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Submit Another Query. Full Name. Your Company. Your Email. Please wait Please provide valid credentials. Create an account Create an account on everything RF to get a range of benefits. Enter Name. Enter Company. Enter Email. Enter Password. Create Account. Already have an account? Sign In. Login Login to everything RF to download datasheets, white papers and more content. Receiver sensitivity is affected greatly by a number of factors, including location and placement within the wireless device.
Register for Webinar. Join your peers for the unveiling of the latest insights at Gartner conferences. Expert insights and strategies to address your priorities and solve your most pressing challenges. Information Technology Gartner Glossary. Receiver Sensitivity. Related Content Webinar. Sorry, No data match for your criteria. In any receiver, it is essential that the noise performance and hence the sensitivity is considered at the outset of the RF circuit design.
The basic RF design concepts will govern the best sensitivity performance that can be achieved. Decisions made at the beginning of the design can limit the overall performance that can be achieved. In terms of the noise performance of any receiver, it is the first stages or front end that are most crucial. At the front end the signal levels are at their lowest and even very small amounts of noise can be comparable with the incoming signal. At later stages in the radio receiver the signal will have been amplified and will be much larger and therefore the noise will have a smaller effect.
Accordingly it is important that the noise performance of the front end is optimised for its noise performance. It is for this reason that the noise performance of the first radio frequency amplifier within the radio receiver is of great importance.
It is the performance of this circuit that is crucial in determining the performance of the whole radio receiver. To achieve the optimum performance for the first stage of the radio receiver there are a number of steps that can be taken during the RF circuit design. These include:. Determination of required gain While it may appear that the maximum level of gain may be required from this stage to minimise the levels of amplification required later and in this way ensure that the noise performance is optimised, this is not always the case.
There are two major reasons for this. The first is that the noise performance of the circuit may be impaired by requiring too high a level of gain. Secondly it may lead to overload in later stages of the radio receiver and this may degrade the overall performance. Thus the level of gain required must be determined from the fact that it is necessary to optimise the noise performance of this stage, and secondly to ensure that later stages of the receiver are not overloaded.
Choice of active device The type of active device and the other electronic components to be used within the RF circuit design are also important.
There are generally two decisions, whether the circuit design should be based around the use of a bipolar junction transistor, or whether to use a field effect transistor. Having made this basic RF design decision, it is obviously necessary to decide upon the actual device, which should be specified as being a low noise device. The noise performance of bipolar transistors and FETs is normally specified in the data sheets, and special high performance low noise devices are available for RF circuit design applications.
Optimise impedance matching In order to obtain the best noise performance for the whole radio receiver it is necessary to optimise the impedance matching. It may be thought that it is necessary to obtain a perfect impedance match.
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