RF-DC Converter Assembly

RFD-ASSY-01 – Microwave Energy Harvesting System


The RFD-ASSY-01 is a medium Power RF-DC converter printed circuit board assembly using four RFD102A’s with a 4-way power divider and one RFD88A energy harvesting engine module. The design delivers 3-4x higher output currents than a standalone RFD102A-TB and when used with a super capacitor the system can output up to 140mA intermittently. The assembly can produce up to 60mA continuous current and ~40% RF-DC conversion efficiency into a 1kOhm load from 18dBm…29dBm input power at 2.45GHz.


Product Description

The RFD-ASSY-01 is a broadband Microwave Energy Harvesting reference design that uses four RFD102A’s (RF-DC converters) and one RFD88A (energy harvesting engine) to deliver higher regulated power to your application. The design can be connected to a log periodic antenna and is able to convert RF/microwave power from 1MHz…6GHz to a DC voltage for use with medium power battery free applications. The design is extremely flexible with header holes for soldering supercaps directly to the circuit board.  This design delivers up to 60mA DC from the unregulated DCIN pin and delivers up to 140mA intermittent current on the regulated DCOUT output pin. This design is a great starting point for electromagnetic energy harvesting projects when used with a log periodic or high directivity antenna and a known microwave energy source. When compared to the RFD102A-TB, the RFD-ASSY-01 needs approximately 4x more input power to achieve the same output voltage.  However, the RFD-ASSY-01 can produce up to 4x the current at similar RF-DC conversion efficiencies (~40% from 18dBm…30dBm). Jumpers (not included) are used to set the upper DC voltage out of the design. In the default state the upper output voltage is limited to 5.2V. The upper output voltage can be reduced to be 3.0V by grounding header pin 5 to pin 4. The upper output voltage can be reduced to 2.5V by grounding pin 3 to pin 4. The design will shut off its output pin once the supercapacitor has discharged to 1.0V and it will recharge again until the upper voltage is reached. The Energy Harvesting System can be customized upon request with the following options: RFD-ASSY-01: Baseline design. $75 RFD-ASSY-01B: RFD88A removed. $75 RFD-ASSY-01C: 1F, 5.5V Super Capacitor Soldered to DCIN/GND. $85 RFD-ASSY-01D: RFD88A removed. 1F, 5.5V Super Capacitor Soldered to DCIN/GND. $85 We also have project boxes and mounting screws for this design and provide these for $10 upon request. Please view our datasheet: RFD-ASSY-01_latest

Additional Information

Design Style

Baseline design, RFD88A removed, 1F, 5.5V Super Capacitor Soldered to DCIN/GND, RFD88A removed. 1F, 5.5V Super Capacitor Soldered to DCIN/GND