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I’m building a lab-grade signal-testing platform and need a complete RF front-end that cleanly spans 400 MHz to 1.5 GHz. Because the board will sit in front of a vector signal analyzer, flat amplitude response, low noise, and good linearity across that entire band are far more important to me than squeezing every last decibel of efficiency. All common modulations—AM, FM, FSK, QPSK—must pass, yet the design has to pay special attention to QAM and DSS, which are the test cases I run most often. If a clever topology lets you optimise EVM for QAM while still keeping DSS spectral purity high, that’s exactly what I’m after. I have no allegiance to any particular vendor or part family, so feel free to choose components that best balance performance, cost, and availability. Just make sure they’re something I can actually buy in 2024. Deliverables • Schematic with all component values and part numbers • Simulated plots (gain, NF, IIP3, VSWR) showing compliance over 400-1500 MHz • PCB layout files (Altium, KiCad, or ADS preferred) plus Gerbers/ODB++ • Bill of materials with distributors and stock codes • A brief design note explaining critical choices and expected test results Acceptance criteria: the simulated gain ripple must stay within ±1.5 dB, NF below 4 dB, and input VSWR better than 2:1 across the band when measured on a calibrated VNA. If you already have experience in Keysight ADS, HFSS, or similar RF toolchains and can turn around a manufacturable design quickly, let’s talk.
Projekt-ID: 40103352
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7 Freelancer bieten im Durchschnitt $188 USD für diesen Auftrag

KINDLY READ THROUGH MY PROPOSAL THIS IS WHAT I WILL DO DETAILED APPROACH - Design 400-1500 MHz RF front-end optimized for QAM EVM + DSS spectral purity using wideband LNA, gain blocks, and matching networks. - Simulate in ADS/HFSS for ±1.5 dB gain flatness, <4 dB NF, <2:1 VSWR across full band. - Layout PCB with controlled impedance, RF shielding, and thermal management. DELIVERABLES - Complete schematic + part numbers. - Simulated plots (gain/NF/IIP3/VSWR). - PCB files + Gerbers/ODB++. - BOM with 2024 stock codes. - Design note on QAM/DSS optimization. EXPERIENCE 500-2GHz test equipment front-ends for VSA platforms. QAM/DSS linearity optimization in ADS. Multiple lab-grade RF PCBs fabricated. QUESTIONS Target gain (10-20 dB?) and P1dB/IIP3 requirements? Input/output connectors (SMA/N?)? ESTIMATED TIME: 3-5 days.
$130 USD in 3 Tagen
6,4
6,4

I’m Abbas from SMB ElectroTech. We’re an OEM/ODM electronics engineering firm that designs and delivers custom IoT and embedded hardware for startups, SMEs, and global teams. We specialize in precision PCB design, IoT sensor nodes, and gateways, and take products from concept through fully tested, production-ready hardware. Our clients work with us when they need engineering depth plus reliable manufacturing execution, without building an in-house team. If you’re working on an IoT or embedded product and need a dependable technical partner, I’d be glad to explore whether we’re a fit. Regards Abbas JawadWala SMB ElectroTech
$140 USD in 7 Tagen
5,9
5,9

Hi, I am RF design engineer having expertise in designing RF/Microwave circuits and systems. My core expertise included the RF front end (RFFE) design for various applications including wideband RF receivers and real time spectrum analyzers. I have hands on experience on Keysight ADS and SystemVue. Please reply me back to further discuss your task. Thanks
$500 USD in 7 Tagen
2,0
2,0

As an experienced Full Stack Developer and AI Specialist, my skillset goes beyond the traditional boundaries of software development. I'm a firm believer in applying innovative solutions across different domains, including electronics. Taking inspiration from my experience in backend, frontend, mobile app, and desktop application development, I can guarantee a comprehensive approach to your RF front-end project. In addition to my proficiency in languages like PHP, Python, Java, C++, Lua, and C#, I am well-versed in various frameworks and platforms such as Symfony, Django, Spring Boot, Android Studio; - a testament to my adaptability. Furthermore, I have substantial knowledge of AI integration using TensorFlow and PyTorch which can come handy in exploring newer possibilities for your project. Letting me tackle your project means the utilization of my multi-faceted skill set at its best. My ability to translate complex requirements into practical designs makes me an ideal fit for your RF front-end task. Contact me today and together we'll make sure that you get a top-notch solution that exceeds your expectations.
$140 USD in 7 Tagen
0,0
0,0

Hello, I’m a hardware and RF engineer with a background in designing wideband front-ends and high-performance signal chains. I have experience building lab-grade boards where maintaining signal integrity and flat frequency response is the top priority. I’ve reviewed your requirements for the 400 MHz to 1.5 GHz front-end and the need for high linearity for QAM and DSS testing. I can deliver a clean, production-ready design that meets your specs for gain flatness, low noise, and stable VSWR across the entire band. I’m happy to help with this design—let me know if you’d like to talk about the details.
$80 USD in 7 Tagen
0,1
0,1

I am an Electronics Engineering student with strong practical experience in ESP32 and Arduino-based projects, including IoT systems, sensor integration, motor control, and PCB designing. I have worked on real-time monitoring systems using Firebase, robotics and automation projects, drone and balancing systems with MPU6050, and various sensors such as DHT22, MQ series, ultrasonic, and water sensors. I write clean and optimized code, provide clear circuit guidance, and ensure reliable project delivery with proper documentation and explanations. I am confident I can understand your requirements quickly and deliver accurate, high-quality results within the given timeline
$85 USD in 10 Tagen
0,0
0,0

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