Design Low Noise Amplifier For GPS Application

Marina , Mohamad (2011) Design Low Noise Amplifier For GPS Application. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Preview	PDF (24 pages) Design_Low_Noise_Amplifier_For_GPS_Application_-_24_pages.pdf - Submitted Version Download (4MB)
	PDF (Full Text) Design_Low_Noise_Amplifier_For_GPS_Application_-_Full_Text.pdf - Submitted Version Restricted to Registered users only Download (3MB)

Abstract

The low noise amplifier (LNA) is a special type of electronic amplifier used in communication systems which amplifies very weak signals captured by an antenna. This is frequently used in microwave or high radio frequency (RF) systems such as mobile hand phone, global positioning system (GPS) or even the large communicating antenna. In this project, the LNA was design for GPS application which is the frequency operating at 1.575GHz. To be able to detect weak signals, the receiving system must maintain a noise level that is lower than the received signal. When using a low noise amplifier, noise is reduced by the gain by the amplifier while the noise of the amplifier is injected directly into the received signal. In this project, the design of microwave transistor amplifiers using the small signal S-parameters was studied to develop the LNA. S-parameters are a valuable aid both for collecting data for a transistor and then using the data to predict performance and design an amplifier circuit. The Smith chart is an easy and practical tool used to designing matching circuits meanwhile the micro-strip lines can perform the impedance conjugate matching. The Microwave Office Software (AWR) was used to simulate the design. In this project, several types of matching were design to match the load. The lumped element, quarter wave and single stub matching are use in this project. From the results obtained, this project could be improved by learning the technique of micro-strip lines fabrication.

Actions (login required)

View Item