LimeNET Micro 2.0 DE (Developer Edition) is a modular radio platform that leverages the Raspberry Pi Compute Module 4 (CM4) and LimeSDR XTRX for their respective computing and RF features. It is based around the new LimePSB RPCM, a planar system — a.k.a. "main" — board, which is significantly more versatile than the previous version of LimeNET Micro, which was limited by its support for a less powerful compute module (CM3) and an integrated SISO radio.

The LimeNET Micro 2.0 DE kit is comprised of LimePSB RPCM, Raspberry Pi CM4 and LimeSDR XTRX, which together form a complete baseband plus RF solution and is an ideal tool for a wide range of wireless applications.

Features & Specifications

LimePSB RPCM provides access to all of the connectivity and functionality of the CM4 and LimeSDR XTRX boards at its heart. That includes:

• USB 2.0 Type-C socket (boot and power delivery)
• Dual USB 2.0 Type-A sockets (downstream ports) or a front-panel USB 2.0 header (unpopulated)
• Gigabit Ethernet jack with PoE support
• Mini PCIe x1 Gen 2 (5 Gbps)
• 2x HDMI 2.0 receptacles (up to 4K 60P supported)
• 2x 15-pin FPC connectors for MIPI DSI display and CSI camera
• 3.5 mm, 4-pin jack for analog audio and composite video
• MicroSD card slot
• NanoSIM socket
• Coaxial RF (4x SMA female + 4x U.FL female) connectors for RF frontend
• Coaxial pass-through U.FL to external SMA connector
• 20-pin Raspberry Pi CM4 GPIO header (3.3 V)
• 14-pin Raspberry Pi CM4 SYS header
• 5-pin front display connector (power, I²C, button)
• Raspberry Pi CM4 UART0 header (unpopulated)
• 2-pin and 4-pin fan connector at 5 V (default), 3.3 V, or VCC_INT voltage

An integrated 2x2 MIMO front end module (FEM) provides higher output power using Qorvo driver amplifiers for a more comprehensive coverage range while keeping the frequency flexibility of the original LimeNET Micro. It also features integrated low noise amplifiers (LNAs) and SPDT switches that provide for both FDD and TDD modes of operation.

We will reveal more new features, enhancements, and applications of LimeNET Micro 2.0 Developer Edition before and during the campaign.

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