Influence of the antenna impedance variation and input matching network Q on LNA key figures

Author

Ruaro, Andrea ; Kvist, Soren H. ; Gulstorff, S. ; Thaysen, Jesper ; Jakobsen, Kaj B.

Author_Institution

Dept. of Electr. Eng., Tech. Univ. of Denmark, Lyngby, Denmark

fYear

2012

fDate

12-13 Nov. 2012

Firstpage

1

Lastpage

3

Abstract

In this paper we present an analysis of the behaviour of a 2.4 GHz Low Noise Amplifier (LNA) for Wireless Body Area Network (WBAN) applications facing antennadetuning issue. An amplifier with ultra-low power, low voltage, and with reduced component count is prototyped to validate simulation results, then the behaviour is analyzed through simulations based on data measured on real users. The analysis shows that the designed LNA is stable to the antenna impedance variation expectable in most cases, while highlights the possible risks associated to a high-Q input matching network when used in a context prone to antenna detuning risk.

Keywords

antennas; body area networks; low noise amplifiers; LNA key figures; WBAN; antenna impedance variation; frequency 2.4 GHz; high-Q input matching network; low noise amplifier; wireless body area network; Antenna measurements; Antennas; Gain; Impedance; Impedance matching; Noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Conference (LAPC), 2012 Loughborough

Conference_Location

Loughborough

Print_ISBN

978-1-4673-2218-8

Electronic_ISBN

978-1-4673-2219-5

Type

conf

DOI

10.1109/LAPC.2012.6403036

Filename

6403036