Software-defined radios, or SDRs, aim to use software, instead of hardware, to receive radio waves.
While some hardware is necessary, obviously, the goal is to minimize traditional hardware-based radio tech. Instead, software algorithms, such as analog to digital converters, are used as much as possible.
A general-purpose processor is used to process radio waves. The idea here is that this processor can be used for other purposes, such as a GPS system, making SDRs more versatile than traditional radios.
While SDRs have its origins in the 1970s, it’s still an evolving technology. SDRs are becoming better and more advanced all the time.
Here are the best SDRs your money can buy.
The short version: The HackRF One is the best SDR on the market. Other good options include SDRplay and AFEDRI SDR-Net products.
Read on for the full list!
8 Best Software Defined Radios (SDRs)
1. HackRF One
The HackRF One from Great Scott Gadgets is an SDR device that can transmit and receive radio waves on a wide spectrum, from 1 MHz to 6 GHz.
One of the best things about the HackRF One is that it is an open-source hardware device. It has a fast rate of up to 20 million samples per second.
The device is durable, made of injected molded plastic. As a peripheral, you’ll stick it into your computer via a USB connection and use a compatible SDR software.
While Ubuntu is the recommended operating system to use, you can use it with all sorts of Linux releases and even Windows and macOS. Some of the compatible SDR software include SDR# and GNU Radio.
It can also be programmed to work as a standalone device.
The broad range spectrum is one of the main benefits of the HackRF One, as a lot of SDR devices have a much smaller range.
Explore more tools like HackRF One here.
2. SDRPlay RSP1A
If you are looking for an entry level SDR receiver, the SDRPLay RSP1A is an excellent choice. It covers the entire radio spectrum of 1kHz (VLF) to 2GHz, making it a good choice for an affordable wideband.
It works with the companion SDRuno software, which supports all the popular ham and shortwave broadcast bands. Furthermore, it will also work with third-party software like SoapySDR and HDSDR.
In addition, SDRPlay has just released the first preview of its new software, SDRconnect. Unlike SDRuno, which is only compatible with Windows, SDRconnect is multiplatform.
That means it can work on Windows, Mac, Linux, and Raspberry Pi.
Note that it does not come with USB cables or an antenna, which must be purchased separately.
The product ships worldwide, including to the United States and Canada.
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3. SDRplay RSPduo
The SDRplay RSPduo is another awesome product from SDRplay. This one is a dual-tuner receiver.
As a wideband receiver, both tuners can operate in the entire radio spectrum of up to 2GHz. When operating independently, each tuner will have a bandwidth of up to 10MHz.
However, when operating simultaneously, each tuner will have a bandwidth of up to 2MHz each. With external clocking features, it’s perfect for scientific and industrial use cases.
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4. AFEDRI AFE822x
The AFE822x from AFEDRI SDR-Net is a dual channel SDR, allowing for synchronized or independent channel reception.
When operating independently, each channel has a bandwidth of up to 2.2MHz for recording and processing. When operating simultaneously, each one has a bandwidth of up to 1100kHz.
It supports a frequency range of 100 kHz to 35.00MHz, which isn’t bad.
The device is compatible with various SDR software, such as WinRAD and HDSDR. Waterfall display, playback, and recording are supported through these third-party software.
To order, click on “Ordering Information” in the left-hand menu on the website.
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5. AFEDRI LAN-IQ SDR
If you are interested in a standalone SDR, consider the LAN-IQ from AFEDRI SDR-Net.
It supports a frequency range of 50 kHz to 1700.00MHz with a bandwidth of up to 2.2MHz. It has a LAN interface for remote access, with a 3.5” LCD touchscreen on the device itself.
As a standalone device, it supports digital processing, filtering, and decoding out of the box.
It also works with compatible software such as HDSDR and Linrad, with a USB connectivity interface.
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6. FUNcube Dongle Pro+
The FUNcube Dongle Pro+ is a new and improved version of the original FUNcube Dongle. It features an extended frequency range, complete coverage of the amateur 23 cm band, and an increased sample rate of 192kHz.
Other improvements include a new LNA and a TCXO rated at 0.5ppm, as well as 11 filters for front-end blocking.
It has a frequency range support of 150kHz to 1.9GHz, but there is a gap from 240MHz to 420MHz.
One benefit of the FUNcube Dongle Pro+ is that it doesn’t require any drivers, as device drivers are already included in operating systems such as Windows, Linux, and macOS.
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7. Nooelec NESDR Mini 2+
The Nooelec NESDR Mini 2+ is a low-cost, affordable software defined radio kit for those on a budget. It works on Windows, macOS, and Linux.
It is quiet and has a low battery consumption. Not only that, but it comes with a female SMA adapter, a mount, and a telescopic antenna free of charge.
The device features the R820T2 tuner IC by Rafael Micro, offering a great improvement compared to the performance of R820T tuner devices.
Overall, if you are looking for a budget option to learn SDR on the cheap, this is a good option for you.
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8. Nooelec NESDR Smart HF Bundle
Another good option is the Nooelec NESDR Smart HF Bundle. This SDR set operates in the 100kHz-1.7GHz range.
This wideband solution is perfect for those looking to learn SDRs and interested in HF bands. It uses the “Ham It Up” up-converter to receive HF waves, offering improved performance.
Adapters, three antennas, and a balun are all included.
The product comes with a two-year warranty, and 24/7 support is provided.
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Conclusion
There are a few other products worth looking into, including iCom and Airspy products.
Nevertheless, the eight options listed above are the best SDRs currently on the market.
Regardless of whether you’re a newbie to SDR or have extensive experience, you will find something for your budget in this list.
Tom loves to write on technology, e-commerce & internet marketing. I started my first e-commerce company in college, designing and selling t-shirts for my campus bar crawl using print-on-demand. Having successfully established multiple 6 & 7-figure e-commerce businesses (in women’s fashion and hiking gear), I think I can share a tip or 2 to help you succeed.