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Broadband technology has been rapidly developed and become one of the global commodities needed by most of population in the last few years. Broadband wireless technology having a bright future to be developed. WiMAX is one of broadband wireless technology that in the past few years becoming popular...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/10918 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Broadband technology has been rapidly developed and become one of the global commodities needed by most of population in the last few years. Broadband wireless technology having a bright future to be developed. WiMAX is one of broadband wireless technology that in the past few years becoming popular because its ability to provide communications solution with high transfer rate for area outside broadband loop. WiMAX is based on the IEEE 802.16 standard. It has two popular version, fixed WiMAX based on the IEEE 802.16-2004 or 802.16.d and mobile WiMAX based on the IEEE 802.16e.<p> <br />
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In this final project, a front-end receiver for WiMAX subscriber station is presented. Front-end receiver to be designed is using direct conversion architecture and consists of a low noise amplifier (LNA) and a mixer. LNA topology is using doublebalanced while mixer topology is using switching mixer double-balanced. This topology is chosen due to linearity reasons. Front-end receiver must be designed so it can be used in wide-band frequency. Since the frequency used in Indonesia WiMAX systems will be on 2.3 GHz and 3.3 GHz, the front-end receiver should operate from DC to 3.4 GHz. Wide-band matching is achieved in the frequency bands of interest by applying a dualloop wide-band active feedback.<p> <br />
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The front-end receiver was simulated using RF bipolar transistor available in AMS 0.35 μm technology kit with CATENA SIMetrix 5.40d software. Front-end circuit is designed with a balanced combined low noise amplifier dan a switching mixer. The circuit achieves 20.13 dB conversion gain and introduces 3.055 dB of noise figure on frequency 3.689 GHz. The circuit also introduces -15.708 dBm of IIP3 on 2.30 GHz-2.35 GHz and -14.678 dBm of IIP3 on 3.30 GHz-3.35 GHz. All simulated parameters fullfill requirements for LNA and mixer determined previously. |
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