2.2 Antenna and Antenna Splitters

2N offers several antenna splitter and antenna models providing the best signal quality on all GSM/UMTS engines. All the systems are designed for all UMTS and GSM networks.

Antenna Splitter

The antenna splitter is designed for decreasing the number of antennas, antenna cables, outdoor antennas and roof mounting space. The antenna splitter is a passive unit suitable for GSM/UMTS gateways. The antenna splitter can be external (2N® StarGate) or internal (2N® BlueTower). Each splitter consists of one or more passive units, each of which has four/two inputs and one output.

Number of inputs

Number of outputs

Input-Output insertion loss

Unit high

32

2

<15 dB

2U

32

4

<11 dB

2U

32

8

<8 dB

2U

16

1

<15 dB

1U

16

2

<11 dB

1U

16

4

<8 dB

1U

12

3

<8dB

1U

Table: Standard External Antenna Splitter Configurations

Number of inputs

Number of outputs

Input-Output insertion loss

Unit high

4

1

<

3U

Table: Internal Antenna Splitters for 2N® BlueTower

Parameters

Value

Note

Connector type

Input connector

SMA type, female

Output antenna connector

N type, female

RF parameters

Impedance

50 Ohm

Frequency

850 – 2100 MHz

Insertion loss

< 8, 11, 15 dB

According to configuration

Isolation between two channels

> 20 dB

Output overvoltage protection

Device type

Gas surge arrester

Protected voltage level

90 V

Peak current

10 KA

Insertion loss

0.2 dB

Table: Technical Parameters of Antenna Splitters

Splitter Examples

Figure: Internal Antenna Splitter for 2N® BlueTower

 

Figure: External Antenna Splitter for 2N® StarGate

 

Directional Antenna

The high-gain directional YAGI antenna is suitable for outdoor and indoor use. 

  • Type – CPY 9214
  • Number of elements – 14
  • Frequency – 824 – 896, 1770 – 2100 MHz
  • Gain – 9.5 dB / 13 dB
  • Cable – RG 58, 10m
  • V.S.W.R – < 1.5 : 1
  • Connector – N type, female

 

 

Figure: Directional Antenna

 

Figure: Example of Correct Installation of Directional Antennas

Warning

  • The antenna has to be placed in accordance with the applicable overvoltage protection and grounding safety rules.

Omni-Directional Antenna

The omni-directional antenna is suitable for outdoor use. 

  • Type – KA 2290. 9214
  • Frequency – 870 – 960, 1710 – 2170 MHz
  • Gain – 3 dB
  • Polarization – Vertical
  • Radiation angle in E-plane – 30°
  • Radiation angle in H-plane – omni-directional
  • V.S.W.R – < 1.7
  • Length – 420 mm
  • Weight – 0.6 kg
  • Connector – N female

 

 

 

Discreet Antenna

The small omni-directional antenna is designed for indoor use and provides a good GSM/UMTS signal quality.

  • Type – Car antenna
  • Gain – 2.5 dB
  • Cable – Coax cable 174A (5 m)
  • Connector – SMA (male)

 

 

Figure: Discreete antena

Directional Antenna Connection Cable

2N offers you a special low-attenuation cable in variable lengths. The cable terminating connectors are of the N type.

  • Type – H1000 PE coax cable
  • Impedance – 50Ω
  • Operating frequency – 5 – 2150 MHz
  • Used connectors – N type (female)
  • Cable size – 10.3mm
  • Operating temperature – −40°C to +80°C
  • Total weight – 120 g/m
  • Minimum installation temperature – –5°C
  • Minimum static bend radius – 75mm
  • Attenuation at 860MHz – 14.1dB / 100m
  • Attenuation at 1000MHz – 15.3dB / 100m
  • Attenuation at 1750MHz – 21.3dB / 100m
  • Attenuation at 2050MHz – 23.4dB / 100m

Installation recommendations

  • Preserve polarization,
  • Keep minimum distance from lightning conductor
  • Keep minimum distance between antennas - half of antenna wave length, that is intended for longest wave length (lowest frequency).
  • Consult angle and azimuth used with your provider, respecting location and BTS usage.
  • Make sure that incoming performance is not above value, that may cause errors in transmission or even burn out of HF parts.