A Comparison of Two Power Combining Elements for LWA Active-Baluns - 180° Hybrid versus Wideband Transformer
نویسندگان
چکیده
We present a detailed study of the performance and cost issues related to the selection of either a 180° hybrid or a simple transformer for use as the primary power combining element for future LWA active-baluns. Noise figure, 1 dB compression point, IP2, IP3, Gain and VSWR measurements have been performed on two balun prototypes in order to do a side-by-side performance comparison. The prototypes had identical layouts with the exception that one used a 180° hybrid and the other used a transformer as the power combining element. Based on this analysis and our experience with the design of active-baluns, we recommend the use of a 180° hybrid for the LWA active balun power combining element.
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