Small LTE Modem PCB Design

@markoa7

Hello, I’ve reviewed your requirement for a compact LTE modem PCB using a Simcom module, optimized for EasyEDA and JLCPCB manufacture within a 50x50 mm footprint. I will design a clean, BOM-friendly layout that handles a 12V supply and a 5V serial interface, with careful power regulation, decoupling, and RF shielding to minimize noise. The work will include a complete schematic, PCB layout, and fabrication-ready Gerbers and pick-and-place data, with test points for quick validation. I’ll also ensure the SMA connector is a straight type as requested and that impedance-controlled traces meet the modem’s requirements. What are the target LTE bands and the preferred SIM interface for the Simcom module (e.g., UART, USB) to ensure firmware compatibility? Best regards, Marko Aleksic

@hayteekeys

Hi, KINDLY READ THROUGH MY PROPOSAL THIS IS WHAT I WILL DO - Design a compact LTE modem PCB (<48×48 mm) in EasyEDA for direct JLCPCB fabrication. - Use your chosen Simcom module (A7670/A7672/SIM7600 etc.), 12V → 4.0V buck (efficient, low-noise), 5V TTL serial with proper level shifting, straight SMA connector with short 50Ω trace. - Add power filtering, ESD protection, status LEDs, and test points while keeping layout clean for EMI. - Deliver: full EasyEDA source files, Gerbers, drill, pick-and-place, BOM with LCSC part numbers, and assembly notes. RELEVANT PROJECTS - 2025: 45×42 mm Simcom A7670 LTE board (12V input, 5V serial, SMA) – JLCPCB 100 pcs, fully functional. - 2024: SIM7600G-H compact modem for industrial tracker – same size/power constraints, passed field tests. QUESTIONS - Exact Simcom module model? - Any extra interfaces needed (USB, GPIO, I²C)? - Required peak current (for buck selection)? I am an EasyEDA + Simcom specialist. Ready to deliver complete JLCPCB-ready files in 4–6 days. Let’s start and please send the module model and we’ll begin immediately!

@AwaisChaudhry

Hello, I will design a compact LTE modem PCB under 50x50 mm using a Simcom module, ready for JLCPCB and built in EasyEDA. The plan covers 12V input, 5V serial interface, straight SMA antenna connector, and clean power and signal routing with attention to decoupling, EMI, and thermal paths. You’ll get a fabrication-ready layout, complete schematic, Bill of Materials, and a simple test plan for early validation. I’ll follow a structured flow: confirm requirements, create schematic, route the PCB with tight power and RF considerations, check DRC and SI/PI, and hand over EasyEDA files, Gerber, and test guidance for quick prototyping. What exact Simcom module model and LTE bands are you targeting? Please review these important questions so I can align perfectly with your needs: What exact Simcom module model and LTE bands are you targeting? Do you need any backpower protection or specific ESD/EMI requirements? Which power and serial connector specifications are preferred (pitch, voltage, current)? What is the antenna plan and any RF matching or test methods to use on the bench? Any thermal constraints or enclosure size limits beyond the 50x50 mm footprint? What are the FCC/CE or other regulatory testing expectations and timelines? Do you have a preferred BOM source or footprint constraints for JLCPCB? What is the desired programming interface and boot sequence for the modem? What is your target timeline and number of revisions expected?

@manusharma2992

Hello mate, When i seen the details "Small LTE Modem PCB Design" which you are searching. I am super exited to start it ASAP! I have many software's & tools for make it- Ki Cad, Autodesk EAGLE, Altinum, Circuit board design, Autodesk fusion 360 etc. Make 2d & 3d both I will share update within it in 1-2 Hours. Best regards, Manu R.

@beingmrme

HI, 25 years’ experience | Solution: I will deliver a small LTE modem PCB design engineered for wireless connectivity, signal integrity, and manufacturability — complete with schematics, optimized layout, and production-ready files. ✅ Solution: Professional PCB design including schematic, layout, Gerbers, and design review for fabrication and testing. 1️⃣ Do you have module choice, band requirements, and RF constraints to start with? 2️⃣ Should the design include power management, SIM interface, and antenna matching? 3️⃣ What deliverables do you need — Gerbers, BOM, CAD files, or test reports? We will work as per Freelancer.com’s terms and policies. Warm regards, The Blend Nation

@abdurRafiqM

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@hancho6319

Drawing from my extensive background in Embedded Systems Engineering as well as Electrical & Electronics Engineering, I bring a solid foundation to the task that extends beyond mere proficiency with EasyEDA and Simcom modules. Having specialized in designing embedded systems encompassing circuitry, sensor integration automation, and PCB design using similar Electronic Design Automation (EDA) tools like KiCad and EasyEDA pro, I know how to optimize PCB layouts to align with your dimensions and manufacturing requirements. Like your vision for this project, I believe in building solutions that are both efficient and intelligent. It bodes well for you since I've recently expanded into the fields of Artificial Intelligence using Python-based models for data analysis and manipulation as well as automation- a skillset that can potentially work wonders when stretching the limits of IoT solutions like LTE modems. Furthermore, my experience with JLCPCB adds value to your project as it demonstrates my acumen in translating designs into manufacturable units while ensuring strict adherence to manufacturing guidelines. With this package of skills and relevant experience in designing embedded systems with Arduino, ESP32, STM32, products such as yours are bound for success with me at the helm. Let us join forces now!

@bjorkb

I have just completed a similar project. Designed a 45mm x 45mm LTE modem PCB with Simcom module, achieving seamless 5V serial communication and reliable 12V DC power integration, ready for JLCPCB manufacturing. You won’t find a specialist more precisely aligned with the technical and operational demands of this project. I understand the importance of compact layout and compliance with JLCPCB’s manufacturing standards for optimal performance. Expertise includes EasyEDA PCB design, Simcom LTE module integration, and transforming complex specs into manufacturable, high-quality boards. I’d love to chat about your project! The worst that can happen is you walk away with a free consultation. Regards, Bjork Bronkhorst

@Aaleen110

I have extensive experience designing compact, high-performance IoT hardware using the Simcom ecosystem, specifically integrating the A7670 and SIM7600 series into space-constrained industrial applications. My previous projects involved creating custom LTE-CAT1 and NB-IoT solutions where power management and RF sensitivity were the primary design challenges. I am intimately familiar with the layout requirements for cellular modules, particularly the critical nature of the main VBAT supply and the impedance-matched RF paths necessary to pass carrier certification and ensure reliable field performance. My technical approach centers on a robust 4-layer PCB architecture that ensures a continuous ground return path for the RF signals while minimizing electromagnetic interference across the board. I will implement 50-ohm controlled impedance traces for the cellular antenna and integrate high-transient response power circuitry to handle the module's peak current demands without voltage drops. To keep the design manufacturable and cost-effective, I utilize industry-standard design rules for SMT assembly and will provide a comprehensive documentation package, including optimized Gerbers, a localized BOM with active supplier links, and precise Pick-and-Place data. I will also incorporate TVS diodes on the SIM interface and USB lines to ensure long-term field reliability. Which specific Simcom module have you selected for this design, and does the project require a secondary GNSS antenna or integrated battery charging circuitry? I am also curious about your target dimensions for the board to determine if we should utilize double-sided component placement. I’m available to discuss these technical specifics over chat or a brief call to ensure the schematic aligns perfectly with your production goals.