Skip to main content
Fig. 5 | EURASIP Journal on Wireless Communications and Networking

Fig. 5

From: A new portable ELF Schumann resonance receiver: design and detailed analysis of the antenna and the analog front-end

Fig. 5

a Metallic box for electromagnetic protection and battery-powered. b Experimental preamplifier voltage input noise, 20 mV/division. For electromagnetic shielding, we used a metallic box that accommodates the under test preamplifier stage and the necessary amplifying and filtering stage for noise investigation. Also, we used batteries for power supply of the total circuitry. The SMA output provides noise measurements using digital oscilloscope. In order to achieve efficient estimation on equivalent input noise, the preamplifier inputs are shortened and the power supply is provided. Measuring the total output noise at several sequential snapshots, we made observations that confirm datasheet noise parameter value

Back to article page