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HSMM / 2.4 GHz and Antenna Building Project Night

HSMM / 2.4 GHz and Antenna Building Project Night. Brought to you by The Other Keith (N8XD). Microwave Topics. Devices Amplifiers Locations Test Equipment Transmission Lines Connectors Software Antennas. 2.4 GHz Devices. Cordless Phones. 2.4 GHz Devices. Video Senders.

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HSMM / 2.4 GHz and Antenna Building Project Night

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  1. HSMM / 2.4 GHz andAntenna BuildingProject Night Brought to you by The Other Keith (N8XD)

  2. Microwave Topics • Devices • Amplifiers • Locations • Test Equipment • Transmission Lines • Connectors • Software • Antennas

  3. 2.4 GHz Devices • Cordless Phones

  4. 2.4 GHz Devices • Video Senders

  5. 2.4 GHz Devices • WiFi

  6. 2.4 GHz Devices • Bluetooth and ZigBee

  7. 2.4 GHz Devices • Wireless Cameras

  8. 2.4 GHz Devices • WiMax

  9. 2.4 GHz Devices • Satellites

  10. 2.4 GHz Devices • Microwave Ovens

  11. Signal Bandwidth

  12. Linear Horizontal Vertical Elliptical Left hand Right hand Polarization

  13. Linear Horizontal Vertical Elliptical (circular) Left hand Right hand Horiz. vs Vert. (20db loss) Eliptical vs Linear (3db loss) Left vs Right (20db loss) Mis-Polarization

  14. Amplifiers • RF Amplifiers • Low Noise Amplifiers (LNA) for receiving small signals • Power Amplifiers for transmitting

  15. Amplifiers • Location

  16. Amplifiers • Bias-Tee (Power Injector, etc)

  17. Obstacles at 2.4 GHz • Anything Solid • Trees / Leaves • Buildings • Water?

  18. Water Vapor

  19. Wave Meter Frequency Counter Test Equipment

  20. Test Equipment • RF Power Meter

  21. Test Equipment • Signal Source • VCO • Harmonic Multiplier • Gunn Diode • Video Sender • Cordless Phone

  22. VSWR • Directional Coupler

  23. Transmission Lines • Waveguide

  24. Transmission Lines • Coax

  25. Microstrip Stripline Transmission Lines

  26. SMA RP-SMA RF Connectors

  27. RF Connectors • N – Connector

  28. RF Connectors

  29. Antennas • Waveguide Antennas

  30. Antennas • Waveguide Antennas (Horns)

  31. Antennas • PCB Yagi

  32. Antennas • PCB Patch

  33. Antennas • PCB Log Periodic

  34. Antennas • 1/4 Wave (31 mm)

  35. Antennas • Helical

  36. Antennas • Collinear

  37. Antennas • Parabolic Cylinder

  38. Antennas • Corner Reflector

  39. Antennas • Dish

  40. Link Budget

  41. Link Budget Software

  42. Software • Fresnel Zone (60%)

  43. Construction • Measurements for a 3-1/4” diameter • Probe Length = 1.21” (31mm) • Set 2.49” from back of can (63mm)

  44. Multimedia Software • Conf (NetMeeting) • Windows Start Button • Find “Run” on the menu • Type in “conf” and press enter • Sends Voice and Video over a network – in this case, wireless.

  45. Testing Methods • VSWR

  46. Testing Methods • VSWR Measurement • FP = Forward Power • RP = Reverse Power 1+sqr(RP/FP) VSWR = ---------------- 1-sqr(RP/FP) Definition: impedance mismatch between transmission line and load

  47. Testing Methods • VSWR Measurement Example • FP = .18 mW • RP = .05 mW 1+sqr(.05/.18) VSWR = ---------------- = 3.25:1 1-sqr(.05/.18)

  48. Testing Methods • VSWR Mismatch Effects

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