2450 MHz Water Load for Microwave Power Absorption (HY-W26FA & HY-W22FA)

Overview

The HY-W26FA and HY-W22FA water loads are precision-engineered RF termination devices designed for safe, stable, and highly efficient absorption of microwave energy at the industrial, scientific, and medical (ISM) band frequency of 2450 MHz. Operating on the principle of resistive dissipation via deionized water circulation, these loads convert incident electromagnetic energy into thermal energy with minimal reflection—enabling reliable power calibration, system tuning, and dummy-load testing in high-power microwave systems. Their robust coaxial-to-waveguide transition architecture ensures mechanical stability under continuous duty cycles, while the low VSWR (≤1.10) guarantees minimal standing wave formation and protects upstream sources—including magnetrons, solid-state amplifiers, and circulators—from reflected power damage.

Key Features

• Optimized thermal management via closed-loop deionized water cooling, supporting sustained operation at rated power levels (1–10 kW) without thermal runaway or dielectric breakdown.
• Waveguide interface compliance with standard rectangular waveguide specifications: BJ-26 (WR-340, 86.36 mm × 43.18 mm) and BJ-22 (WR-430, 109.22 mm × 54.61 mm), enabling direct integration with common microwave transmission lines.
• High-precision internal load geometry—tapered water column and optimized electrode configuration—ensures uniform field distribution and repeatable impedance matching across the 2425–2475 MHz bandwidth.
• Mechanically rugged stainless-steel housing with O-ring sealed flanges (per IEC 60154-1) and pressure-rated coolant ports (up to 6 bar) for compatibility with industrial cooling infrastructure.
• No moving parts or consumable elements; maintenance intervals exceed 20,000 operational hours under nominal conditions.

Sample Compatibility & Compliance

These water loads are compatible with all standard 2450 MHz microwave generators used in plasma processing, RF heating, material drying, and laboratory-scale microwave synthesis systems. They meet fundamental electromagnetic compatibility (EMC) requirements per CISPR 11 Group 2, Class A and support traceable power measurement protocols aligned with IEEE Std 1528–2013 (RF exposure assessment) and IEC 62209-2 (SAR testing). While not certified for medical device use per IEC 60601-2-57, they are routinely deployed in GLP-compliant R&D environments where source stability and load repeatability are critical to experimental validity. Flange dimensions and torque specifications conform to MIL-DTL-3922/67H and EIA RS-223-B standards.

Software & Data Management

As passive hardware components, the HY-W26FA and HY-W22FA do not incorporate embedded firmware or digital interfaces. However, they are fully interoperable with third-party power monitoring systems—including Bird 43 directional wattmeters, Keysight N1911A power analyzers, and LabVIEW-based data acquisition platforms—when integrated into calibrated test benches. For audit readiness in regulated environments (e.g., ISO/IEC 17025-accredited labs), users may document load-specific calibration certificates (traceable to NIM China), coolant flow rate logs, inlet/outlet temperature differentials, and VSWR verification records—all of which satisfy minimum requirements for equipment qualification under FDA 21 CFR Part 11 Annex 11 when maintained in controlled electronic records.

Applications

• Final-stage termination for microwave amplifier burn-in and life-cycle testing.
• Reference load in network analyzer (VNA) S-parameter calibration kits for WR-340/WR-430 bands.
• Safety-critical dummy load in microwave oven leakage testing and EMC pre-compliance screening.
• Power meter calibration anchor in national metrology institutes and university RF engineering laboratories.
• Stabilizing element in feedback-controlled microwave plasma ignition systems requiring consistent impedance anchoring.

FAQ

What is the maximum allowable coolant temperature rise across the load during continuous 10 kW operation?
Typical ΔT ranges from 8–12°C at 5 L/min flow rate; exact values depend on ambient temperature and heat exchanger efficiency—refer to the HY Thermal Derating Curve (Appendix B of Technical Manual Rev. 3.1).
Can these loads be operated in vertical orientation?
Yes—both models support omnidirectional mounting; however, vertical installation requires upward-facing inlet to prevent air entrapment in the water cavity.
Is deionized water conductivity specification defined in the manual?
Yes: resistivity ≥ 1.0 MΩ·cm at 25°C (equivalent to < 1 µS/cm); conductivity must be verified prior to initial fill and quarterly thereafter.
Do HY-W26FA/W22FA units include integrated temperature sensors?
No—temperature monitoring is external; recommended configurations include PT100 RTDs installed at inlet/outlet ports per IEC 60751 Class B.
Are flange gaskets supplied with the unit?
Yes—each unit ships with two fluorosilicone gaskets (ASTM D1418 Grade FVMQ) rated for -40°C to +200°C and compatible with deionized water service.