SparkFun will be closed on Monday, May 30th, for Memorial Day. We will resume normal business hours at 9am (MT) on Tuesday, May 31st. Orders placed after 2pm (MT) on Friday May 27th will process and ship out on Tuesday, May 31st. From all of us at SparkFun, we wish you a safe and happy Memorial Day weekend!

Crowd Supply LimeRFE Power Amplifier

Added to your shopping cart

The Lime RF Front End (LimeRFE) is an open hardware power amplifier (PA) module with appropriate filtering and support circuitry to augment the LimeSDR, LimeSDR Mini, and LimeNET Micro platforms, providing a complete solution that addresses real life applications ranging from HAM radio to standards-compliant cellular network implementations.

LimeRFE will enhance any LimeSDR based wireless project by providing:

  • A stronger, clearer signal when transmitting
  • Less noise when receiving
  • Improved range for both

A single LimeRFE covers three very different sets of bands: HAM, cellular, and wideband. The exact band used at any given time is software-selectable. By making the RF front end definable in software, LimeRFE is the next step in the evolution of software-defined radio.

  • Filtering
    • Each band has appropriate filtering both for Rx & Tx
    • Selectable AM/FM notch filter
  • Fully Open Source Software
    • Firmware
    • API support
    • GUI
    • LimeSuite integration
  • Control & Configuration
    • Programmable via Arduino IDE
    • Arduino Nano-compatible microcontroller (ATmega328)
    • FT232RL USB-to-serial converter
    • Host serial connection via USB mini Type B connector
  • Power & SWR Meter
    • 1 – 4000 MHz power & SWR meter (external directional coupler required)
    • Cellular bands Tx power meter (internal coupler)
  • 10-pin Interface to SDR
    • Power and ground
    • I2C (SDA and SCL)
    • 2x GPIO connected to on-board microcontroller
    • 4x bi-directional level shifted I/O
    • 1.2 – 5.5 V
    • Each I/O has a high voltage and power Darlington drive stage for inductive loads (e.g., coaxial relays)
    • Individually switchable direction (input/output)
  • Power Supply
    • Single 12 V supply
    • Optionally supply microcontroller and Rx channels via USB


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

Customer Reviews

No reviews yet.