Antenna.pdf

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Cellular Systems

Technical Information

and New Products

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Kathrein Xpol antennas for polarization diversity represent the latest development stage in anten-na technology. An ever increasing number of net-work operators are coming to appreciate the real advantages of only having to install 3 dual +/- 45° polarized antennas for a complete 3 sector site, where previously 6 or 9 vertically polarized anten-nas had to be installed.

For polarization diversity to function properly it is very important that the different polarized signals are as independent as possible of each other (principle of uncorrelated signals). The most

so-called “Cross-polar ratio (CPR)“, i.e. the ratio of the signal levels of similar polarizations com-pared to dissimilar polarizations. The CPR should be quoted for the whole sector width (+/- 60°), not just for the main radiating direction.

The antenna gain is already considerably redu-ced at the sector edges, therefore a CPR as high as possible is desired. The system suppliers demand at least 10 dB for +/- 60° from the main direction. Kathrein Xpol antennas more than fulfil these requirements in this critical area.

Advanced Xpol Antenna Standards

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Most of the Xpol antennas on the market are based on the so-called patch technology and on printed circuit boards for power-splitting purpo-ses. Kathrein, however, have for many years used the proven dipole-type technology together with a low-loss cable harness, which clearly offers more opportunities for perfecting certain antenna characteristics.

We present the new, so-called „A-Panels“ as our concept for the 900 MHz Xpol antenna range. We adapted the excellent and well proven mechani-cal design used in our range of GSM 1800 anten-nas for these A-Panels. Instead of a fibre-glass cover screwed and sealed to an aluminium

back-plate, the radome now consists of a closed, self-supporting fibre-glass profile into which the metal parts of the antenna are inserted. There are no drill-holes at all in the profile which is closed by two end caps with short sealing rings. This com-pletely closed design offers ideal permanent pro-tection against environmental influences and also increases the mechanical stability of the anten-nas.

Apart from the existing comprehensive range of Xpol antennas which can be found in our catalo-gues, we now also have low gain versions for GSM 900 with a length of 656 mm.

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TypeNo. 739620

Input 2 x 7-16 female Connector position Bottom or top Frequency range 806 – 960 MHz VSWR < 1.5 Gain 2 x 12.5 dBi (870 – 960 MHz) 2 x 12 dBi (806 – 870 MHz) Impedance 50Ω Polarization +45°, -45° Front-to-back-ratio, copolar > 30 dB Half-power beam width +45°polarization

Horizontal: 65°, vertical: 27° -45°polarization Horizontal: 65°, vertical: 27° Isolation > 30 dB

Max. power per input 500 Watt (at 50 °C ambient temperature)

Weight 6 kg

Wind load Frontal: 110 N (at 150 km/h) Lateral: 60 N (at 150 km/h) Rearside: 240 N (at 150 km/h)

Eurocell A-Panel – Dual Polarization

65°Half-power Beam Width

739 620

Two independent systems for +45°and -45°polarization

XPol A-Panel 800/900 65°12.5dBi

-45° +45° 58 262 1 1 6 64 72 9 7 5 0 7 1 0 6 5 6 Bottom view

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TypeNo. 739646

Input 2 x 7-16 female Connector position Bottom or top Frequency range 806 – 960 MHz VSWR < 1.5 Gain 2 x 11 dBi (870 – 960 MHz) 2 x 10.5 dBi (806 – 870 MHz) Impedance 50Ω Polarization +45°, -45° Front-to-back-ratio, copolar > 25 dB Half-power beam width +45°polarization

Horizontal: 90°, vertical: 36° -45°polarization Horizontal: 90°, vertical: 36° Isolation > 30 dB

Max. power per input 500 Watt (at 50 °C ambient temperature)

Weight 6 kg

Eurocell A-Panel – Dual Polarization

90°Half-power Beam Width

739 646

Two independent systems for +45°and -45°polarization

XPol A-Panel 800/900 90°11dBi

-45° +45° 58 262 1 1 6 64 72 9 7 5 0 7 1 0 6 5 6 Bottom view

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The demand for Dual Band Antennas is constant-ly increasing as ever more GSM 900 operators are also getting GSM 1800 licences. A few simple versions are already available on the market, i.e. versions for vertical polarization or antennas with dual-polarization, where the 900 MHz and 1800 MHz systems are arranged separately, one above the other. At the end of 1998 resp.

begin-ning of 1999 Kathrein will be launching sophisti-cated Dual Band Antennas which are able to ope-rate in the cross-polarization mode with interlocked radiating elements for both 900 MHz and 1800 MHz, whereby the antenna length is determinated by a single band 900 MHz version. Moreover, two different versions will be available:

Dual Band Xpol Antennas for GSM 900 and GSM 1800

Circuit diagram A XXPol Dual Band Antenna

_

Circuit diagram B XXPol Dual Band Antenna

Two Dual Band Combiners (C) are integrated

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1. Only one antenna is required for both bands. 2. All the advantages of Kathrein’s single band Xpol antennas also apply to Kathrein’s Dual Band Antennas.

3. The dimensions are identical to those of a pure 900 MHz Antenna. If an existing GSM 900 station is extended to become a GSM 900 / 1800 station the appearance, wind load and the type of attach-ment will all remain unaltered.

4. The solution using integrated combiners leads to considerable savings in feeder cables; if an existing site is upgraded no further feeder cables are required apart from those already installed. 5. The enclosed data sheets nos. 741 320 / 741 322 and 741 326 / 741 327 show antenna versi-ons of 1.3 m and 2 m length. We are also plan-ning to introduce further versions with lengths of 0.65 m und 2.6 m.

Kathrein Dual Band Antennas therefore offer the following advantages:

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TypeNo. 741320

Frequency range GSM 900: GSM 1800: 870 – 960 MHz 1710 – 1880 MHz VSWR <1.5 <1.5 Gain 2 x 15 dBi 2 x 17 dBi

Impedance 50Ω 50Ω

Polarization +45°, -45° +45°, -45° Front-to-back-ratio (copolar) > 30 dB > 30 dB Half-power beam width +45°/ -45° +45°/ -45°

– Horizontal: 65° – Horizontal: 60° – Vertical: 14° – Vertical: 8° Max. power 250 Watt 150 Watt

(at 50 °C ambient temperature) Isolation > 30 dB

Input 2 x 7-16 female Connector position Bottom or top

Weight 13 kg

Eurocell A-Panel – Dual Polarization

Dual Band GSM 900 / 1800 MHz Antenna

65°Half-power Beam Width, Type No. 741 320

XXPol A-Panel 900/1800 C 65°/60° 15/17dBi

64 72 9 1 3 9 0 1 3 5 0 1 2 9 6

Four independent systems: GSM 900 +45°Polarization

GSM 1800 +45°Polarization with integrated dual band combiner to one 7-16 female input GSM 900 –45°Polarization

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TypeNo. 741326

Frequency range GSM 900: GSM 1800: 870 – 960 MHz 1710 – 1880 MHz VSWR <1.5 <1.5 Gain 2 x 15 dBi 2 x 17 dBi

– Horizontal: 65° – Horizontal: 60° – Vertical: 14° – Vertical: 8° Max. power per input 400 Watt 200 Watt

(at 50 °C ambient temperature) Isolation > 30 dB (GSM 900 – GSM 900)9

> 30 dB (GSM 1800 – GSM 1800) > 30 dB (GSM 900 – GSM 1800) Input 4 x 7-16 female

Connector position Bottom or top

Weight 13 kg

Wind load Fr tal 220 N ( t 150 k /h)

Eurocell A-Panel – Dual Polarization

Dual Band GSM 900 / 1800 MHz Antenna

65°Half-power Beam Width, Type-No. 741 326

Four independent systems: GSM 900: +45°Polarization GSM 900: –45°Polarization GSM 1800: +45°Polarization GSM 1800: –45°Polarization XXPol A-Panel 900/1800 65°/60° 15/17dBi

64 72 9 1 3 9 0 1 3 5 0 1 2 9 6

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TypeNo. 741322

Frequency range GSM 900: GSM 1800: 870 – 960 MHz 1710 – 1880 MHz VSWR <1.5 <1.5 Gain 2 x 17 dBi 2 x 18.5 dBi

– Horizontal: 65° – Horizontal: 60° – Vertical: 9° – Vertical: 5.5° Max. power 250 Watt 150 Watt

(at 50 °C ambient temperature) Isolation > 30 dB

Input 2 x 7-16 female Connector position Bottom or top

Weight 19 kg

Eurocell A-Panel – Dual Polarization

Dual Band GSM 900 / 1800 MHz Antenna

65°Half-power Beam Width, Type No. 741 322

XXPol A-Panel 900/1800 C 65°/60° 17/18.5dBi

64 72 9 2 0 3 0 1 9 9 0 1 9 3 6

Four independent systems: GSM 900 +45°Polarization

GSM 1800 +45°Polarization with integrated dual band combiner to one 7-16 female input GSM 900 –45°Polarization

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64 72 9 2 0 3 0 1 9 9 0 1 9 3 6 TypeNo. 741327 Frequency range GSM 900: GSM 1800: 870 – 960 MHz 1710 – 1880 MHz VSWR <1.5 <1.5 Gain 2 x 17 dBi 2 x 18.5 dBi

– Horizontal: 65° – Horizontal: 60° – Vertical: 9° – Vertical: 5.5° Max. power per input 400 Watt 200 Watt

(at 50 °C ambient temperature) Isolation > 30 dB (GSM 900 – GSM 900)9

> 30 dB (GSM 1800 – GSM 1800) > 30 dB (GSM 900 – GSM 1800) Input 4 x 7-16 female

Connector position Bottom or top

Weight 19 kg

Wind load Fr tal 330 N ( t 150 k /h)

Eurocell A-Panel – Dual Polarization

Dual Band GSM 900 / 1800 MHz Antenna

65°Half-power Beam Width, Type-No. 741 327

Four independent systems: GSM 900: +45°Polarization GSM 900: –45°Polarization GSM 1800: +45°Polarization GSM 1800: –45°Polarization XXPol A-Panel 900/1800 65°/60° 17/18.5dBi

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Unobtrusive omni antennas for both GSM 900 and GSM 1800 are now available especially for microcell applications. These versions are similar

to our Indoor Antennas, but are suitable for out-door operation and are fitted with an N connector.

Omni Antennas for Microcell Outdoor Systems

Our existing tool 735 700 is only suitable for use with the F-Panel product range. The adjustment tool 738 440 can now be used for positioning all

directional antennas in the 800 / 900 MHz range as well as the 1800 / 1900 MHz range (Eurocell antennas, A-Panels, F-Panels).

Azimuth Adjustment Tool for all Eurocell Panel Types

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Omnidirectional Antenna – Vertical Polarization

Indoor and outdoor use

738 450

TypeNo. 738450

Input N female

Connector position Bottom or top Frequency range 870 – 960 MHz

VSWR < 1.5

Gain 2 dBi

Impedance 50Ω

Polarization Vertical

Max. power 150 Watt (at 50 °C ambient temperature)

Weight 200 g

Radome diameter 20 mm

Height 180 mm

Omni 900 360°2dBi

Material: Radiator: Brass.

Radome: Fiberglass, colour: White.

Mounting: One hole mounting (16 mm diameter) to surfa-ces of max. 10 mm thickness.

1 8 0 m

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Omnidirectional Antenna PCN / DECT

Vertical Polarization – Indoor and outdoor use

738 451

TypeNo. 738451

Input N female

Connector position Bottom or top Frequency range 1710 – 1900 MHz

VSWR < 1.5

Gain 2 dBi

Impedance 50Ω

Polarization Vertical

Max. power 100 Watt (at 50 °C ambient temperature)

Weight 150 g

Radome diameter 20 mm

Height 120 mm

Omni 1800 360°2dBi

Material: Radiator: Brass.

Radome: Fiberglass, colour: White.

Mounting: One hole mounting (16 mm diameter) to surfa-ces of max. 10 mm thickness.

Grounding: All metal parts of the antenna as well as the

1 2 0 m

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Elevation compensation Precise azimuth adjustment for mast mounted antennas can easily be achieved by using the azimuth

adjustment tool.

Azimuth Adjustment Tool

738 440

This tool is suitable to all types of Eurocell Panels • Panels • A-Panels • F-Panels • XPol F-Panels F-Panel Clamping device Scale A-Panel Target object

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9 9 8 5 . 6 3 5 4 / 1 1 / 9 8 / 1 , 5 / Z W T / H A S u b j e c t t o a l t e r a t i o n . A n t e n n e n · E l e c t r o n i c K A T H R E I N - W e r k e K G . T e l e f o n ( 0 ) 8 0 3 1 / 1 8 4 - 0 . F a x ( 0 ) 8 0 3 1 / 1 8 4 - 9 9 1 A n t o n - K a t h r e i n - S t r a ß e 1 – 3 . P o s t f a c h 1 0 0 4 4 4 . D - 8 3 0 0 4 R o s e n h e i m MECHANICAL ELECTRICAL 3 d B 10 -90° 0° +90 3 d B 10 -90° 0° +90

 _{Downtilt angle varies over the azimuth range:}

set downtilt angle only in main direction (0°),

no downtilt in tilt axis direction (+/-90°from main beam).

 _{Horizontal half-power beam width increases with}

rising downtilt angle.

 _{Resulting gain reduction depends on azimuth direction}

(can rarely be considered in network planning).

 _{Constant downtilt angle over the whole azimuth range.}

 _{Horizontal half-power beam independent of}

downtilt angle.

 _{Identical gain reduction for all azimuth directions.}

0° 6° 8° 10°

COMPARISON OF MECHANICAL AND ELECTRICAL DOWNTILT

HORIZONTAL RADIATION PATTERN IN THE HORIZONTAL PLANE