| Summary: | 碩士 === 國立中正大學 === 電機工程學系 === 86 === In this thesis, RF modules with automatic level control are
designed for the wireless communications. To satisfy various
wireless system requirements,two automatic-level-control led RF
modules are implemented: one is a 1.9 GHz PACS RF front-end RF
module, and the other is a 0.1-2.6 GHz automatic-level-control
RF module used in wireless broadband systems. The 1.9 GHz PACS
RF module that is implemented in hybrid MIC forms on a FR4
substrate. Under slow fading propagation channel, the designed
receivers can reduce the distortion of the received signal down
to 12% with the automatic level control scheme. The transmitting
power is up to 24 dBm. For the 0.1-2.6GHz ALC module, it is
designed with p type PIN variable attenuators, peak-power
detector, and integrators.The implementation procedure of these
two modules starts from the system specifications, and then
proceeds the sub-circuit partition, component selection, and
computer simulation. The integrated tests of the modules are
performed with HP-VEE automatic measurement software, which
links RF signal generator, network analyzer, spectrum analyzer,
vector signal analyzer, and RF channel simulator.
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