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Base Station Antenna Considerations in Wireless Network Deployment

Base Station Antenna Considerations in Wireless Network Deployment. By David Shani V.P. Int’ Sales and Marketing With MTI Wireless Edge. The Motivation. Improving the Cost-Performance ratio of a wireless network by using High-Grade base station antennas. Invest few more $, gain many K$.

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Base Station Antenna Considerations in Wireless Network Deployment

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  1. Base Station Antenna Considerations in Wireless Network Deployment By David Shani V.P. Int’ Sales and Marketing With MTI Wireless Edge

  2. The Motivation Improving the Cost-Performance ratio of a wireless network by using High-Grade base station antennas. Invest few more $, gain many K$. ¥-£€$$

  3. Antenna Related Problems • Coverage • Cell Size • Non Line Of Sight • Frequency Reuse • Interference and Co-Existence • Environmental Conditions

  4. Coverage Allows service to as many users as possible to increase revenue.

  5. Cell Size Allows larger cell size to decrease number of base stations.

  6. Non Line Of Sight Allows REASONABLE service to users that are not in line of sight with the base station.

  7. Frequency Reuse Efficient reuse of the same frequency channels.

  8. Interference and Co-Existence Allows co-existence of several networks in the same area with minimum interference.

  9. Environmental Conditions Withstanding severe environmental conditions to minimize failures and maintenance.

  10. Antenna Parameters • Gain (main lobe) • Half Power Beam Width • Side Lobe • Nulls • Front to Back Ratio • Cross Polarization • Environmental Conditions

  11. Radiation Pattern

  12. Elevation Radiation Pattern

  13. Azimuth Radiation Pattern

  14. Gain (Main Lobe) The amplification of the transmitted/received power. The higher the gain is, the longer the possible distance between the user and the base station for effective link. That allows larger cell size and requires less base stations.

  15. Half Power Beam Width The angle of which the main lobe gain is higher then half of the maximum power. The wider/narrower the HPBW is, the wider/narrower the area that can be covered with one antenna That allows an efficient coverage design of the cell.

  16. Side Lobe Level The gain of transmitted/received signal in unwanted directions. The lower the side lobes level are, the less interference received/transmitted and the network efficiency is improved.

  17. Nulls Directions where the antenna gain is very low and signal can not be received/transmitted. With a special technique called “Null Filling” we can improve the antenna coverage.

  18. Null and Null Fill

  19. 30m 244m 120m 78m Main Lobe-Null-Side Lobe

  20. Front to Back Ratio The ratio between the energy radiated forward (wanted) to the energy radiated backwards (unwanted). The higher the ratio is, the less interfering energy transmitted/received from/to the back.

  21. Cross Polarization The suppression of a signal received by the antenna at a perpendicular polarization (unwanted), compared to the same signal if received with the same polarization as the antenna (wanted). Allows spatial separation.

  22. V/F1 H/F1 V/F2 H/F2 V/F3 H/F3 V: Vertical Polarization H: Horizontal Polarization 0o 60o 120o 180o 240o 300o Spatial Separation

  23. The Result

  24. Environmental Conditions • Operating temperature -40°C to +71°C • Vibration IEC 60721-3-4 Random 4M3 • Mechanical shock IEC 60721-3-4 4M3 • Humidity ETSI EN300-2-4 T4.1E • Water tightness IEC529 IP67 • Salt Spray 500 hours per IEC 68 • Solar radiation ASTM G53 • Ice and Snow 25mm radial • Flammability UL-94 V2 • Wind load EN 302-085 (survival 220Km/h, operating 160Km/h)

  25. Summary and Conclusions MTI Wireless Edge, the world leader of flat panel antennas for Fixed Wireless is offering a wide range of High Grade Base Station antennas that can improves a wireless network performance, hence the service availability, which ends with better coverage, translated into improved Return On Investment (ROI).

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