Spacers for Omnidirectional Antennas
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For omnidirectional antennas it has to be taken into account that metal structures in the direct vicinity have a negative, i.e. attenuating influence on the radiation characteristics. Hence, the father from the antenna, the lower the influence of these structures on the radiation characteristics.
Together with the Kathrein company in Rosenheim, Germany, DEHN carried out measurements for evaluating what kind and size of nearby metal structures interfere the radiation characteristics.
When installing an isolated air-termination systems at an omnidirectional antenna it has to be minded that an isolated air-termination rod provides a sufficient protective angle for the antenna to be protected. A sufficient separation distance s has to be kept as well.
Details
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artikelnr. 105363 AH D50 1000 D55.100 STTZN
GTIN 4013364106031, CCT (EU): 85389099, Bruttovægt: 8.87 kg, VPE: 1.00 pc(s)
Teksniske data
Material of support / square profile | St/tZn |
Clamping range (Ø mast) | 55-100 mm |
Clamping range of supporting tube | 50 mm |
Length of spacer | 1000 mm |
Dimensions (w1 x h1 x d1) | 140 x 120 x 55 mm |
artikelnr. 105364 AH D50 1000 D100.150 STTZN
GTIN 4013364106048, CCT (EU): 85389099, Bruttovægt: 10.85 kg, VPE: 1.00 pc(s)
Teksniske data
Material of support / square profile | St/tZn |
Clamping range (Ø mast) | 100-150 mm |
Clamping range of supporting tube | 50 mm |
Length of spacer | 1000 mm |
Dimensions (w1 x h1 x d1) | 190 x 140 x 60 mm |
artikelnr. 105365 AH D50 1000 D150.190 STTZN
GTIN 4013364106055, CCT (EU): 85389099, Bruttovægt: 14.63 kg, VPE: 1.00 pc(s)
Teksniske data
Material of support / square profile | St/tZn |
Clamping range (Ø mast) | 150-190 mm |
Clamping range of supporting tube | 50 mm |
Length of spacer | 1000 mm |
Dimensions (w1 x h1 x d1) | 230 x 180 x 70 mm |