We describe the development of a low-noise active balun for a dual-polarized planar connected array antenna operating in the 0.71.8GHz 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 54 array.
|Title of host publication||Proceedings of the 2012 International Conference on Electromagnetics in Advanced Applications, ICEAA'12|
|Number of pages||4|
|Publication status||Published - 2012|
|Event||2012 14th International Conference on Electromagnetics in Advanced Applications, ICEAA 2012 - Cape Town, South Africa|
Duration: 2 Sep 2012 → 7 Sep 2012
|Other||2012 14th International Conference on Electromagnetics in Advanced Applications, ICEAA 2012|
|Period||2/09/12 → 7/09/12|