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Electronics Buyers' Guide

Electronics Manufacturing & Production Handbook 2019


 

Quick-locking connector family gets new member
14 August 2002, Interconnection

Last year, Huber+Suhner released its new QMA interface. The concept of the QuickLock interface was very widely accepted in the market and sparked demand for a QMA-based N connector. Huber+Suhner thus developed the QN connector.

The N connector is one of the best-known and most popular interfaces in the RF industry. This interface is used in a wide variety of applications, primarily where high power has to be transmitted with low loss. Rugged, water-tight, good intermodulation characteristics and RF screening effectiveness are other advantages distinguishing the N connector. The new QN interface combines these qualities with the simple QuickLock coupling mechanism.

Simple mating and demating

As known from QMA, the snap mechanism of the QN works very simply. When a mating force of about 50N is applied, the locking mechanism snaps closed in a single step. To demate, one must pull back the decoupling sleeve. This opens the snap ring of the mating mechanism and allows demating with a force of merely 50N. If the decoupling sleeve is not actuated, the QN connector will never become disconnected.

This straightforward connecting and disconnecting procedure reduces the time needed to mate and demate a connection to about one tenth of the time required for a threaded interface. Also, neither an open-end spanner nor a torque spanner is required. This produces a number of benefits, for example: higher packing density, since no space is needed to tighten the nut with a spanner; no purchase, storage, calibration and maintenance of a torque spanner; no possibility of incorrect tightening torque; no scratched front panels.

No loose connections

Practice has shown that screw-on interfaces often produce loose connections leading to failures - some causes of failure of a screw-connected interface may be: insufficient torque applied during tightening; vibration during transport or service; twisting of the (right angle) connectors during wiring or as a result of other stresses on the cable, etc. This is all eliminated with the QN connector, thanks to its reliable snap-on mechanism making a reproducible connection.

Excellent characteristics

A special contact spring element guarantees a steady outer conductor contact, which always extends all the way around the face of the bush contact. With this solution, excellent intermodulation values and RF screening effectiveness are achieved. The QN has an operating frequency up to 11 GHz, and its return loss has been optimised for the range up to 6 GHz. As with the N connector, a seal in the interface guarantees the necessary protection against moisture in outdoor applications.

The superior technical characteristics of the QN connector allow the new interface to be used in a wide variety of applications. Its good intermodulation characteristics and high power handling capacity make it an ideal choice for service in the transmitting path of mobile radio base stations. On the other hand, thanks to the waterproof-ness of the QN interface, it is also ideally suited for time-saving complete jumper and feeder cabling up to the antenna. The QN is also an excellent solution in many other indoor and outdoor applications in the fields of electronics and RF engineering. This applies particularly when high screening effectiveness, high power handling capacity and a rugged connection with quick and easy decoupling is demanded.


Credit(s)
Supplied By: Dartcom SA
Tel: +27 12 345 7530
Fax: +27 12 345 7600/1
Email: graham.gamble@dartcom.co.za
www: www.dartcom.co.za
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Further reading:

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  • Coax-to-PCB connectors
    29 May 2019, TRX Electronics, Interconnection
    Amphenol SV Microwave’s high-speed RF/coaxial solderless edge launch connectors are ideal for high-frequency printed circuit board applications where precision is key. These rugged and durable interconnects ...
  • Wire-/board-to-board connectors
    29 May 2019, TRX Electronics, Interconnection
    Minitek is Amphenol ICC's brand for board-to-board and wire/cable-to-board connectors in 2,00 mm pitch. It is a fully modular system enabling all types of connections between printed circuit boards, wires ...
  • Choosing the right connector for harsh environments
    30 April 2019, TRX Electronics, This Week's Editor's Pick, Interconnection
    While connectors are sometimes left to last in a system design, they are essential components, and you need to get their selection right.
  • Connectors 101 for lighting designers
    30 April 2019, Avnet South Africa, Interconnection
    Selecting the best connector for a lighting application is a matter of matching application requirements to available connectors, with proper consideration given to performance and costs.

 
 
         
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