2019 Volume 4 Pages 1-4
In this research, a W-band 94 GHz rectenna for high power application is being studied. In Wireless Power Transfer (WPT) using RF power source, as the frequency is higher, the beam is less likely to spread and the receiving power density is high, so the W-band is expected to be applied to power supply of a flying vehicles. On the other hand, it is difficult to fabricate and evaluate circuits accurately in W-band because of the tiny size. In this paper, firstly, accurate transmitting efficiency of finline, which is WG-MSL transducer used to feed directly to the circuits from an oscillator, was measured. Also, fabricating method was improved by comparing three methods. After preparing the basis for accurate evaluation, two types of rectifiers were designed, fabricated and measured. Notch filter type rectifier record the rectifying efficiency of 35.0% under 117 mW input. The output DC power was 41.0 mW under the condition.
