International Journal of Electrical and Computer Engineering (IJECE) Vol. 5, No. 3, June 2015, pp. 611~620 ISSN: 2088-8708  611 Journal homepage: http://iaesjournal.com/online/index.php/IJECE Design and Analysis High Gain PHEMT LNA for Wireless Application at 5.8 GHz Kamil Pongot 1,2 , Abdul Rani Othman 2 , Zahriladha Zakaria 2 , Mohamad Kadim Suaidi 2 , Abdul Hamid Hamidon 2 , J.S. Hamidon 2 , Azman Ahmad 1,2 1 Bahagian Sumber Manusia, Majlis Amanah Rakyat (MARA) Tingkat 17 & 18 Ibu Pejabat MARA, Jalan Raja Laut, 50609 Kuala Lumpur, Malaysia 2 Centre of Telecommunication and Innovation (CETRI), Faculty of Electronics and Computer Engineering Universiti Teknikal Malaysia Melaka (UTeM), Hang Tuah Jaya 76100, Durian Tunggal, Melaka, Malaysia Article Info ABSTRACT Article history: Received Jan 20, 2015 Revised Apr 25, 2015 Accepted May 10, 2015 This research presents a design of a higher gain (66.38dB) for PHEMT LNA using an inductive drain feedback technique for wireless application at 5.8GHz. The amplifier it is implemented using PHEMT FHX76LP transistor devices. The designed circuit is simulated with Ansoft Designer SV. The LNA was designed using T-network as a matching technique was used at the input and output terminal, inductive generation to the source and an inductive drain feedback. The low noise amplifier (LNA) using lumped-component provides a noise figure 0.64 dB and a gain (S 21 ) of 68.94 dB. The output reflection (S 22 ), input reflection (S 11 ) and return loss (S 12 ) are -17.37 dB, - 15.77 dB and -88.39 dB respectively. The measurement shows the stability was at 4.54 and 3-dB bandwidth of 1.72 GHz. While, the low noise amplifier (LNA) using Murata manufactured component provides a noise figure 0.60 dB and a gain (S 21 ) of 66.38 dB. The output reflection (S 22 ), input reflection (S 11 ) and return loss (S 12 ) are -13.88 dB, -12.41 dB and -89.90 dB respectively. The measurement shows the stability was at 6.81 and 3-dB bandwidth of 1.70 GHz. The input sensitivity more than -80 dBm exceeded the standards required by IEEE 802.16. Keyword: Cascaded and Cascoded LNA IEEE 802.16 Inductive drain feedback PHEMT LNA Copyright © 2015 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Kamil Pongot Bahagian Sumber Manusia, Majlis Amanah Rakyat (MARA) Tingkat 17 & 18 Ibu Pejabat MARA, Jalan Raja Laut, 50609 Kuala Lumpur, Malaysia. Email: kamilpongot@yahoo.com.sg 1. INTRODUCTION At this point, most of the developing and advanced country used 3G technologies due to the speedy delivery of information to users at a higher bit rate. However, the bit rate of 3G technology reserve at this point is still not enough due to the high demand from consumers, especially in wireless broadband. To overcome this problem, the use of WiMAX technology was introduced to consumers to enable effective connectivity at high bit rate to a new generation of consumer devices for adaptation latest applications that are available in the market [1]. Groups of telecommunication protocol using WiMAX technology are new trademark and standards in the provision of mobile and fixed internet access. Residential construction and opening of a planned township enterprise in free zones require high data transfer rate (70 Mbps) and reach (50 km) to meet the needs of high bandwidth voice and data to support the growth of the industry [2]. WiMAX is a replacement technology for cellular phone technologies such as UMTS and GSM and can be used to increase capacity of the customer [3]. Therefore, the RF front-end receiver should be designed according to the latest specifications to support new trademark as set by the telecommunications protocols and allows it to operate in a multiple of applications on a single device.