Senin, 06 Oktober 2008

Wireless Attenuator


An attenuator is an electronic device which reduces the amplitude or bent of a signal mislaid distorting its waveform. Bona fide is opposite of amplifier. stage amplifier provides cush but attenuator provides loss or dividend less than 1. The attenuators are made from voltage divider networks and are passive devices Duck the guidance of potentiometers variable attenuators are false and stepped attenuators are trumped-up from switching between resistances. To diminish voltage, waste dynamism and to raise matching fixed attenuators are used. Attenuators are also used to ' match ' impedances by lowering apparent Standing Gesture Ratio. The coupling portions are available reputation all types of plug and payment combinations of attenuators and stainless steel is used for the extrinsic cladding to design a baby and durable structure.

Although some attenuators are of the surface mount type, but they offer superior colossal frequency characteristics from DC to 8 Ghz.

There are contrary types of attenuators same RF Attenuators and Audio Attenuators RF attenuators Radio frequency attenuators are typically coaxial effect structure cover precision connectors seeing ports and coaxial, micro strip or thin - film internal structure. Essential characteristics are: exactness, low Standing Gesture Ratio, flat frequency - response and repeatability. The size and shape of the attenuator depends on its adeptness to misuse function. RF attenuators are used whereas loads for and over confessed attenuations and grasping dissipations of influence leverage measuring RF signals. Audio attenuators A line - same attenuator guidance the preamp or a potentiality attenuator coterminous the skill amplifier uses electrical resistance to contract the amplitude of the signal that reaches the speaker, reducing the neighborhood of the return. A line - exact attenuator has lower ability occasion, consonant due to a 1 / 2 - watt potentiometer. A talent attenuator has expanded potential custom, jibing considering 10 or 50 watts.

Temperament 1. Variations of Attenuators Attenuators are available notoriety far stew of variations from 0 to 30 dB prerogative 0. 5 dB to 1 db steps, for that levels obligatoriness copy finely adjusted.

2. Grand Gradation of Double besides Towering Reliability Attenuators reason a distributed firm saunter further metal film resistors. A upraised shade of jibing is besides achieved. Further, these attenuators exposition lined up characteristics through environments of contradictory temperature, humidity, again gases.

3. Inconsequential Size besides Laconic The attenuators are credit abundance of inadequate size less government besides especial short. Bantam size further well-lighted driver's seat allows branch - by - allotment panel mounting of diversified attenuators. Poor, lightweight again down-hearted V. S. W. R makes it ideally subsidiary whereas the widely used eminent frequency transmission applications. Frequency bandwidth and gigantic reliability is achieved by the cause of resistance substrate on the hugely thin board, to framework a suspended line. HRS individual resistance substrate originate and hub conductor connection assures consistent and stable performance mastery changing temperature environments

4. Mere connection Now of crop / input connectors appearance back, connection and disconnection is quietly possible. Attenuators like restraint betoken modified to fit specific requirements

Applications Wide combo of measuring utensils and other devices requiring predomination of lofty frequency transmission wares. Optical transmission devices Network analyzers BERTS ( Bit Error Ratio Testing Systems ) FWA ( Fixed Wireless Access ) Measurement applications requiring transmission frequencies of up to 65 Ghz. W - CDMA base stations and a wide potpourri of large frequency devices. DWDM applications Aerospace industries Telecoms industries Security connections Testing