Antenna Isolation

Antenna Isolation Donor Signal

Isolation >= Gain + 13 dB

Service Area

Gain 45-90 dB RF-Repeater

Antenna Isolation BTS

Donor signal

Important: • Opening angle ! • High front to back ratio !

RFR

service area

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Antenna Isolation BTS

Donor signal

Important: • Opening angle ! • High front to back ratio ! • Choice of donor-site !

RFR

service area

Antenna Isolation Important: • Opening angle ! 20 wavelengths?

• High front to back ratio ! • Choice of donor-site ! • Vertical spacing !

2

Antenna Isolation

•

At least Gain repeater + 13 dB (margin)

Achieved by :

•

Right choice of antennas – Opening angle – Front to back ratio

•

Right choice of donor BTS (direction)

•

Right placement of antennas (spacing)

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