2. Antennas for GSM System

3. Contents Base station antenna specification and meanings Antenna types and trends

4. (Technical Data)

5. （ Electrical properties ） Operation Frequency Band Input impedance VSWR Polarization Gain Radiation Pattern Horizontal/Vertical beamwidth Downtilt Front/back ratio Sidelobe suppression and null filling Power capability 3rd order Intermodulation Insulation （ Mechanical properties ） Size Weight Radome material Appearance and color Working temperature Storage termperature Windload Connector types Package Size Lightening

6. Electrical properties

7. Wavelength 1/2 Wavelength 1/4 Wavelength 1/2 Wavelength Dipole （ Dipoles ） 1800MHz ： 166mm 900MHz ： 333mm

8. 1 个 dipole (received power) ： 1mW Multiple dipole matrix Received power ： 4 mW GAIN= 10log(4mW/1mW) = 6dBd

9. Gain=10log(8mW/1mW) = 9dBi Sector antenna Received power ： 8mW Omni directional array Received power ： 1mW (Overlook) Antenna

10. （ Frequency Range ） GSM 900 : 890-960MHz GSM 1800 : 1710-1880MHz GSM dual band : 890-960MHz & 1710- 1880MHz eg.824-960MHz ， 1710-1900MHz

11. （ BANDWIDTH ） = 960 - 890 = 70MHz Optimum 1/2 wavelength for dipole at 925MHz at 960 MHz Antenna Dipole at 890 MHz

12. （ Impedance ） 50  Cable 50 ohms Antenna 50 ohms

13. 9.5 W 80 ohms 50 ohms Forward: 10W Backward: 0.5W Return Loss ： 10log(10/0.5) = 13dB VSWR (Voltage Standing Wave Ratio) （ VSWR ）

14. `  1.5 `  =(VSWR-1)/(VSWR+1) `RL=-20lg 

15. （ Polarization ） VerticalHorizontal + 45degree slant - 45degree slant

16. V/H (Vertical/Horizontal)Slant (+/- 45°)

17. ` （ Linear,vertical ） ` （ dual linear  45  slant ）

18. （ Gain ） `G`G （  、  ） =4  U （  、  ） /P A Gain ： dBi `G`G’= G A / G A0 Gain ： dBd `0`0 dBd=2.15 dBi

19. Dipole Ideal radiating dot source (lossless radiator) eg: 0dBd = 2.15dBi dBd and dBi 2.15dB

20. （ Pattern ）

21. （ Beamwidth ） 120° (eg) Peak Peak - 10dB 10dB Beamwidth 60° (eg) Peak Peak - 3dB 3dB Beamwidth

22. （ 3dB Beam width Horizontal ） Directional Antenna ： 65°/90°/105°/120 °Omni ： 360°

23. （ 3dB Beam width Vertical ） Directional ： Omni-directional ：

24. （ Down Tilt ） `Mechanical down tilt `Fixed electronic down tilt `Adjustable electronic down tilt

25. Demonstration of Electronic Down-tilt

26. Non down tiltElectronic downtilt Mechanical downtilt

27. (Electronic and mechanical downtilt)

28. （ Front to Back Ratio ） `Ratio of maximum main lobe to maximum side lobe F/B = 10 log(FP/BP) typically ： 25dB Back powerFront power

29. （ Upper Side lobes Suppression & Null Fill ）

30. （ Side lobes ）

32. （ Permitted Power ） `Continuous :25-1500 watts `peak :n 2  p

33. （ Third Order Intermodulation ） `IMD@2  43dBm `f 1, f 2, 2f 1 -f 2, 2f 2 -f 1 913MHz,936MHz,959MHz,982MHz

34. 1000mW ( 1W) 1mW 10log(1000mW/1mW) = 30dB （ Isolation ）

35. Mechanical properties

36. （ Dimensions ） `L  W  H `Length ： connected with vertical bandwidth and gain `Width ： connected with horizontal bandwidth `Height ： connected with techniques adopted

37. （ Weight ） `Affecting transmission and deploy

38. （ Radome Material ） `PVC, Fiberglass `Anti-temperature 、 water-proof ， anti-aging ， weather resistant

39. （ Colour ） `Good-looking, environment-protecting

41. （ Operating Temperature Range ） ` Typical range ： -40°C — +70°C

42. （ Storage Temperature Range ） ` Typically ： -40°C — +70°C

43. （ Wind Load ） ` Eg: 83N at 160 km/h

44. （ Connector Type ） `7/16”DIN ， N ， SMA `female

45. （ Mast ） `Mast diameter 45-90mm

46. （ Lightening Protection ） `Direct Ground

47. (Antenna Types and Development )

48. (Antenna Types) By frequency band: GSM900, GSM1800, GSM900/1800 By polarization: Vertical, Horizontal, ±45º linear polarization, circle polarization By pattern:Omni-directional, directional By down-tilt:Non, mechanical, electronic adjustment, remote control By function:Transmission, receiving, transceiving

49. (Antenna Development Trend) Broad band Multifunctional High Integrity

51. ONE ANTENNA FOR MULTIPLE BANDS ^870-960MHz and 1710-1880MHz ^Extended band option with 806-960MHz ^Dual slant ±45º polarisation ^65º horizontal beamwidth ^Band independent Teletilt™ control ^17dBi gain in both bands ^Diplexed or Non-Diplexed versions ^Mechanical downtilt mounting option

52. 7/8” （ MAIN FEEDER ）

53. 1/2” （ JUMP CABLE ）

54. 7/16”DIN-F （ DIN CONNECTOR ） 7/16”DIN-M （ DIN & N CONNECTOR ）

55. Lightening Arrestor Rf port 2 Grounding

56. （ ACCESSORIES ） （ Trimming Tool or Hand Tool Kit ） （ Clamp ） （ Earthing Kit ） （ Wall Glands ） （ Hoisting Stocking ） ( Universal Ground Bar)

57. Antenna 7/16 Din Connector 7/8“ Cable Grounding 1/2“ Jumper Cabinet EMP Grounding clip Grounding bar 1/2 Clamp Tower Top Amplifier 7/8“ Cable Machine house 1/2 Jumper

58. Thank you