Microwave Ferrite Technology, Inc.
Microwave Ferrite Technology, Inc. is a leading manufacturer of microwave ferrite materials for the wireless industry in China. We provide a wide range of products, from high-volume garnets for wireless infrastructure to specialized materials for radar applications.
Applications
Our materials are designed for:
- Above-resonance devices (100 MHz to ~3 GHz)
- Below-resonance devices (1 GHz to 40 GHz or higher)
- High-power and phase-shifting applications
Our Ferrites & Magnetic Materials
We offer a diverse range of advanced ferrite and magnetic materials, including:
- Narrow Linewidth Ferrites: Optimized for high-frequency applications with minimal resonance absorption.
- Aluminum & Aluminum-Gadolinium Substituted Garnets: Enhanced thermal stability for specialized microwave systems.
- Gadolinium-Substituted Garnets: Superior magnetic properties for advanced signal processing.
- Cobalt & Holmium-Doped Garnets: Performance-boosting materials for high-power microwave applications.
- Magnesium Spinels: Low-loss materials ideal for reduced magnetic interference in devices.
- Nickel Spinels: High magnetization and excellent thermal stability.
- Lithium Spinels: Ideal for discrete phase shifters with wide saturation magnetization properties.
- Permanent Magnets: Including ferrite and rare-earth magnets for industrial and scientific applications.
Key Characteristics
Our ferrites are engineered for high-frequency performance:
- High specific electrical resistivity (ρ > 10⁶ Ω·cm), ensuring low dielectric losses (tgδε: 10⁻² to 10⁴).
- Dielectric permittivity (ε’ ≈ 10–15).
- Excellent thermal stability across a wide temperature range.
- High activity with minimal bias for optimal nominal parameters.
- Saturation magnetization (4πMs: 400–5000 G).
- Narrow resonance linewidth (2ΔH: 0.3–0.5 Oe for yttrium-iron monocrystals; 3–1000 Oe for polycrystalline ferrites).
Configurations
Our microwave ferrites and ceramics are available in various shapes and compositions, with precision manufacturing to meet custom requirements.
| Shape |
Dimensions |
Details |
| Disc |
Diameter: 1–100 mm |
Suitable for compact microwave components. |
| Plate |
Max: 50.8 x 50.8 mm |
Thickness: 0.5–3 mm, ideal for planar devices. |
| Triangle |
Max Diameter: 50 mm |
Used in specialized microwave applications. |
| Rod |
Max Length: 200 mm |
Designed for elongated magnetic components. |
| Composition |
Ferrites & Dielectric Materials |
Custom compositions available per request. |
| Precision |
Tolerance: ±0.02 mm |
Custom sizes and drawings supported. |
Microwave Ferrite Materials
- Yttrium Iron Garnets (YIG):
- Ideal for high-frequency devices in the lower microwave band.
- Features: Narrow ferromagnetic resonance linewidth, low magnetic losses, high magnetization, and excellent thermal stability.
- Enhanced with Cobalt or Rare-earth ions (Dy, Gd) for improved power stability.
- Spinel-Based Materials:
- Magnesium Spinels: Low coercive field strength, minimal magnetic and dielectric losses, suitable for non-resonance applications.
- Nickel Spinels: Wide magnetization range, high thermal stability, ideal for resonance applications.
- Lithium Spinels: Used in discrete phase shifters, offering low coercive field strength and a wide range of saturation magnetization.
Microwave Ferrite Material Specifications
The table below provides detailed specifications for our microwave ferrite materials, categorized by series. All materials are engineered for high-frequency applications with low losses and excellent thermal stability.
Parameter Definitions
- Density (g/cm³): Material density.
- 4πMs (Gauss): Saturation magnetization with ±5% tolerance.
- ε' ±5%: Dielectric permittivity with ±5% tolerance.
- tgδε: Dielectric loss tangent, indicating low dielectric losses.
- ΔH (Oe): Ferromagnetic resonance linewidth, a key indicator of material performance in high-frequency bands.
- ΔHk (Oe): Anisotropy field linewidth, affecting material stability.
- Tc (°C): Curie temperature, indicating the temperature stability range.
Material Series
- Li Ferrite Series: Low magnetic and dielectric losses, high temperature stability, high dielectric coefficient.
- Ni Ferrite Series: Excellent temperature stability, small ferromagnetic resonance linewidth, low dielectric loss.
- Ni Ferrite High-Power Series: Low losses, high surface density, excellent temperature stability.
- General Garnet Series: Low losses, good temperature stability, excellent compatibility.
- Narrow Linewidth Garnet Series: Small resonance linewidth, high stability, excellent surface quality.
- High-Power & Low-Temperature Coefficient Garnet Series: Low losses, high peak power tolerance, temperature stability.
- Microwave High-Q Ferrite Resonator Series: Small resonance linewidth, high-frequency performance, low temperature coefficient (<50 Hz/°C), stable properties.
Advantages
- Quality Assurance: Our expert quality control team ensures each ferrite meets stringent standards.
- Versatility: Available in disc, triangular, or custom formats for isolators and circulators across radio-communication frequencies.
- Miniaturization: Ferrite-dielectric composites enable compact isolator/circulator designs with low deltaH (ΔH) for reduced IMD.
Surface Treatment
Protective coatings include Ni-Cu-Ni, Zn, Au, Ag, Sn, Ti, TiN, Cr, and custom options per customer requirements.
Maintenance Guidelines
To maintain magnetic performance and prevent rusting, avoid exposure to:
- Acid or alkali liquids
- Organic solvents, electrolytes, water, or oil
- Hydrogen, chlorine, ammonia, or oxynitride gases
- Radiation or radioactive rays
Applications by Sector
- Garnet & Spinel Ferrites: Space, Defense, Telecommunications
- Ferrite-Dielectric Assemblies: Telecommunications
For more information, please reach out:
Microwave Ferrite Technology, Inc.
