Belostotski, LeonidHaslett, JamesKulatunga, Thisara2018-04-262018-04-262018-04-25http://hdl.handle.net/1880/106554The Dominion Radio Astrophysical Observatory is interested in investigating the possibility of replacing 408 MHz narrow-band feed antennas with wide-band antennas. Such change would require low-noise amplifiers (LNAs), which would operate over a wider frequency band. This thesis explores the feasibility of using GaAs p-HEMT transistors to implement a wide-band low-noise amplifier for the 400 MHz to 800 MHz frequencies for use in a wide-band antenna array. In order to demonstrate the feasibility, a three-stage cascaded low-noise amplifier was developed and experimentally verified. The GaAs p-HEMT LNA achieves a sub 0.36dB noise figure in the 390MHz to 810MHz frequency region and a beam-equivalent receiver noise temperature of 17.8K to 28.3K within the 390 MHz-to-810MHz frequency region. The LNA demonstrates S21 > 41.1 dB within the 400 MHz-to-800MHz frequency region while consuming 406mW of power. This LNA has P1dB> -32.9 dBm and IIP3 > -22.5 dBm within the frequency region.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.p-HEMTlow-noise amplifierGaAsradio astronomyEngineering--Electronics and Electricalmaster thesis10.11575/PRISM/31840