In the fields of RF communication, radar systems, and industrial measurement & control, isolators serve as pivotal components for blocking reverse power and protecting core devices. Their structural design and performance stability directly govern the operational lifetime and maintenance costs of the system. The UIYCDI12075A148T158NFP150 Dual Junction Coaxial Isolator is specially designed for high-power applications within the 148-158MHz medium-low frequency spectrum. Through the adoption of an innovative dual-junction ferrite series structure, it breaks through the performance bottlenecks of traditional single-junction isolators, realizing three-dimensional upgrades in isolation level, power handling capacity, and environmental adaptability. This product provides RF engineers and system integrators with a professional solution that combines technical sophistication and engineering feasibility.
Limited to merely 30-45 dB isolation by structural constraints, conventional single-junction isolators have obvious performance drawbacks, while this product adopts dual-junction ferrite synergistic attenuation design to achieve isolation over 70 dB at +25°C, which can effectively block high-power impacts resulting from antenna reflection and load mismatch and protect premium devices including GaN power amplifiers and signal sources from damage caused by reverse power; benefiting from precise magnetization technology of high-permeability ferrite materials and accurate 50Ω characteristic impedance matching, it realizes insertion loss lower than 1.0 dB and VSWR less than 1.2, fully ensuring intact and stable signal transmission performance.
Core Product Advantages
| Parameter | Specification |
| Model Number | UIYCDI12075A148T158NFP150 |
| Frequency Range | 148 ~ 158MHz |
| Power Handling | Forward 150W / Reverse 100W |
| Electrical Performance |
Operating at +25℃：IL <1.0dB, ISO >70dB, VSWR <1.20 Operating at +55℃：IL <1.0dB, ISO >52dB, VSWR <1.25 Operating at -25℃：IL <1.0dB, ISO >42dB, VSWR <1.25 |
| Connector Type | N Female |
| Dimensions (L×W×H) | 120×75×28mm |
| Compliance & Reliability | Compliant with RoHS, REACH, and ISO 9001 certifications, with complete test data provided. |
Product photos/technical drawings
Application Scenarios
- High-Power Emergency Communication Base Stations: Designed for 148-158MHz emergency communication band, it is installed between antenna feeder systems and power amplifiers. The ultra-high 70dB isolation suppresses reflected power, satisfying the reliability demand for 72-hour continuous operation of emergency communication systems.
- Electronic Countermeasure and Radar Systems: Acting as the core isolation component for transceiving links, it eliminates crosstalk from interference signals to secure receiver sensitivity. With superior wide-temperature stability, it perfectly fits vehicle-mounted, airborne and other mobile operation scenarios.
- Marine Navigation Communication Equipment: Equipped with a sealed N Female connector, its salt spray corrosion resistance complies with IMO maritime certification standards. It guarantees stable navigation signal transmission in high-temperature and high-humidity marine environments, avoiding navigation deviations caused by isolation failure.
- Industrial RF Measurement and Control Systems: Applied in high-frequency heating, wireless sensor networks, and other scenarios, its low insertion loss characteristic minimizes signal energy waste, while the high isolation suppresses power grid interference and load fluctuations, significantly improving the accuracy of measurement and control data.
- RF Test Instrument Accessories: Functioning as an isolation protection component between signal sources and devices under test (DUTs), it prevents test instruments from being damaged by reverse power due to load mismatch, ensuring the continuous and stable operation of test work.
Conclusion
The UIYCDI12075A148T158NFP150 dual-junction coaxial isolator features ultra-high isolation of 70dB, 150W high power handling capacity and excellent wide-temperature stability, making it a benchmark isolator for the 148-158MHz frequency band. Its dual-junction structure breaks through the performance limitations of traditional single-junction products while avoiding the high cost and insufficient power bearing defects of topological isolators, striking an ideal balance between cost efficiency and practical performance. Ideal for RF engineers and purchasers pursuing high reliability and low maintenance costs, this product meets stringent application requirements in industrial, military, communication and other fields, and simplifies system integration via standardized design, serving as the preferred isolation solution for high-power RF systems.