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产品说明
GARDINER GKA435445G Q 波段双频段 LNB
产品概述型号：GKA435445G 产品类型：Q 波段双通道低噪声下变频器（LNB） 核心特性：双射频输入分段、正谱变频、双频段同步中频输出、内外10MHz参考源自适应、高增益、低噪声、宽电压供电 低相位噪声、低噪声系数 标准中频输出频率 监控与控制接口 自动温度增益补偿。 适用于Q波段卫星地面站、射频测试、毫米波接收系统。 产品核心特点
性能指标
外参考模式（优先）?同轴中频接口输入 10MHz、幅度≥ 5dBm 正弦参考信号，LNB 自动识别并锁定外部 10MHz 时钟，本振频率稳定度跟随系统参考，适合高精度同步地面站、射频测试系统。
1.1?五、接口定义
1.2?六、典型应用场景
GKA435445G Q-Band Dual-Channel Low Noise Block Downconverter (LNB)? 1. Product Description??GKA435445G?is a high-performance Q-Band Dual-Channel Low Noise Block Downconverter (LNB) designed for advanced satellite communication and millimeter-wave measurement systems. It integrates two independent receive channels covering the full 43.5–45.5 GHz spectrum, down-converting them simultaneously to a standard 1.66–2.66 GHz IF output. Featuring a positive frequency conversion architecture, auto-sensing internal/external reference switching, and an industrial-grade wide-temperature design, this unit offers exceptional sensitivity (Noise Temp ≤ 500K) and high gain (≥ 60 dB). It is housed in a compact, shielded aluminum cavity, making it ideal for both fixed ground stations and portable terminals. 1.3?2. Key Features?Dual Segment Coverage:? Simultaneous reception of 43.5–44.5 GHz and 44.5–45.5 GHz. Positive Spectrum Output:? RF frequencies map directly to IF frequencies (1.66–2.66 GHz). High Gain & Low Noise:? ≥ 60 dB conversion gain with a maximum noise temperature of 500 K. Smart Reference Switching:? Automatically detects external 10MHz reference (≥ 5 dBm); falls back to internal OCXO if absent. Wide Voltage Input:? Supports 12 VDC to 18 VDC via the IF coaxial cable (PoE capable). Superior Stability:? Gain flatness ≤ 2.0 dB p-p; operating temperature range -40°C to 75°C. Standard Interfaces:? BJ400 (WR22) waveguide input and N-Type (50Ω) IF output. 1.4?3. Technical Specifications?1.4.1?3.1 Electrical Performance?
1.4.2?3.2 Reference Clock & Power?
1.4.3?3.3 Environmental & Mechanical?
1.5?4. Functional Description?1.5.1?4.1 Reference Clock Logic?The GKA435445G features a seamless reference clock management system: External Priority:? Upon power-up, the unit monitors the IF port for a 10MHz signal. If a valid signal (≥ 5 dBm) is detected, the unit locks to the external reference immediately. Internal Fallback:? If no external signal is present, the unit automatically switches to the internal high-stability oven-controlled crystal oscillator (OCXO) to ensure continuous operation. Real-time Detection:? The unit continuously monitors the reference signal during operation. 1.5.2?4.2 Power Supply?The device utilizes a single DC power input through the IF output connector. A regulated 12V to 18V DC source is required. 1.6?5. Application Scenarios?Q-Band VSAT Ground Stations:? High-throughput satellite communications. Radio Astronomy & Remote Sensing:? Reception of weak cosmic microwave signals. Millimeter-Wave Test Systems:? Front-end downconversion for spectrum analyzers. 5G/6G Backhaul:? Point-to-point high-frequency link receivers. Portable Terminals:? Compact and robust design suitable for field deployment. 1.7?6. Outline Drawing & Interface Definition?(Note: Insert mechanical drawing here) RF Input Port:? BJ400 (WR22) Rectangular Waveguide Flange. IF Output Port:? N-Type Female (50Ω). Functions as: Signal Output:? 1.66–2.66 GHz IF. DC Input:? 12V to 18V Power. Ref Input:? 10 MHz External Clock. 1.8?7. Ordering Information?
Company Name??Shenzhen Guoxin Sichen Technology Co., Ltd. TEl: 86 15986663916 |
