Low Noise Performance Perspectives Of Wideband Aperture Phased Arrays
- 38 Downloads
A general analysis of phased array noise properties and measurements, applied to one square meter tiles of the Thousand Element Array (THEA), has resulted in a procedure to define the noise budget for a THEA-tile (Woestenburg and Dijkstra, 2003). The THEA system temperature includes LNA and receiver noise, antenna connecting loss, noise coupling between antenna elements and other possible contributions. This paper discusses the various noise contributions to the THEA system temperature and identifies the areas where improvement can be realized. We will present better understanding of the individual noise contributions using measurements and analysis of single antenna/receiver elements. An improved design for a 1-m2 Low Noise Tile (LNT) will be discussed and optimized low noise performance for the LNT is presented. We will also give future perspectives of the noise performance for such tiles, in relation to the requirements for SKA in the 1 GHz frequency range.
Keywordslow noise phased array radio astronomy
Unable to display preview. Download preview PDF.
- Kuenen, J. C.: 2004, ‘Impact of Antenna Matching on THEA Noise’, ASTRON Report SKA-00939.Google Scholar
- Maaskant, R., Woestenburg, E. E. M. and Arts, M. J.: 2004, ‘A Generalized Method of Modeling the Sensitivity of Array Antennas at System Level’, Proceedings of the 34th European Microwave Conference, Amsterdam, The Netherlands, pp. 1541–1544.Google Scholar
- Vaate bij de, J. G. and Kant, G. W.: 2002, ‘The phased array approach to SKA. Results of a demonstrator project’, Proceedings of the 32nd European Microwave Conference, Milan, Italy, pp. 993–996.Google Scholar
- Weem, J.P. and Popović, Z.: 2001, ‘A method for determining noise coupling in a phased array’, IEEE MTT-S Digest, pp. 271–274.Google Scholar
- Woestenburg, E. E. M. and Dijkstra, K. F.: 2003, ‘Noise Characterization of a Phased Array Tile’, Proceedings of the 33rd European Microwave Conference, Muenich, Germany, pp. 363–366.Google Scholar