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Fig. 2: Design parameters of the hyperboloid socket contact Fig. 4: VSWR for a mated pair with Hypertac coaxial sockets for both inner and outer contacts. force, mating cycle, fretting corrosion resistance, and power handling - see figure 2. In addition, the choice of wire material The market waits for no-one however, and even before the and plating finish can also be optimised for each application first of these platform products can be launched, customers are such as high temperature or high frequency requirements. The already requesting custom connectors fitted with this type of fretting corrosion characteristic of this socket contact, vital for contact for their own applications. reliable operation on-board Eurofighter, compared with more Of course the availability of the technology is not the only traditional fork and blade contacts is shown in figure 3. reason why more customers are turning towards the Hyper- Of course, the socket contact alone does not make a con- boloid solution and Hypertac has invested substantially in the nector and today this technology has been incorporated within ability to turn around custom solutions quickly. This approach a wide variety of standard and custom connector shells to suit allows the customer to optimise the connector for his applica- all applications. A recent challenge was to determine whether tion providing the best possible performance of his system in this socket configuration would be suitable to pass high Radio the smallest space within a cost effective framework. Frequency signals commonly found in airborne radar systems. characteristic along the transmission path results in energy be- 5707 for medicalSafe power entry RF signals are transmitted along coaxial cables of a defined characteristic impedance and any significant change in this ing reflected back towards the transmitter. Multiple changes can applications result in multiple reflections and a substantial degradation in the overall system performance. The challenges were therefore two- fold: first to design a contact with a tightly-controlled charac- teristic impedance and excellent radio frequency transmission characteristics and second, to design this contact small enough for the airborne radar application and in keeping with coaxial cable diameters. These challenges resulted in the Hyperboloid once again proving its outstanding capabilities demonstrat- ing insertion loss and VSWR characteristics up to 26GHz and beyond - see figure 4. This high frequency capability also allows high speed data to be transmitted at frequencies in excess of 5GBps and a range of Micro Twinax and Quadrax connectors are currently under development. Strong in Design and Safety - Medical fuse holder and mains filter - IP 65 protection to the appliance - V-Lock cord retaining www.schurter.com/emc_news Fig. 3: Fretting corrosion characteristic of hyperboloid contacts. www.electronics-eetimes.com Electronic Engineering Times Europe January 2013 37


EETE JANUARY 2013
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