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Compact Low PIM RF Connectors for Mobile Radio Communications

The new Telegärtner 2.2-5 series has turned the successful 4.3-10 concept into a smaller design. Whilst 4.3-10 requires the same space as N connector, 2.2-5 only requires the space of TNC. Despite the clear reduction in size & weight, 2.2-5 possesses comparable electrical & thermo-climatic properties to 4.3-10 and can be used with cables up to ½” corrugated cable both in- & outdoors.

Telegärtner 2.2-5 Series – Compact Low PIM RF Connectors for Mobile Radio Communications Downsized Low PIM Performance

Connectors play a decisive role in the good performance in transmission of RF signals between base stations or remote radio heads and antennas. In the future, mobile networks will require RF signal transmission to be implemented with tighter and tighter space constraints, less losses and the lowest interferences with regard to passive intermodulation. These market requirements led in the last few years to the introduction of the 4.3-10, of which Telegärtner was one of the co-developers.

The 2.2-5 series has taken the successful concept of the 4.3-10 and turned it into a smaller design. Whilst the 4.3-10 typically requires the same space as a classic N connector, the 2.2-5 only has the standard space requirements of the TNC series. Despite the clear reduction in size and weight, the 2.2-5 series possesses comparable electrical and thermo-climatic properties to the 4.3-10 series and can be used with cables up to ½” corrugated cable both indoors and outdoors.

The draft of the standard proposal for the 2.2-5 series was submitted to the IEC (International Electrotechnical Commission) and has already been approved as a Committee Draft.

1 Jack - 3 Plug Designs

Advantages of 2.2-5 Connector Series

  • Space and weight savings due to compact design
  • Optimized for 1/4”, 3/8”, 1/2“ corrugated cables and UT85, UT141, UT250 semiflex cables
  • Excellent PIM values independent from torque and coupling mechanism
  • Contact areas protected from damage even when not mated
  • Screw, Hand Screw and Push-Pull options with same jack
  • Approved as a Committee Draft at IEC

Compact Design

The 2.2-5 series enables a robust and PIM stable design in the smallest space. The space requirements for a typical 4 hole flange jack are only 17.4 x 17.4 mm. This is the same as the usual mounting surface for the TNC series. Therefore the 2.2-5 requires around 53 % less space than the 4.3-10 series and 70 % less space than the 7-16 series. Hand in hand with the size and material reduction, there is also a cost and weight reduction, meaning this series is ideal for small cell applications. Despite the small size, relatively thick and therefore low loss cables up to ½” can be used.

Applications for 2.2.-5 Connectors

The 2.2-5 interface has been designed to address applications requiring PIM stability but in a small size.

Small Cells
In small cell applications, the 2.2-5 interface is particularly suitable for challenging space restrictions under high electrical performance requirements.

DAS - Distributed Antenna System
In multi operator/multiband DAS, it can be used where RF signals have to be combined, terminated or distributed to the antenna.

Low Power Remote Radio Units
In low power base stations, the 2.2-5 can be used for interconnections in the remote radio unit as well as the interface on the antenna and on the jumpers.

Solutions and Products

Typical products / product lines where the 2.2-5 interface is designed to are:

Antennas
- MIMO antennas
- Internal antenna interconnection
- Outdoor antennas
- Indoor antennas

Jumper Cables

Combining and Distribution Components
- Multiband and Sameband Combiners
- Splitters
- Tappers
- Couplers

Author
Telegartner UK Ltd

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