Attenuators - Radiall - #4

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TECHNICAL INFORMATION I DEFINITION A coaxial attenuator is a linear passive bidirectional transmission line component designed to be inserted between two coaxial lines in order to reduce the input power in amatched systemby a predetermined ratio without otherwise disturbing the behaviour of the equipment. The ratio of input to output power is expressed in logarithmic terms where 3 dB as a power ratio is 2, 6 dB is 10, 20 dB is 100 and 30 dB is 1000 etc...The power absorbed by an attenuator is returned to the environment through heat transfer by convection or conduction cooling. II GENERAL SPECIFICATIONS In general, RADIALL attenuators are designed in accordance with MIL and NFC standards. " TECHNOLOGY RADIALL coaxial attenuators can be classified technically into 3 main types depending upon the resistive element used. D High frequency and low power attenuators use Tantalum Nitride thin film deposits on Alumina substrates. D High frequency and medium power attenuators use Tantalum Nitride thin film deposits on Aluminium Nitride substrates. D High power attenuators use Ruthenium Oxide thick film circuits printed on alumina substrates sticked to a shape of Aluminium Nitride as a cooling sink. RADIALL has decided to remove Beryllium material from its whole range of medium and high power attenuators. Indeed, Beryllium Oxide dust is highly toxic when scribing or machining or laser trimming. RADIALL has replaced this material by Aluminium Nitride which has excellent heat conductive properties and is absolutely safe for the environment. " MECHANICAL CHARACTERISTICS, MATERIALS AND FINISHES All materials and finishes are in accordance with applicable MIL and NF specifications. All connectors used in our attenuators are in accordance with applicableMIL, DIN, NF and CEI specifications. All dimensions in this catalogue are given in inches and (millimeters). The non--specified dimensions are given within ¦ 0.5 mm. " MANUFACTURING AND QUALITY ASSURANCE Thin film and thick film circuits of RADIALL attenuators are produced in--house, in class 10000 clean rooms, using advanced processing technologies. Our microelectronic laboratory uses a tightly controlled and highly repeatable process, necessary to achieve consistant microwave performances. RADIALL maintains a state-of-the-art computer aided designed system, a well equipped precisionmachine factory, amodern component assembly area and an extensive collection of RF test equipments. Specific testing is available upon request. Coaxial Attenuators 4