Artificial Ground

Sometimes when an RF transmitter is connected to an unbalanced antenna fed against earth ground (e.g., vertical near the earth), a capacitor is inserted in series with the ground conductor connecting the antenna and transmitter. For “single” frequency transmitters, the value of this capacitance is varied until this grounding strap or conductor is resonant. If the grounding strap is electrically short, it is essentially inductive in nature.

Hybrid Ground

There are situations where the shield of a cable must be connected to ground at one or more locations. For example, the coaxial connectors at both ends of the cable might contact the chassis that are required for safety reasons to be grounded. However, low-frequency ground loops are introduced with these multiple ground connections. Sometimes, the addition of inductance might be beneficial in reducing the severity of the ground loop.

  1. Deglorifying the Maximum Power Transfer Theorem

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