A Method of Measuring the Effectiveness of Electrostatic Loop Shielding

In the design of radio receivers employing electro-statically shielded loops, difficulty in measuring the effectiveness of the loop shielding in the laboratory is usually encountered. This paper describes a method using a short rod antenna connected to a conventional standard-signal generator which has been found to be convenient to operate and capable of producing consistent results. The effectiveness of shielding is determined as the ratio of the effective height of the loop as a magnetic field collector to its effective height as an electric-field collector.