The term $$z_0 = ext{sqrt}rac{l}{c}$$ represents the characteristic impedance of a transmission line, where 'l' is the inductance per unit length and 'c' is the capacitance per unit length. This concept is crucial in understanding how electrical signals propagate along coaxial transmission lines. Characteristic impedance plays a vital role in minimizing reflections and ensuring efficient power transfer along the line, linking closely to signal integrity and transmission efficiency.
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