Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-11T03:25:07.302Z Has data issue: false hasContentIssue false
  • English
  • Français

Technique for reduction of noise resistance in a balanced low-noise amplifier for beam-steering applications

Published online by Cambridge University Press:  11 July 2013

David M.P. Smith  and
Bert E.M. Woestenburg
David M.P. Smith*
Affiliation:
Department of Electrical and Electronic Engineering, Stellenbosch University, Stellenbosch 7600, South Africa. Phone: +31 521 595 152
Bert E.M. Woestenburg
Affiliation:
ASTRON, Postbus 2, 7990 AA, Dwingeloo, The Netherlands
*
Corresponding author: D.M.P. Smith Email: smith@astron.nl
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper, following up on the previous work, investigates the effect of the input coupler's load termination of a balanced amplifier in a beam-steering system. The noise generated in this load termination deteriorates the amplifier noise resistance, which increases the noise temperature due to a varying active reflection coefficient at the antenna ports as a function of scan angle. In reducing this effect, the balanced configuration is made more favorable for radio astronomy applications. By lowering the value of the impedance termination on the fourth port of the quadrature coupler an improvement in noise temperature sensitivity is achieved at the cost of reduced power matching.

Keywords

Low-noise and communication receiversModellingSimulation and characterizations of devices and circuits
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 5 , Issue 5 , October 2013 , pp. 561 - 565
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Dewdney, P.E.; Hall, P.J.; Schilizzi, R.T.; Lazio, T.J.L.W.: The square kilometre array, in Proc. IEEE, 97 (8) (2009), 1482–1496.Google Scholar
[2]Carilli, C.L.; Rawlings, S.: Science with the square kilometre array. New Astron. Rev., 48 (11–12) (2004), 979–1606.Google Scholar
[3]Schilizzi, R.T. et al. : Preliminary Specifications for the Square Kilometre Array, International SKA Project Office, Memo 100, 10 December 2007.Google Scholar
[4]Greenwood, C.: Status of Pathfinder Telescopes and Design Studies, International SKA Project Office, Techical Report, 10 December 2007.Google Scholar
[5]Kant, G.W.; Patel, P.D.; Wijnholds, S.J.; Ruiter, M.; van der Wal, E.: EMBRACE: a multi-beam 20,000-element radio astronomical phased array antenna demonstrator, IEEE Trans. Antennas Propag., 59 (6) (2011), 1990–2003.Google Scholar
[6]van Cappellen, W.A.; Bakker, L.: APERTIF: Phased array feeds for the westerbork synthesis radio telescope. in IEEE Int. Symp. Phased Array Systems and Technology, Boston, MA, USA, 12–15 October 2010, 640–647.Google Scholar
[7]bij de Vaate, J.G.; Bakker, L.; Woestenburg, E.E.M.; Witvers, R.H.; Kant, G.W.; van Cappellen, W.: Low cost low noise phased-array feeding systems for SKA pathfinders. in Int. Symp. Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting, Toronto, ON, Canada, 15–18 February 2009, 1–4.Google Scholar
[8]Warnick, K.F.; Woestenburg, E.E.M.; Belostotski, L.; Russer, P.: Minimizing the noise penalty due to mutual coupling for a receiving array. IEEE Trans. Antennas Propag., 57 (6) (2009), 1634–1644.Google Scholar
[9]Woestenburg, E.E.M.; Bakker, L.; Ivashina, M.V.: Experimental Results for the Sensitivity of a low noise aperture array tile for the SKA, IEEE Trans. Antennas Propag., 60 (2) (2012), 915–921.Google Scholar
[10]Woestenburg, E.E.M.: Noise Properties of balanced amplifier configurations. Int J.Microw. Wirel. Technol., 3 (1) (2011), 67–75.Google Scholar
[11]Kerr, A.R.: On the noise Properties of balanced amplifiers. IEEE Microw. Guid. Wave Lett, 8 (11) (1998), 390–392.Google Scholar
[12]Ommic, CGY2105XHV: Dual ultra low noise high IP3 amplifier.Google Scholar