5 Kathrein_Features.pdf

8/10/2019 5 Kathrein_Features.pdf

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Kathrein MS Lautner 06-08

Kathrein Features

Relevant antenna characteristics

for Xpol antennas

Electrical and mechanical benefits

and designe criterias

ofKATHREIN antennas


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Kathrein Features Increasing requirements

Antennas have to fulfill stringent specifications for the growing complexity of

modern networks regarding

-

adjustable electrical

downtilt

(specifically for UMTS / IMT 2000)

-

radiation pattern exactness (influenced by the squint-

and tracking performance)

-

cross polar ratio (dual polarization)

- isolation

-

intermodulation-

mechanical performance

These characteristics have to meet the specifications-

over the whole frequency range

-

over the whole temperature range and other environmental influences

-

over the whole range of adjustable downtilt


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Kathrein Features Adjustable Electrical Downtilt

Readjustment during operation

Electrical adjustable downtilt

Outstanding technical advantage of electrical compared

to mechanical downtilt

(downtilt angle is constant over the whole azimuth range

/ reliable network planning)

Logistic benefit due to a reduction in the number of

antenna types in the network

Optical aspect : electrical downtilted antennas are

always positioned upright compact appearance

Option of remote controlled adjustable electrical downtilt


4/26Kathrein MS Lautner 06-08

Kathreins sophisticated phase shifters

provide a continuous downtilt angle

adjustment (not in steps)

avoid any metal parts being shifted

across, but uses capacitively

coupling (no risk of intermodulation,

no limitation of lifetime)

ensure that the defined

specifications apply to the whole

downtilt range


The heart of antennas with adjustable electrical downtilt is the phase shifting

element

(1st generation)



= 0

= 0

= 0

= 0

= 0

Double phase shifter

connector

dipoles




= + 140

= + 70

= 0

= -

70

= -140

Double phase shifter

connector

dipoles

Longer path

shorter

path




Important electrical values for dual-polarised Base Station Antennas

Which values are the indicator for the electrical performance of antennas formobile communication beside the values given in the data sheets like VSWR,

F-t-B, IM, gain or decoupling?

Which values are also absolutely important for all Operators regarding the qualityand reliable performance of their network, like as coverage, diversity, signal

strength, avoiding of interference, avoiding of dropout-calls and defined hand-over-

scenarios?

Squint Tracking

CrossPolarRatio

Specially Squint and Tracking are more or less related to each other and should not be seen as

independent performance values. But to show the basic designe criterias, we want to have a

look on both seperatly.



Kathrein Features High CPR

Cross polar ratio (+/- 45 polarization)

Cross polar ratio describes the correlation between two orthogonal

polarizations

measured in the farfield (accurate +/-

45)

Ratio between the co-polar and the cross-polar signal

(identical compared to opposite polarization)

CPR

orthogonal polarizations high cross polar ratio

excellent diversity

performance

Excellent cross-polar ratio (CPR)

values for the complete sector,

performed by a complete new

dipole element (patent pending)



CrossPolarRatio (Competitor)

Not only the main

direction BUT also the

sector borders are

from great interest

regarding CPR!

The CPR-value at + /-

60 from the main

direction should not

be worst ~10dB!


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CPR performance of a competitorantenna

0345

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195180

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45

30

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-30 -20 -10 dB

Polarization: - 45 Frequency: 2170.0 MHz

Co-Pol Cr-Pol (CC 21.0/ 33.3/ 4.5 dB)

0345

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-30 -20 -10 dB

Polarization: + 45 Frequency: 2170.0 MHz

Co-Pol Cr-Pol (CC 7.7/ 31.7/ 26.6 dB)

CrossPolarRatio (Competitor)


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Kathrein Features High CPR

recommended values: main direction >20 dB

sector +/-

60 degree >10 dB

Antenna 800 10304 : Xpol Panel 806-960 65 16.3 dBi 0- 10 T

Antenna 742 215 : Xpol Panel 1710-2170 65 18 dBi 0- 10 T

measured CPR values of Kathrein antennas :

DT -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60

Tilt 0 14,6 18,1 20,8 22,6 23,5 23,6 23,1 22,0 20,4 18,7 16,8 15,0 13,4

Tilt 2 14,4 18,1 21,4 23,7 24,5 24,2 23,3 21,8 20,0 17,9 15,8 13,9 12,1

Tilt 4 13,9 17,8 21,3 24,1 25,3 24,9 23,5 21,6 19,6 17,4 15,2 13,1 11,2

Tilt 6 11,7 15,1 18,2 20,8 22,7 23,0 22,0 20,3 18,4 16,3 14,1 12,1 10,3

Tilt 8 12,4 15,3 17,3 19,1 20,7 22,1 22,8 21,9 19,9 17,5 15,5 13,8 12,8Tilt 10 11,0 13,4 15,2 17,0 18,9 20,7 21,9 21,3 19,4 17,1 15,1 13,6 12,7

DT -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60

Tilt 0 23,4 23,1 21,8 21 21 21,3 22 23 24,7 27,1 28,9 26,1 21,2

Tilt 2 19,8 22,9 23,3 22,6 22,4 22,4 22,5 22,8 23,3 23,7 24 23,7 22,2

Tilt 4 17 21 23,5 23,7 23,5 23 22,5 22,1 21,7 21,3 21 20,8 20,8

Tilt 6 15,4 19,4 22,9 24,3 24,2 23,4 22,5 21,5 20,7 19,9 19,4 19,2 19,3

Tilt 8 14,3 18,2 22 24,4 24,6 23,6 22,2 20,9 19,7 18,8 18,1 17,7 17,7

Tilt 10 11,5 15,1 19,2 24,1 28,4 26,4 22,7 19,6 17,3 15,4 13,8 12,5 11,6


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Minimum tracking

Symmetry between the +45

and the -45

polarized horizontal pattern, measured at

+/-

60

from the direction orthogonal to the reflector screen, at same

frequency

and same downtilt angle

tracking compensation reduces

the difference to 2 dB

Kathrein Features Minimum Tracking

Antenna

742 215

2140 MHz / 8

DT

+ 45

pattern

-

45

pattern


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Kathrein 800 10247 (X-Pol F-Panel 1710 - 2170MHz 15,5dBi 0-12 tilt)

800 10247

10 electrical tilt; 2140MHz; +45 / -45 pol

More or less NO dif ference neither at

main direction nor at sector borders!

0

30

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300


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Kathrein antenna 742 351(X-Pol F-Panel 1710-2170MHz 33 21dBi 0-8 til t)

- dB20

2512345610

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%

Copyright Kathrein Werke KG

0

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Tracking (Competitor)

Difference ~ 6dB

Difference ~ 8dB


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Minimum Squint

Deviation of the main direction of the horizontal pattern compared to the direction

orthogonal to the reflector screen, measured over the frequency range

Definition of main direction :

bisector of the angle

between the -3 dB

points of the pattern

Kathrein value :

+/-

5% of half power

beam width

Kathrein Features Minimum Squint

Antenna

742 215

1710 MHz / 0DT / -452110 MHz / 0DT / -45


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Kathrein antenna 742 215 (X-Pol F-Panel 1710 - 2000MHz 18dBi 0-10T)

- dB2025 12345610

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%

Copy right Kathrein Werk e KG

0

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Squint performance of a competitor

0345

330

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285

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195180

165

150

135

120

105

90

75

60

45

30

15

-30 -20 -10 dB


Co-Pol Cr-Pol (CC 12.7/ 32.0/ 18.1 dB)

10 electrical tilt ; horizontal HPBW ~ 65; main direction ~ 0

0345

330

315

300

285

270

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225

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195180

165

150

135

120

105

90

75

60

45

30

15

-30 -20 -10 dB


Co-Pol Cr-Pol (CC 7.7/ 31.7/ 26.6 dB)

10 electrical tilt ; horizontal HPBW ~ 61; main direction ~ -9


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Summarized performance of an competitor

0345

330

315

300

285

270

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240

225

210

195180

165

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135

120

105

90

75

60

45

30

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-30 -20 -10 dB


Co-Pol Cr-Pol (CC 20.0/ 22.3/ 4.4 dB)0

345

330

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195180

165

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-30 -20 -10 dB

Polarization: - 45 Frequency: 947.0 MHz

Co-Pol Cr-Pol (CC 7.0/ 20.3/ 17.0 dB)

7 dB11 dB

CPR: 4,4dB / 7.0dB Tracking: 4dB (7dB 11dB) / 4dB (12dB 8dB) Squint-deviation at the same frequency: 18

8 dB12 dB


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High isolation

required because both terminations of a

Xpol

antenna

are used for Rx and Tx

Kathrein Features High isolation

-45

+45

Isolation(Decoupling)

Due to patented decoupling elements Kathrein antennas

provide an isolation of > 30 dB between-

the different polarizations

-

the frequency bands

Examples :742 212

(1710-2170 MHz / variable downtilt)

739 638

( 824-960 MHz / variable downtilt)
http://../Support/741784_ISO.PDFhttp://../Support/739638_ISO.PDFhttp://../Support/741784_ISO.PDFhttp://../Support/739638_ISO.PDFhttp://../Support/739638_ISO.PDFhttp://../Support/739638_ISO.PDFhttp://../Support/739638_ISO.PDFhttp://../Support/741784_ISO.PDF


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Kathrein Features High isolation

Xpol antennas (one per sector) can be mounted around a mast under minimum

spacing; isolation for any port combination better 30 dB !

Specific 3-unit clamp

available

Antenna 1 Antenna 2 Isolat ion [dB]872 960 MHz

Isolation [dB]1710 1880 MHz

+45 / 900 MHz 47 NA - 45 / 900 MHz 50 NA

+45 / 1800 MHz >50 >50

+45 / 900 MHz

- 45 / 1800 MHz >50 >50

+45 / 900 MHz 50 NA

- 45 / 900 MHz 47 NA

+45 / 1800 MHz >50 >50

- 45 / 900 MHz

- 45 / 1800 MHz >50 >50

+45 / 900 MHz >50 >50 - 45 / 900 MHz >50 >50

+45 / 1800 MHz NA 44

+45 / 1800 MHz

- 45 / 1800 MHz NA 43

+45 / 900 MHz >50 >50

- 45 / 900 MHz >50 >50

+45 / 1800 MHz NA 44

- 45 / 1800 MHz

- 45 / 1800 MHz NA 43

Dualband antennas

(4 ports)

N/A not applicable
http://../Support/Datenbl%E4%B4%B4er/9361879.pdfhttp://../Support/Datenbl%E4%B4%B4er/9361879.pdfhttp://../Support/Datenbl%E4%B4%B4er/9361879.pdfhttp://../Support/Datenbl%E4%B4%B4er/9361879.pdf


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Low intermodulation products

> -150 dBc for 3rd order products at 2 x 20 W (43 dBm)

Kathrein Features Low intermodulation

research on intermodulation

since more than 15 years

100 % final test during

production for all GSM and

UMTS -

Single-

Dual-

or

Triple-Band-

Base Station

Antennas


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Constant electrical performance under environmental conditions

Kathrein Features Environment

Kathrein antennas :

Sun, rain, snow, ice do notsignificantly effect the

electrical parameters

Not every other

manufacturer develops likeKathrein


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Excellent mechanical performance

Closed construction

:

completely closed radome made of

an extruded fiberglass profile

separated electrical and mechanical

components

reduced sealing procedure by top

and bottom caps

Kathrein Features Mechanical performance

Other

construction

:

aluminum body and fiberglass half radome have very similar temperature

coefficients (no cracks due to temperature changes)


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Reliability

extensive environmental tests

according ETS 300 019-2-4 regardingvibration shock, temperature a.s.o. on

our own premises during the

development process

Kathrein Features Reliability

recorded failure rate in the field below 0,05% of produced units

Long service life

Extensive final tests during production (VSWR,isolation, intermodulation)

Only if the antennas passes the final test to 100% the system will store the serial

number!


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Special test procedure for Train antennas

With

this

unique

test procedure

we

investigate

the

influence

of a heavy

hail

storm

on our

antennas

for

high

speed

train.

Hailstone

2cm / Speed

400km/h (250mph) / Kinetically

energy

23,5 Joule / Exerted

force1060N

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