28 GHz RF downconverter with IF 5-6Ghz

@engrusmanfaiz

Hello Farbazz, I have reviewed your project requirements for the 28 GHz double-balanced Gilbert mixer, and I am confident in delivering a tape-out-ready design with full post-layout reliability. Scope of work: • Complete audit of existing Cadence schematics, models, and SpectreRF testbenches • Optimization of biasing, device sizing, and RF/LO/IF matching networks • Full refinement of the LO doubler and buffer chain to resolve signal integrity and feedthrough issues • Comprehensive design analysis including conversion gain, S11, noise, linearity, and LO-RF isolation • Post-layout parasitic extraction (PEX) validation and performance closure • Corner simulations (PVT) with detailed reporting and design justification Timeline: • Initial audit and issue report: 2–3 days • Design optimization and integration: 5–7 days • Post-layout validation and final report: 4–5 days Total estimated duration: 10–14 days All deliverables will be clean, hierarchical, and ready for tape-out, including simulation results and a concise technical report covering all key trade-offs. Looking forward to working with you. Regards, Engineer Mumal Zaman RF Expert | PCB Design

@riab54

Hello, Your project clearly targets a tape-out-ready mm-wave design, and I understand that this is not just a simulation task but an industry-level integration and optimization effort. At 28 GHz, with strict requirements on conversion gain, S11, and LO integrity, the complexity is inherently very high and requires careful, experience-driven handling. I, along with my team, have prior experience working on industry-oriented RF/analog designs up to tape-out readiness, including mixer architectures and SpectreRF-based validation flows. We are comfortable with the complete cycle—starting from schematic audit and refinement to parasitic-aware optimization and final verification. Before proceeding, I would like to clarify a few important points: Should the scope include layout, PEX, LVS/DRC, and post-layout validation, or remain limited to schematic-level refinement and analysis? Given the high complexity and tape-out expectations, the budget may need alignment, especially if extensive simulations and full verification are required. I would suggest a brief discussion to finalize scope, deliverables, and timeline.

@engrhasan01

Hi, I can help take your 28 GHz double-balanced Gilbert mixer from pre-layout to a tape-out-ready design with full post-layout confidence. I’m an Electrical and Analog Design Engineer with 5+ years of experience in CMOS mm-wave circuits, including mixers, LO chains, and high-frequency matching networks using Cadence Virtuoso (SpectreRF, ADE L/XL). I will thoroughly audit your existing schematics and simulation setup, optimize biasing and device sizing, and resolve LO doubler integrity issues such as phase noise, feedthrough, and signal degradation. My focus will be on achieving your target conversion gain, input matching (S11), and stable operation across PVT corners, ensuring robust integration of RF, LO, and IF paths. I have a dedicated team capable of handling all types of RF, analog IC, and high-frequency design projects, ensuring timely and professional delivery. Deliverables: Reviewed and optimized hierarchical Cadence schematics SpectreRF simulations (PSS, PAC, PXF, PNOISE, HB as required) Gain, S-parameters (S11), NF, linearity, and LO leakage analysis LO doubler optimization with improved phase noise and signal integrity PVT corner simulations (process, voltage, temperature) Design trade-off report with clear analysis and recommendations Pre-layout readiness checklist for smooth layout transition