Manufacturer of Micro High-Frequency RF Circulators and Isolators

　　1. Domestic Manufacturer (China)

　　1.1 China Electronics Technology Group Corporation, Ninth Research Institute

　　Technical Positioning: Leading domestic aerospace-grade RF device manufacturer, with over 60 years of experience in R&D of spaceborne isolators and circulators, achieving complete independent control of the entire supply chain from materials, design, and manufacturing. Core Products and Specifications:

　　Frequency Range: Ku-band (12–18 GHz), Ka-band (26.5–40 GHz), W-band (75–110 GHz)

　　Miniaturization: Ka-band chip-scale models (5mm × 5mm × 2mm, weight ≤3.8g), meeting SIW design requirements

　　Key Specifications: Insertion Loss ≤0.4dB (Ka-band), Isolation ≥35dB, TID Immunity ≥300 krad (Si)

　　Typical Applications: Shenzhou 20 manned spacecraft, Chang'e 4 lunar rover, GEO/LEO satellite communication systems, ensuring reliable ground-to-ground communications in extreme environments. 1.2 Tianhe Defense (Huayang Communications/Biotronics)

　　Technical Positioning: Leveraging the military technology strengths of its parent company, Tianhe Defense, the company has built a complete "materials-devices-modules" industry chain, focusing on high-frequency miniaturized devices. Core Products and Specifications: Frequency Range: Ku-band to V-band (12-75 GHz); Miniaturization: High-dielectric-constant microwave materials enable a 70% reduction in size compared to traditional designs; Key Specifications: Insertion loss ≤ 0.5 dB (Ka-band), temperature stability ±0.08 dB (-60°C to 150°C); Typical Applications: Phased array radar, shipborne communications systems, and commercial satellite payloads. Biotronics' gyromagnetic ferrite materials hold over 70% of the global market share. 1.3 Chengdu Innoda Microwave

　　Technical Positioning: A high-frequency integrated device expert, with W-band technology breakthroughs as its core competitiveness. Core Products & Parameters: Frequency Range: W-Band (71-110 GHz) Miniaturization: Utilizes a vertically interconnected integrated feedforward module (40% smaller than discrete solutions) Key Specifications: Isolation ≥ 32 dB, Thermal Resistance ≤ 5°C/W (AlN substrate) Typical Applications: Millimeter-Wave radar, 6G test satellites, and submillimeter-wave communication links. II. International Manufacturers 2.1 Qorvo Technology Positioning: A global leader in RF semiconductors and a benchmark for high-frequency satellite communication device technology. Core Products & Parameters:

　　Frequency Range: Ku-Band to E-Band (12–75 GHz)

　　Miniaturization: Chip-Scale Isolators Based on SIW Technology (4mm × 4mm × 1.2mm)

　　Key Specifications: Insertion Loss ≤ 0.35 dB (Ku-Band), Isolation ≥ 36 dB, Mean Time Between Failures (MTBF) ≥ 1 × 10⁶ hours

　　Typical Applications: Starlink low-Earth Orbit satellite constellation, Intelsat high-temperature superconducting satellites, and military anti-jam systems. 2.2 Murata Manufacturing Co., Ltd.

　　Technology Positioning: A global leader in miniaturized passive components, achieving breakthrough performance through ceramic integration technology. Core Products and Specifications:

　　Frequency Range: Ku-band to Ka-band (12-40 GHz)

　　Miniaturization: Multilayer ceramic circulator (8mm × 8mm × 2.5mm) with embedded magnetics

　　Key Specifications: Insertion Loss ≤ 0.4dB (Ka-band), Outgassing Rate ≤ 1×10⁻⁸ Pa·m³/s (ASTM E595)

　　Typical Applications: Civilian VSAT terminals, low-Earth orbit broadband satellites, and automotive radar.

　　2.3 Cobham Satellite Communications

　　Technology Positioning: A long-established manufacturer of aerospace-grade components and a global leader in radiation-hardened technology. Core Products and Parameters: Frequency Range: C-Band to V-Band (4–75 GHz)

　　Miniaturization: Modular design (10mm × 8mm × 3mm) for transponder integration

　　Key Specifications: TID impedance ≥ 500 krad (Si), insertion loss stability ±0.1 dB (15-year service life)

　　Typical Applications: GPS III satellites, military secure communications payloads

　　3. Emerging Specialized Suppliers

　　3.1 Sidi Microelectronics

　　Technology Positioning: An innovator in millimeter-wave integrated solutions, focusing on integrated SoC and antenna design. Core Products and Parameters:

　　Frequency Range: 24 GHz, Ka-Band (26.5–40 GHz)

　　Miniaturization: 4mm × 4mm radar SoC with integrated isolator functionality

　　Key Specifications: Insertion loss ≤ 0.6 dB, power consumption ≤ 100 mW

　　Typical Applications: Low Earth Orbit (LEO) satellite IoT payloads, drone communication systems

　　3.2 Canqin Technology

　　Technology Positioning: A core supplier of satellite RF components, with leading high-frequency dielectric device technology. Core Products and Specifications:

　　Frequency Range: Ku-Band to W-Band (12-110 GHz)

　　Miniaturization: Thin-Film Ceramic Circulator (Thickness ≤ 2 mm)

　　Key Specifications: Return Loss ≥ 18 dB, Temperature Drift ≤ ±5 ppm/°C

　　Typical Applications: Commercial Space Satellite Payloads, Ground Station Receiver Systems.

　　4. Application Scenario Selection Guide

　　4.1 Geostationary High-Temperature Superconducting Satellites

　　Recommended Manufacturer: China Electronics Technology Group Corporation (CETC) Cobham Branch

　　Key Selection Criteria: TID Immunity ≥ 300 krad(Si) (meets the 15-year geostationary satellite lifecycle), stable insertion loss (±0.1 dB over the service life), and transport layer compatibility.

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