Questions & Answers on Baluns

What is the difference between a Balun and a RF Transformer?

Jul 12, 2017

Though certain types of baluns and RF transformers may be similarly constructed, and the circuit diagram symbols are easily confused, the designation of balun and RF transformer imply different operational characteristics and purposes, with some overlapping characteristics. Baluns convert between balanced and unbalanced lines, and RF transformers perform impedance matching, voltage or current step...read more

What is Phase Balance and Amplitude Balance in a Balun?

Baluns

Peter McNeil

Aug 21, 2017

Phase balance and amplitude balance are a measure of how accurately the signal power and phase (180° out-of-phase) are matched between the two balanced (differential) ports of a balun. Phase balance is given as the measurement in degrees of the difference in phase between the inverted output from the non-inverted output. Baluns with a phase balance closer to 0° are higher performing baluns. Amplit...read more

What is Common Mode Suppression in a Balun?

Baluns

Peter McNeil

May 8, 2018

Common mode suppression baluns, choke baluns, or autotransformer baluns provide both common mode signal attenuation and balancing, unlike transformer baluns, which are sometimes referred to as ununs. Common mode suppression baluns commonly use multiple conductors with tapped winding around a magnetic core material, often a toroid or bars. Typically, this core material is made of a magnetic lossy c...read more

What is the Impedance Ratio/Turns Ratio in a Balun?

Baluns

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