Figure 1-4. The special rectenna made for the first microwave-powered helicopter. The array is 0. 6 meters square and contains 4480 IN82G pointcontact rectifier diodes. Maximum DC power output was 200 watts. Figure 1-5. Greatly improved rectenna made from improved diodes (HP2900) which are commercially available. The 0.3 meter square structure weighs 20 grams and can deliver 20 watts of output power.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==