133. PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  13. 13. IEEE Communication Project Competition  SEVERNS, R., BEEZLEY, B., HARE, E.: Log Periodic Arrays. In The ARRL Antenna Book [CD-ROM]. The American Radio Relay League, Inc. Newington, CT 06111- 1494.  BANIC, B., HAJACH, P.: Design and Simulation of Properties of Log-Periodic Dipole Antenna. In Radioelektronika 2000, Bratislava, 12-16. Sept. 2000, pp. P_108-P_109.  C. A. Chen and D. K. Cheng, “Optimum Element Lengths for Yagi-Uda Arrays. ”  IEEE Trans. Antennas propag., Vol. AP-23, pp. 8-15, January 1975. PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication
  14. 14. Thank You PES’s Modern College of Engineering, Shivajinagar, pune-5. Department of Electronics and Telecommunication

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