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How Much Power Must We Extract From a Receiver Antenna to Effect Communications?

Submitted by admin on Wed, 03/26/2025 - 20:45

Subject to the laws of classical physics -the science that governs the design of todays wireless communication systems -there is no need to match the radiation impedance of a receiver antenna to the impedance of the front-end electronics in order to effect communications. If we dispense with a transmission line and, instead, make the front-end electronics colocated with the antenna, then a high input-impedance preamplifier can measure the open-circuit voltage directly on the antenna port while drawing negligible power.