Comparison of wideband LNA designs for SDR applications

Author

Osman, Anwar Faizd ; Mohd Noh, Norlaili ; Mustaffa, Mohd Tafir ; Abd Manaf, Asrulnizam

Author_Institution

Sch. of Electr. Eng., Univ. Sains Malaysia, Nibong Tebal, Malaysia

fYear

2014

fDate

19-21 Aug. 2014

Firstpage

515

Lastpage

520

Abstract

This paper describes the design of two wideband LNA topologies for TIA-603 software defined radio (SDR) applications. The two LNA designs are the negative feedback and the balanced amplifier. The negative feedback employs the resistive drain to gate feedback whereas the balanced amplifier incorporates a compact 3dB branch line coupler. Both designs utilized the GaAs transistor, operated by a 5V DC supply and were implemented in a RO4003 PCB. Comparing the performance of the two designs, the balanced amplifier achieved the best RF performance with a stable gain of at least 17.5dB, noise figure lower than 1.03dB, input and output return loss of greater than 11dB and IIP3 of at least 14dBm, which makes it comparable to previously published works.

Keywords

III-V semiconductors; feedback amplifiers; gallium arsenide; low noise amplifiers; network synthesis; network topology; software radio; transistor circuits; wideband amplifiers; DC supply; GaAs; IIP3; RO4003 PCB; SDR applications; TIA-603; balanced amplifier; branch line coupler; negative feedback; noise figure; return loss; software defined radio applications; voltage 5 V; wideband LNA designs; wideband LNA topologies; Couplers; Equations; Mathematical model; Negative feedback; Resistors; Transistors; Wideband; Software Defined radio; TIA-603; balanced amplifier LNA; negative feedback LNA;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Design (ICED), 2014 2nd International Conference on

Conference_Location

Penang

Type

conf

DOI

10.1109/ICED.2014.7015861

Filename

7015861