A discrete distributed power amplifier for VHF to UHF

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dc.contributor.authorTan, Teik Siew
dc.date.accessioned2014-11-11T01:17:36Z
dc.date.available2014-11-11T01:17:36Z
dc.date.issued2008
dc.descriptionMasteren_US
dc.description.abstractWide bandwidth power amplifiers are key components in Software-Defined Radio technology. However, the conventional broadband power amplifier has poor bandwidth that limited by the transistor’s gain-bandwidth product. To overcome the conventional gain-bandwidth tradeoff, distributed amplifier topology is often used by combining the outputs from several active gain elements in an additive fashion. However, the conventional distributed amplifier has poor power and efficiency due to the drain line reverse wave. To obtain efficiency and power with wideband application, a tapered distributed power amplifier has been developed, where in theoretically it forces all the power to deliver to the output load. A tapered distributed power amplifier using discrete RF MOSFET devices, RD01MUS1 from Mitsubishi was fabricated and achieved 1 Watt output power with 13 dB associated gain with 25 % of power added efficiency (PAE) over 100 MHz to 600 MHz. This relatively wide bandwidth (500 MHz) performance for tapered distributed power amplifier is better than conventional broadband power amplifier with bandwidth of only 180 MHz.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/374
dc.language.isoenen_US
dc.subjectScience physicen_US
dc.subjectPower amplifieren_US
dc.titleA discrete distributed power amplifier for VHF to UHFen_US
dc.typeThesisen_US
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