Design Of Wideband Rf Front End Wireless Transceiver

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dc.contributor.authorAhmad Zubir, Ihsan
dc.date.accessioned2018-07-20T08:11:59Z
dc.date.available2018-07-20T08:11:59Z
dc.date.issued2012-02
dc.description.abstractIn this thesis, a wireless transceiver operating at 5.8 GHz for image transmission application is designed and fabricated. It provides wide bandwidth of 200 MHz with noise figure of 2.5 dB. The transceiver‟s prototype was built using off-the-shelf components from Mini-Circuit and Hittite except 132 MHz and 5.8 GHz bandpass filter. It consists of a superheterodyne receiver and a superheterodyne transmitter analog front-end together with local oscillator and IF amplifier. Superheterodyne architecture was implemented in this transceiver design because it is not complicated design and suitable for high resolution ADCs operating over 320MHz. There are two types of bandpass filter was designed in this project which are lumped element for low frequency and distributed for high frequency application. The specification for the lumped element bandpass filter is 132 MHz with 200 MHz bandwidth. Another bandpass filter is a novel structure of 5.8 GHz bandpass filter has been developed using a combination of split-ring resonator (SRR) and end-coupled transmission lines was introduced in this research. The compact structure from a close couple of two end-coupled transmission lines embedded by two quarter wavelength of split-ring resonators were able to improve the high insertion loss in the passband of the device. The end-coupled transmission line was found to be a parameter that can improves the performance of return loss. The advantage of this new structure approach is a size reduction with a high rejection as well as steep transition bands for both lower and upper cutoff frequencies. The dimensions of the split-ring can be tuned to obtain a narrow or wide band. This design produces a bandwidth of 203 MHz at 5.86 GHz with the best insertion loss in passband from the measurement was 2.64 dB. The overall design and simulation of the transceiver are performed using Advanced Designed System (ADS). Whereas, Computer Simulation Technology (CST) are used to design the 5.8 GHz bandpass filter. Verification of the design is accomplished through transmitter and receiver hardware testing. The transmitter upconverted IF input at 132 MHz to an RF of 5.8 GHz, while receiver downconverted an RF input at 5.8 GHz to an IF of 132 MHz back. The transmitter has IF input signal level of -20 dBm at 132 MHz and -39.83 dBm RF output power at 5.8 GHz. While receiver has RF input signal level of -50 dBm at 5.8 GHz and -35.33 dBm output power at 132 MHz. For the transceiver testing, it has -20 dBm IF input power at 132 MHz and -24.83 dBm output power at 132 MHz.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/5987
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectA wireless transceiver for image transmissionen_US
dc.subjectapplication is designed and fabricateden_US
dc.titleDesign Of Wideband Rf Front End Wireless Transceiveren_US
dc.typeThesisen_US
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Pusat Pengajian Kejuruteraaan Elektrik dan Elektronik - Tesis