Enterprise AI Analysis
Design of a wideband RF rectifier for enhanced wireless power transfer in biomedical implants supporting white space WiFi and LTE bands
This paper introduces a high-efficiency, wideband RF-rectifier utilizing a two-branch cell configuration, L-shunt matching network, radial stub, and series inductor. Optimized for 2.37–2.70 GHz (white space Wi-Fi and LTE bands), it achieves a peak Power Conversion Efficiency (PCE) of 66.25% at 5 dBm input power. It maintains 11.50–13.5% PCE at -20 dBm, ensuring reliable operation over a wide input power spectrum. Fabricated on RT/Duroid, its compact 19.75 mm × 15.20 mm footprint and single series diode configuration, coupled with a sequential matching technique, make it highly suitable for wireless power transfer in biomedical implants requiring strict ambient power control.
Executive Impact Summary
This novel wideband RF-rectifier delivers critical advancements for wireless power transfer (WPT) systems, particularly for biomedical implants, by optimizing efficiency and bandwidth across key communication spectra.
0%
Peak PCE at 5 dBm
0 MHz
Operational Bandwidth
0 λ²
Ultra-Compact Normalized Size
Deep Analysis & Enterprise Applications
Select a topic to dive deeper, then explore the specific findings from the research, rebuilt as interactive, enterprise-focused modules.
Rectifier Design Methodology
Enterprise Process Flow
Define Architecture (L-section MN & MLN)
→
L-shunt Matching Network Design
→
Transmission Line Conjugate Matching
→
DC Pass Filter Integration
→
Pre-design Simulation & Parameter Determination
→
Lumped Element Incorporation
→
SSrd, MLN, Radial Stub Integration
→
Fine-tuning & Optimization
Rectifier Architecture Overview
The proposed RF-rectifier comprises two primary sections: an L-section Matching Network (MN) and a Meandered Line Network (MLN). The core function relies on HSMS-2850 Schottky diodes (D1, D2) configured in a single series diode (SSrd) arrangement, known for its high efficiency at low input power. The MN is critical for achieving optimal impedance matching (IM) by aligning the rectifier's input impedance with the antenna's impedance, ensuring a 50 Ω interface. Components like impedance transformers (Tp, Tq), radial stubs (Rs1, Rs2), and series inductors (Lp, Lq) are strategically integrated to convert complex input impedance and facilitate optimal power transfer. A sequential matching technique ensures wide impedance bandwidth, crucial for operating across diverse frequency bands.
Key Performance Indicators
66.25%
Peak Conversion Efficiency Achieved at 5 dBm Input Power
330 MHz
Broad Operational Bandwidth Covering 2.37-2.70 GHz (White Space Wi-Fi & LTE)
Comprehensive Performance Summary
Both simulation and measured results confirm the rectifier's robust performance. The return loss (S11) consistently remains below -10 dB across the entire 2.37-2.70 GHz range, demonstrating excellent impedance matching. The Power Conversion Efficiency (PCE) peaks at 66.25% at 5 dBm, and critically, maintains 11.50% to 13.5% PCE even at -20 dBm, highlighting its effectiveness for ambient RF energy harvesting. Operation in a minced meat phantom validated its performance under tissue loading, showing consistent results with minor shifts. The rectifier also exhibits optimal performance across a wide range of load resistances, with a peak PCE of 70% at 3.5 kΩ.
Innovation & Benchmarking
| Feature | Proposed Design | Reference [20] | Reference [21] | Reference [26] |
|---|---|---|---|---|
| PCE (Peak) | 66.25% at 5 dBm | 63.00% at 12 dBm | 81.7% at 12 dBm | 60% at 20 dBm |
| Frequency (GHz) | 2.37-2.70 | 2.4/5.8 | 0.915, 2.45 | 2.45 |
| Bandwidth (MHz) | 330 | Narrowband | Narrowband | 200 |
| Normalized Size (λg × λg) | 0.27 × 0.21 | 1.37 × 0.83 | 0.36 × 0.20 | 0.47 × 0.25 |
| Pin Range (dBm) | -15 to 5 | 5-25 | -10 to 10 | -10 to 30 |
Strategic Advantages for Biomedical Implants
This rectifier stands out by overcoming limitations in existing designs. Its novel dual-branch configuration and sequential matching technique lead to superior efficiency at lower input powers compared to many counterparts, which is critical for ambient RF energy harvesting. The ultra-compact footprint (0.27λg × 0.21λg) makes it ideal for size-constrained biomedical implants without compromising performance. Crucially, it offers a wide operational bandwidth of 330 MHz, covering the 2.37-2.70 GHz range relevant to white space Wi-Fi and LTE, ensuring robust operation against frequency shifts and compatibility with multiple communication standards. This combination of miniaturization, high efficiency, and wideband functionality provides a highly practical and effective solution for Wireless Power Transfer (WPT) in demanding biomedical applications.
Calculate Your Potential AI Impact
Estimate the time savings and financial benefits your organization could achieve by integrating advanced AI solutions derived from cutting-edge research.
Estimated Annual Savings
$0
Total Hours Reclaimed Annually
0
Your Implementation Roadmap
A typical project timeline for integrating advanced AI solutions, tailored to enterprise needs.
Phase 1: Concept & Feasibility Study
Initial assessment of project goals, technical requirements, and potential impact. Develop a clear scope and resource allocation plan.
Phase 2: Design & Simulation
Detailed design of the AI system architecture, including component selection, network configurations, and comprehensive simulation to predict performance.
Phase 3: Prototype Fabrication & Testing
Building and rigorous testing of initial prototypes. Validate core functionalities and identify areas for improvement in real-world conditions.
Phase 4: Optimization & Refinement
Iterative process of fine-tuning the design based on testing results. Focus on maximizing efficiency, bandwidth, and reliability for target applications.
Phase 5: Integration & Deployment
Seamless integration of the finalized solution into existing enterprise systems. Comprehensive training and ongoing support for sustained performance.
Ready to Transform Your Enterprise?
Leverage cutting-edge research to develop bespoke AI solutions. Book a free, no-obligation strategy session with our expert team to explore how these innovations can drive your business forward.
Ready to Get Started?
Book Your Free Consultation.
Let's Discuss Your AI Strategy!
Lets Discuss Your Needs
Select a Date
Sun
Mon
Tue
Wed
Thu
Fri
Sat