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Omni Antenna

Omni-directional antennas focus their energy equally in all directions. They 

typically have lesser range than a Yagi antenna of similar gain. Omni antennas 

are used in point-to-multipoint applications for the central master unit.

Omni-Directional Antenna

Y

Azimuth

X

Z

Y

Elevation

Z

Y

X

Base Station Radiation Pattern

 

Wireless Antenna Installation Guide  | 

3

Содержание Wireless Antenna

Страница 1: ...oad PO Box 1040 Ottawa IL 61350 USA Phone 815 433 5100 Fax 815 433 5109 www bb elec com Europe Africa Middle East 10 Westlink Commercial Park Oranmore Co Galway Ireland Phone 353 91 792444 Fax 353 91 792445 In the U K call 44 01926 851500 www bb europe com Connecting Your Industrial Devices Simply and Reliably Making Wireless Easy ...

Страница 2: ......

Страница 3: ...our Overall System Gain Required to Meet the Distance 7 Tip 4 KnowYour Signal Losses and the Required Antenna Gain 7 Tip 5 Use the Minimum Cable Length Required 9 Tip 6 Do NotWrap the Cables 9 Tip 7 Use Drip Loops 10 Tip 8 Protect the Antenna Connection 11 Tip 9 Correctly Phase theYagi with Respect to the Omni Base Antenna 11 Tip 10 Correctly PhaseYagis with Respect to Each Other 11 3 AdditionalRe...

Страница 4: ... antennas at both locations for extended range and better signal strength Yagi antennas generate best results in point to multipoint applications when used with remote slave radios High Gain Yagi Antenna Back Front Y X Azimuth Y Z Elevation Z X Yagi Radiating Pattern 1 How to Choose the Right Antenna 2 How to Choose the Right Antenna ...

Страница 5: ...s They typically have lesser range than a Yagi antenna of similar gain Omni antennas are used in point to multipoint applications for the central master unit Omni Directional Antenna Y Azimuth X Z Y Elevation Z Y X Base Station Radiation Pattern Wireless Antenna Installation Guide 3 ...

Страница 6: ... as slaves pointing to the master antenna for the best range and signal strength A typical example is Modbus I O configuration with a Radio Modem connected to an RTU master with several I O nodes as slaves When transmitting a Yagi antenna allows more transmitted power to be sent in the direction of the receiver increasing the received signal strength When receiving a Yagi antenna captures more of ...

Страница 7: ... much as possible Make sure the antennas are high enough above any obstructions in the RF path CORRECT WRONG Line of Sight Line of Sight Obstructions in the lobe of the radio signal Wireless Antenna Installation Guide 5 2 Wireless Antenna Installation Tips SUGGESTED HEIGHT CLEAR OF OBSTRUCTIONS Range 2 4 GHz 900 MHz 868 MHz 1000 ft 300 m 5 5 ft 1 7 m 8 ft 2 5 m 8 5 ft 2 6 m 1 mi 1 6 km 10 5 ft 3 2...

Страница 8: ...h and angle and on the same level plane Yagi Yagi Omni Yagi 1 Parallel 1 Perpendicular to the ground Antennas not aligned Antennas not on the same level plane Antennas not on the same level plane Antennas are backwards Yagi CORRECT ACCEPTABLE WRONG 6 Installation Tips Back Back Front Front CORRECT WRONG ...

Страница 9: ...gain antenna depending on your system requirement The table below shows the signal loss across cables and connections Tip 3 KnowYour Overall System Gain Required to Meet the Distance The more the distance between the radios the more the overall system gain needs to be A quick rule of thumb for the overall system gains vs distance is as below Radio Frequency Wattage 300 ft 100 m 1000 ft 300 m 1 mil...

Страница 10: ... 11 ft 0 429 dB Total 2 929 dB Total Signal Loss Calculation Connectors 4 2 0 dB Lightning Arrestor 1 0 dB Cable 105 ft 4 095 dB Total 7 095 dB LOWER LOSS LONGER RANGE HIGHER LOSS SHORTER RANGE HowToo Many Connectors Affect dB Loss Example Antenna Gain Calculation For a 900 MHz 1W radio to achieve a 5 mile distance Overall gain required 6 dB see Tip 3 Signal lost across a 11 ft antenna cable LMR40...

Страница 11: ...on Guide 9 CORRECT Tip 5 Use the Minimum Cable Length Required Use the minimum cable length required Do not run more cable than needed Tip 6 Do NotWrap the Cables Do not wrap or coil the cables around anything CORRECT WRONG WRONG ...

Страница 12: ...he cabinet This keeps moisture from collecting between the connection joints and in the cabinet itself When using cabinets bottom cable entry is recommended versus side entry Never run the cable in through the top of your cabinet CORRECT WRONG WRONG CORRECT WRONG ...

Страница 13: ...d tape CORRECT WRONG CORRECT WRONG 90 out of phase 90 out of phase Tip 10 Correctly PhaseYagis with Respect to Each Other Make sure Yagis are phased oriented correctly with respect to each other Tip 9 Correctly Phase theYagi with Respect to the Omni Base Antenna Make sure Yagis are phased oriented correctly with respect to the Omni base antenna ...

Страница 14: ...upplied antenna Outdoor Unobstructed Perfect RF conditions Tower to Tower Up to 1 4 mi 2 25 km Supplied antenna no cable Supplied antenna no cable 5 mi 8 km Omni 10 ft 3 m cable Yagi 20 ft 6 m cable Supplied antenna no cable 7 mi 11 2 km Yagi 50 ft 15 m cable Supplied antenna no cable 10 mi 16 km Yagi 20 ft 6 m cable Supplied antenna no cable 14 mi 22 5 km Omni 50 ft 15 m cable Yagi 50 ft 15 m cab...

Страница 15: ... bb europe com In the UK call 44 01926 851500 Wireless Antenna Installation Guide 13 TABLE CONTINUED FROM PAGE 12 2 4 GHz Models 868 900 MHz Models Outdoor Suburban Line of sight but with some obstructions Up to 1100 ft 330 m Supplied antenna no cable Supplied antenna no cable 2900 ft 870 m Omni 10 ft 3 m cable Supplied antenna no cable 1 mi 1 6 km Yagi 20 ft 6 m cable Supplied antenna no cable 1 ...

Страница 16: ...815 433 5109 www bb elec com Europe Africa Middle East 10 Westlink Commercial Park Oranmore Co Galway Ireland Phone 353 91 792444 Fax 353 91 792445 In the U K call 44 01926 851500 www bb europe com Connecting Your Industrial Devices Simply and Reliably Making Wireless Easy Documentation 4310 PN 8912 ...

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