Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2014 - zeszyt 6

Digital radio modem operating in a 433 MHz band with an innovative front-end circuit

10.15199/ELE-2014-046

nr katalogowy: 85123
10.15199/ELE-2014-046

Many of the modern RF communication circuits are based on single chip radio transceivers. Their application is usually relatively simple and straightforward and only requires up to a dozen external passive elements. The main advantages of such a design are the small PC B size required, low power consumption, hardware support for many communication-related functions, flexible software control, high reliability and low cost of electronic components. The last property is often the most important one in consumer electronics, and many integrated transceivers find application in this market segment. In industrial applications, however, such solutions often give an inadequate performance. The most significant problems commonly found in single chip transceivers are low dynamic range, low selectivity, low immunity to blocking and unsatisfactory intermodulation parameters, especially at high signal levels. Moreover such constructions often suffer from significant emissions of local oscillator signals that cause problems during certification and functionally may disrupt neighbouring RF receivers or RF sensitive devices. The reason for such behaviour is commonly the homodyne or low intermediate frequency (IF) architecture used in integrated radio transceivers. Many of the radio reception issues remain hidden until the density of the electronic circuitry increases, radio network nodes start to operate close to each other or other high-level signal sources are present, which is a common event in industrial applications. These problems are widely recognised, and can be traced to standard specifications. For example, the ET SI EN 300-220-1 standard that describes requirements for short-range devices working in the sub-GHz frequency range establishes three categories of receivers, based on the risk assessment of the radio receiver performance. The most reliable category of devices has additional requirements concerning adjacent channel selectiv[...]

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e-Publikacja (format pdf) - nr 85123 "Digital radio modem opera..." licencja: Osobista Produkt cyfrowy	10.00 zł

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ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA - e-zeszyt (pdf) 2014-6 licencja: Osobista Produkt cyfrowy	35.00 zł

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2014-6

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