资料介绍
RF资料 Sheet
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Balun Design
In the design of mixers, push-pull amplifiers, baluns are used to link a symmetrical (balanced)
circuit to a asymmetrical (unbalanced) circuit.
Baluns are designed to have a precise 180-degree phase shift, with minimum loss and equal
balanced impedances. In power amplifiers loss of symmetry will degrade efficiency and the
symmetrical port must be well isolated from ground to eliminate parasitic oscillations.
The basic construction/design of a balun consists of two 90-degree phasing lines that provide
the required 180-degree split, and this involves the use of λ/4 and λ/2.
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