Monday, April 22, 2024

SDR Radios - Hardware & Software Links

A Software-Defined Radio (SDR) is a wireless radio system that uses software to process radio signals instead of using hardware components. SDRs use software-based algorithms to configure radio parameters like frequency, modulation, and operating modes. This eliminates the need for hardware components like mixers, modulators, and demodulators. 

A basic SDR system consists of a computer with speakers, headphones, or some other analog-to-digital converter, preceded by some form of RF front end; such as a USB radio transceiver and size of antenna. 

Commercially available SDR hardware can transmit and receive signals at various frequencies depending on its internal hardware, and the type (and size) of antenna that you are using. The aim of these SDR devices is to reduce the overall cost of access and use of RF hardware technologies and provide end-users with access to ubiquitous wireless.

SDR Radios:

SDR Radio "Add-Ons":

Antennas:

What Size Antenna Do You Need?

Di-Pole Antenna Size Formula:

468 / Frequency = Antenna Size in Feet

  • Divide 468 / by the frequency you want to tune in to:
    The answer you get will be your needed antenna size in "Feet".
    468 / 443.2Mhz = 1.06ft
  • Multiply the "Feet" total by 12 to convert your antenna size into inches:
    1.06ft * 12 = 12.67"
  • Divide your Antenna Size in inches by 2 to get your "Per-Element" size, in inches:
    12.67" / 2 = 6.34" Each Side

SDR Radio Software:

SDR Software Add-ons:

Radio Programming:

Radio Websites:


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