Best Antenna and Rectifier Diode

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SUMMARY

The discussion centers on optimizing voltage reception from antennas and selecting rectifier diodes with low voltage cut-off. Key recommendations include using RF-specific amplifiers from Analog Devices and low-loss 50-ohm coaxial cables like RJ-58. For high impedance antennas, designs such as tuned loops and rhombic arrays are suggested, while germanium diodes are noted for their low voltage drop, with synchronous MOSFET detectors outperforming them. The conversation emphasizes the importance of frequency regulation and the need for precise application details to provide effective solutions.

PREREQUISITES
  • Understanding of RF antenna design principles
  • Familiarity with impedance matching concepts
  • Knowledge of rectifier diode types and characteristics
  • Awareness of frequency regulations in RF applications
NEXT STEPS
  • Research "RF Amplifiers" from Analog Devices for optimal voltage reception
  • Explore "Tuned Loop Antenna" designs for high impedance applications
  • Study "Synchronous MOSFET Detectors" for improved rectification
  • Investigate local frequency regulations and licensing requirements for RF transmission
USEFUL FOR

Electronics engineers, RF designers, hobbyists building rectennas, and anyone involved in optimizing antenna performance and rectification systems.

  • #31
To extract significant power you must tune your antenna and the coupling to the rectifier. The tuning will be frequency dependent so all your frequencies will need to be within about one percent of each other.

There is also the problem of direction. To capture significant energy you need to aim your antenna, or it's reflector. Unfortunately, multiple transmit sites will probably not be in a line and in the same frequency band.
 
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  • #32
Thank you all for your help. This discussion can be closed.
 
  • #33
45tt, designing an antenna is not something that everyone can do. There are so many applications, types and considerations of antenna design that only professionals can design an antenna that can actually transmit some power. There are so many different types of antenna for so many different types of frequency with so many different power output specifications. For anyone to answer this question, it is important that you mention how much gain is required as well.
 

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