Miniaturization Of Balanced Low Noise Amplifier For Wimax Application
| dc.contributor.author | Nekeram, Nitesh Ram Sharma | |
| dc.date.accessioned | 2018-06-05T00:49:44Z | |
| dc.date.available | 2018-06-05T00:49:44Z | |
| dc.date.issued | 2010-05 | |
| dc.description.abstract | Demands for broadband wireless communications has been growing fast recently with the advent of new technologies such as WiMAX. With this growing demand, RF transceiver manufacturers are constantly challenged with the requirements to provide compact and wideband RF components. One such important component especially for WiMAX base-station is the LNA. Current balanced LNAs used in WiMAX base-station is huge in size due to the low frequency of operation which is from 2.3GHz to 2.7GHz. The main objective of this research is to reduce the size of the balanced LNA in an attempt to reduce the cost of the WiMAX base-station. Therefore this thesis presents the design and realization of two LNAs suitable for WiMAX base-station applications. The first LNA is the broadband balanced LNA and a dual stage branch line coupler based on a novel technique. The second amplifier is a balanced LNA design using a novel compact branch line coupler. Small signal and harmonic balance simulations based on ADS have been used extensively in the design process. The LNA design is implemented using ATF-54143 from Avago Technologies. Input and output matching networks and proper biasing circuit have been designed based on microstrip techniques to enable the amplifier to operate at high frequency from 2.3GHz to 2.7GHz. Both the circuits are fabricated using Rogers 4003C material. All measurements which include small signal, power, and noise figure and linearity results were obtained over the whole frequency band. The first balanced LNA design which uses a dual stage branch line coupler exhibits small signal gain of 14.10dB at 2.3GHz to 12.50dB at 2.7GHz.Output power of 20.18dB at 1dB compression point and OIP3 of 36.155dB have been obtained. The second balanced LNA design which uses a compact branch line coupler exhibits small signal gain 14.390dB at 2.3GHz to 13.50dB at 2.7GHz. An output power of 21.28dBm at 1-dB compression point and OIP3 of 37.195dBm have been obtained. The design procedures are given in detail and the results are discussed and compared with simulations and previous work done. Conclusion of this research is the realization of two balanced LNA which are suitable for WiMAX base-station application and at the same time reducing the cost of the base-station. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/5659 | |
| dc.language.iso | en | en_US |
| dc.publisher | Universiti Sains Malaysia | en_US |
| dc.subject | The design and realization of two LNAs | en_US |
| dc.subject | suitable for WiMAX base-station applications | en_US |
| dc.title | Miniaturization Of Balanced Low Noise Amplifier For Wimax Application | en_US |
| dc.type | Thesis | en_US |
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