Lime Microsystems
Software Defined Radio


An embeddable, high-performance SDR in a Mini PCIe form factor

$114,052 raised

of $1 goal

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LimeSDR XTRX is high-performance software-defined radio (SDR) board in a compact Mini PCIe form factor. With an AMD Artix™ 7 XC7A50T-2CPG236I FPGA and a Lime Microsystems LMS7002M RF transceiver at its core, LimeSDR XTRX is a perfect platform for developing logic-intensive digital and RF designs.

LimeSDR XTRX (top)

LimeSDR XTRX is a suitable building block for MIMO configurations from 2Tx2R to 32Tx32R. It can be used in conjunction with digital processors (ASICs, GPPs and GPUs) of varying speed, power dissipation, and cost to fit any air interface, whether narrowband or broadband. The board is designed for the following key feataures:

LimeSDR XTRX (bottom)

Open Source

LimeSDR XTRX is based on the Fairwaves XTRX Rev 5, with many many refinements and updates. We will review all the changes in a future update. One of the biggest changes is that we have open sourced the design files and documentation, so you can start exploring LimeSDR XTRX for yourself. Altium project files and their outputs, including BOM, schematics, and layout, are available in the LimeSDR XTRX GitHub repository. Project files that can be run on the free (as in beer) version of Xilinx Vivado v2022.1 (64-bit) are available in the LimeSDR XTRX FPGA gateware GitHub repository. Source files in both of these repositories are published under the Solderpad Hardware License v2.1.

Support & Documentation

As a full-fledged member of the LimeSDR family, LimeSDR XTRX benefit from the same support as other LimeSDR products, which means any existing LimeSDR-family application can work on LimeSDR XTRX once it is rebuilt with the latest verions of any library that supports LimeSDR. In addition, the legacy gateware and driver for the original XTRX is still available to aid in the transition to LimeSDR XTRX, though the legacy versions will not be actively maintained.

Resources to get started with LimeSDR XTRX include:

Block Diagram

Features & Specifications

LimeSDR XTRX (bottom and top)

Board Overview

LimeSDR XTRX overview (top)
LimeSDR XTRX overview (bottom)

Manufacturing Plan

We have working prototypes and are ready to go into production using the same trusted manufacturing partners we’ve used to deliver other products in the Lime family. Our engineering team will be on site in Serbia for manufacturing and final assembly of LimeSDR XTRX. Being on site will allow us to adjust the production process very quickly and test the final product right away.

Fulfillment & Logistics

After completing production, we’ll send everything to Crowd Supply’s fulfillment partner, Mouser Electronics, who will distribute products to backers worldwide. You can learn more about Crowd Supply’s fulfillment service under Ordering, Paying, and Shipping in their guide.

Risks & Challenges

As is lately often the case, the biggest risk we face is supply chain uncertainty. From finding reliable sources of components, to being on site for production, we’ve made every effort to ensure smooth delivery to backers. Should something nonetheless go wrong, we’re committed to communicate openly and honestly about what’s going on and what we’re doing to fix it. We appreciate the trust you put in us!

LimeSDR XTRX is part of AMD FPGA Playground

Key Components

Artix™ 7 XC7A50T-2CPG236I · FPGA

In the Press

EE News Europe

"The LMS7002M field-programmable radio-frequency chip which drives the LimeSDR XTRX offers two receive and two transmit channels with 30.72MHz of bandwidth each, covering a frequency range from 30MHz to 3.8GHz."

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Produced by Lime Microsystems in Guildford, England.

Sold and shipped by Crowd Supply.


$799 Free US Shipping / $18 Worldwide

U.FL-to-SMA Cable

From the Crowd Supply Basics project.

A Hirose U.FL to SMA (jack) bulkhead straight connector with a 1.32 mm diameter cable. Less than -2 dB cable insertion loss up to 6 GHz. Both connectors are gold-plated brass and the cable conductor is silver-coated copper.

$8 $8 US Shipping / $18 Worldwide

4G/LTE External Antenna

From the Crowd Supply Basics project.

Abracon External Antennas exhibit low return loss characteristics, high gain, and Low Voltage Standing Ratio (VSWR). These external antennas are linearly polarized and come in a low profile package.

$12 $8 US Shipping / $18 Worldwide

Active GPS Antenna

From the Crowd Supply Basics project.

A low-noise active GPS antenna suited for the GPS L1 band. Accepts 3-5V DC and outputs RF via an SMA(m) connector. Optional adhesive mounting.

$11 $8 US Shipping / $18 Worldwide

About the Team

Lime Microsystems

Guildford, England  ·  ·   myriadrf  ·   LimeMicro  ·   limemicro

Working toward the democratization of wireless communication through an open source ideology.

Zydrunas (Zack) Tamosevicius
Ebrahim Bushehri
Andrew Back
Karolis Kiela
Aleksandr Vasjanov
Dovydas Rusinskas
Tomas Servenikas

See Also

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