1. VIII.CDMA Antenna & Feeder System

10. Dipoles Wavelength 1/2 Wavelength 1/4 Wavelength 1/4 Wavelength 1/2 Wavelength Dipole 1800MHz ： 166 mm 900MHz ： 333mm

11. Gain = 10log(4mW/1mW) = 6dBd one dipole Received Power ： 1mW Dipole array Received Power ： 4 mW

12. 10log(8mW/1mW) = 9dBd Sector antenna Received Power ： 8mW Omnidirectional array Received Power ： 4mW (top view) Antenna

14. BANDWIDTH = 896 - 824 = 72MHz Optimum 1/2 wavelength for dipole at 860MHz at 896 MHz Antenna Dipole at 824 MHz

16. 9.5 W Forward: 10W Reverse: 0.5W Return Loss ： 10log(10/0.5) = 13dB VSWR (Voltage Standing Wave Ratio) VSWR 80 ohms 50 ohms

18. Polarization Vertical Horizontal Vertical Polarization: The electric field is vertical to the ground Horizontal Polarization: The electric field is parallel to the ground

19. + 45degree slant - 45degree slant

20. Dual Linear Polarization V/H (Vertical/Horizontal) Slant (+/- 45°)

21.  Linear,vertical  dual linear  45  slant

23. Gain G: Antenna gain S 1 : P ower density at a distant point relative to antenna S 0 : Power density at the same point relative to isotropic antenna P in1 :Input power of the antenna P in0 :Input power of the isotropic antenna

24. Gain Unless otherwise specified, the gain usually refers to the direction of maximum radiation.

25. Antenna gain is usually expressed in dBi or dBd dBi Gain relative to an isotropic antenna when the reference antenna is an isotropic antenna. dBd Gain relative to a half-wave dipole when the reference antenna is a half-wave dipole. Gain

26. dBd and dBi half-wave dipole isotropic radiator So 0dBd = 2.15dBi 2.15dB

27. A directional antenna An Omni-directional antenna Directional & Omni-directional Antenna

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

30. Vertical Beam width Directional Antenna ： Omni Antenna ：

31. Down Tilt  Mechanical downtilt  Fixed electr. downtilt  Tunable electr. downtilt

32. Mechanical Down tilt  Adjust antenna mechanically to tilt lobe down

33. Front to Back Ratio  Main lobe max. value to back lobe max. value ratio F/B = 10 log(forward Power/Reversed Power) typically ： 25dB Reversed Power Forward Power

34. Upper Side Lobes Suppression & Null Fill

35. Side lobes Upper Side Lobe Suppression ( dB)

36. Null Fill

37. Power Capacity  Continuous :25-1500watts  Typical: 250-500watts

38. 1000mW ( 1W) 1mW 10log(1000mW/1mW) = 30dB Antenna Port Isolation

39.  For same frequency 、 dual frequency ， isolation of different port >30dB

41. Dimensions  Length  Width  Depth  Length ： related with vertical beamwidth 、 gain  Width ： related with horizontal beamwidth  Depth ： related with adoptive technology

42. Weight  Affect Transportation 、 construction

43. Radome Material  PVC, ABS, fiberglass  Sun Protection 、 Ice Protection ， Salt protection  Burning Blocking ， Anti-aging etc.

44. Operating Temperature Range  Typical ： -40°C — +70°C

45. Storage Temperature Range  Typical ： -40°C — +70°C

46. Shipping Dimensions  Length  Width  Depth

47. Mast  Mast diameter: 45-90mm

48. Lightning Protection  DC Grounded

51. Antenna Types A directional antenna An Omni-directional antenna

57. The main feeder

59. Lightning arrester For the wide-band lightning arrester that need not be grounded separately, you may directly connect it in serial to the place between the main feeder and the indoor cabinet top jumper. During the installation, the lightning arrester and indoor equipment as the cabling rack should be insulated.

61. Lightning Arrester For the lightning arrester that need be grounded, a lightning arrester frame should be provided.

62. The installation of the lightning arrester frame

63. Connector between two accessories Feeder connector

65. GPS Antenna Feeder System Composition of the GPS Antenna Feeder System