| 摘要 |
A broadband active balun using reactive feedback and a balanced mixer using the balun are provided. The broadband active balun comprises a common gate FET having a source connected to an input terminal, a gate connected to the ground, and a drain connected to a first output terminal; a reactive impedance element having one end connected to the drain of the common gate FET and the other end connected to one of the gate and the source of the common gate FET, and a common source FET having a gate connected to the input terminal, a source connected to the ground and a drain connected to a second output terminal. Accordingly, the active balun has a small physical size and a wide frequency band.
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