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Wireless energy harvesting (WEH) from ambient electromagnetic fields is becoming an emerging technology that can be exploited as a power source for many low power electronic devices. A number of key challenges are identified but the optimum design of rectennas for ambient WEH is very challenging. This paper presents a review on recent progress in multiband and broadband rectennas for WEH and wireless...
In this paper envelope Modulation is applied to a class E RF power amplifier (PA). The class E PA is based around a GaN transistor and operates at 2GHz to achieve an efficiency of 74.4% at 11.5W output power (POUT) under continuous wave excitation. The envelope modulator consists of a Switched Mode Power Supply (SMPS) and a class G amplifier, resulting in a combined efficiency of 71.5%. In full Envelope...
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