Title :
Development of a low-noise active balun for a dual-polarized planar connected array antenna for ASKAP
Author :
Shaw, R.D. ; Hay, S.G. ; Ranga, Y.
Author_Institution :
ICT Centre, CSIRO, Epping, NSW, Australia
Abstract :
We describe the development of a low-noise active balun for a dual-polarized planar connected array antenna operating in the 0.7-1.8GHz frequency range. The device consists of two single-ended low-noise amplifiers (LNAs) operating at ambient temperature with a passive output-side balun. Issues of device characterization, matching and stability are discussed and techniques for measuring the signal and noise parameters are described. The viability of the approach is confirmed by preliminary measurements of noise temperatures less than 60K on a 5 × 4 array.
Keywords :
baluns; electromagnetic wave polarisation; low noise amplifiers; planar antenna arrays; ASKAP; LNA; device characterization; device matching; device stability; dual-polarized planar connected array antenna; frequency 0.7 GHz to 1.8 GHz; low-noise active balun; noise parameter measurement; noise temperatures; passive output-side balun; signal parameter measurement; single-ended low noise amplifiers; Arrays; Impedance matching; Load modeling; Noise; Noise measurement; Temperature measurement; Transmission line measurements;
Conference_Titel :
Electromagnetics in Advanced Applications (ICEAA), 2012 International Conference on
Conference_Location :
Cape Town
Print_ISBN :
978-1-4673-0333-0
DOI :
10.1109/ICEAA.2012.6328666
