1. Antennas -- in 50 Minutes or Less! Cynthia Furse Department of Electrical and Computer Engineering Utah State University furse@ece.usu.edu

2. Introduction to Antennas Antenna Parameters Types of Antennas Where to find out more

3. Antenna Parameters Radiation Pattern –Directivity –Gain –Planes ( E or H, Elevation or Azimuth) –Lobes (HPBW, FSLBW, etc.) Input Impedance Link Budget

5. Common Types of Antennas Wire Antennas –Dipoles, Monopoles, Monopoles above Gnd Patch, Printed circuit board antennas Slots, apertures Dishes, Reflector Antennas Arrays

6. Dipole Antenna From:http://www.qth.com/antenna/dipole.gif,plot.gif

7. Folded Dipole From:http://www.qth.com/antenna/fdipole.gif

8. Monopole Antenna From: http://www.letstalk.com//Images/mits-ah-129.GIF

9. Monopole Antenna From:http://www.letstalk.com//Images/5-a.gif

10. Monopole Antenna above Ground =Dipole Antenna

11. V-Antenna v.gif From:http://www.qth.com/antenna/v.gif

12. Loop Antenna From:http://www.downeastmicrowave.com/graphics/kbloop.gif

13. Pagers From: http://www.letstalk.com//Images/13-a.gif

14. Discone Antenna From: http://www.northcountryradio.com/discfig.htm

15. Reflector (Dish) Antenna From: http://www.dssdirectv.com/chanmas1.jpg

16. Arecibo Observatory -- Puerto Rico From: http://www.naic.edu/about/photos/aoviews/tescop.jpg

17. Arecibo Observatory From:http://www.naic.edu/about/photos/aoviews/wideao.jpg

18. Arecibo Observatory From: http://www.naic.edu/about/photos/aoviews/tescop4.jpg

19. Horn Antennas From: http://www.tmo.hp.com/tmo/datasheets/Images/img-HP11966J-1lg.gif

20. Conical Horn Antenna From: http://www.afcsat.com/CH14_MOT2.jpg

21. GPS Antennas From:http://www.lowe.co.uk/gpsant.jpg

22. GPS Antenna From : http://gracie.grdl.noaa.gov/GRD/GPS/Projects/ANTCAL/Models/Images/SENS67157549.s.jpg SEN 67157549 SENSOR SYSTEMS L1

23. GPS Antenna with Choke Ring From:http://gracie.grdl.noaa.gov/GRD/GPS/Projects/ANTCAL/Models/Images/SENS671575+cr.s.jpg SEN 67157549+cr SENSOR SYSTEMS L1 WITH CHOKE RING

24. GPS Antenna LEI AT302 From:http://gracie.grdl.noaa.gov/GRD/GPS/Projects/ANTCAL/Models/LEI_AT302.shtml

25. Antenna Arrays Two Elements -- Pattern adds constructively or destructively From: http://server5550.itd.nrl.navy.mil/projects/HAARP/images/ant/pat1.gif

26. Antenna Arrays More Elements: Higher Directivity Sidelobes From: http://server5550.itd.nrl.navy.mil/projects/HAARP/images/ant/pat2.gif

27. Scanning Antenna Array Changing the phases on the element feeds can make a scanning array. From:http://server5550.itd.nrl.navy.mil/projects/HAARP/images/ant/pat3.gif

28. Arrays From:http://www.qth.com/antenna/tiny2rl.gif

29. Yagi-Uda Arrays From: http://cust.iamerica.net/dwhowell/yagimax.jpg

30. Satellite Antenna Array From:http://www.qth.com/antenna/hfsatrl.gif

31. HAARP Observatory From:http://server5550.itd.nrl.navy.mil/projects/HAARP/images/ohd.jpg HAARP (High frequency Active Auroral Research Program) is to be a major Arctic facility for upper atmospheric and solar-terrestrial research. HAARP is being built on a DoD-owned site near Gakona, Alaska.

32. HAARP Antenna Array From:http://server5550.itd.nrl.navy.mil/projects/HAARP/images/twr/pan2.jpg The HF antenna system to be used for Active Ionospheric Research at the HAARP site will assist other facility instruments in the study the overhead ionosphere. As a result, it too has been designed to optimize or restrict the transmission pattern to lie within a narrow overhead region. To achieve this desirable antenna pattern, the HAARP system uses an "array" of individual antenna elements. The HAARP antenna array is similar or identical to many other types of directive antenna types in use for both military and civilian applications including air traffic control radar systems, long range surveillance systems, steerable communication systems and navigation systems.

33. HAARP -- Feed Sytem From:http://server5550.itd.nrl.navy.mil/projects/ HAARP/images/ant/tpile.jpg

34. HAARP -- Matching Networks From: http://server5550.itd.nrl.navy.mil/projects/HAARP/images/ant/amu.jpg

35. Corner Reflector Antenna From: http://www.northcountryradio.com/crfigs.htm

36. Anything Radiates … Fan-tenna From:http://www.qth.com/antenna/fanfull.gif

37. The Bottom Line ANYTHING radiates. Sometimes you want it to, and sometimes you don’t. To choose an antenna for your design, prepare a LINK BUDGET to determine the necessary gain and directivity of your antenna. Don’t forget MATCHING NETWORKS to prevent reflection between your antenna and your circuit.

38. Antenna References on the Web General: http://www.ee.surrey.ac.uk/Personal/D.Jefferies/antennas.html GPS Antennas Lowe Industries :http://www.lowe.co.uk/antrev2.htmlhttp://www.lowe.co.uk/antrev2.html Antenna Calibration: http://gracie.grdl.noaa.gov/GRD/GPS/Projects/ANTCAL/index.shtml Ham: North Country Radio: http://www.northcountryradio.com/techtips.htm Antenna Elmer: http://www.qth.com/antenna/antenna.htm HAARP Observatory: http://server5550.itd.nrl.navy.mil/projects/HAARP/ant3.html Arecibo Obervatory: http://www.naic.edu/aboutao.htm