射频下变频器 3400–3600MHz

Customer Specification Request:

频率范围 (射频) 3400..3600 兆赫
Maximum input power 1 兆瓦 (0dBm的)
频率范围 (如果) 400..600 兆赫
Noise figure @ 18 °C typ. 1.0 D b
Gain @ 25 摄氏度 40 D b
Gain flatness 1.50 D b
Image rejection typ. 47 D b
LO frequency 3000 兆赫
LO accuracy @ 18 摄氏度 +/- 20 千赫
LO frequency stability +/- 20 千赫
Phase noise @ 100 千赫 -112 分贝/赫兹
LO leakage to IF port typ. -58 dBm的
LO leakage to RF port typ. -52 dBm的
电源电压 +9 … +18 直流电压
Current consumption typ. 180 嘛
Operating case temperature range -20 … +55 摄氏度
Input connector / impedance N-female, 50 欧姆
Output connector / impedance N-female, 50 欧姆
Case milled Aluminium, water resistant
外形尺寸 (毫米) 82 X 64 X 22
重量 230 G

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Analysis of Customer Requirements

This set of parameters clearly describes a C-band to UHF-band frequency down converter, typically used in RF communication, 遥测, or COFDM video transmission systems. Let’s break down what the customer is looking for and what this specification implies for practical applications.

1. Frequency Conversion Purpose:
   The input range of 3400–3600 MHz (射频) and output range of 400–600 MHz (如果) indicates a fixed Local Oscillator (LO) 在 3000 兆赫. This means the converter shifts C-band signals down to a lower IF band, making them compatible with standard COFDM demodulators or SDR receivers.
2. Low Noise Design:
   一种 1.0 dB noise figure is exceptional, ensuring minimal signal degradation — crucial for long-range links or weak-signal reception in surveillance, 无人机, or broadcast systems.
3. Stable Gain and Flatness:
   和 40 dB gain and only 1.5 dB flatness, the unit ensures consistent performance across the operating band. This helps maintain a reliable signal-to-noise ratio and simplifies subsequent amplification or demodulation stages.
4. High Image Rejection:
   这 47 dB image rejection level demonstrates well-designed filtering, which prevents unwanted mirror frequencies from distorting the IF output — a key advantage in narrowband digital systems.
5. Excellent LO Stability and Phase Noise:
   这 ±20 kHz frequency stability 和 -112 dBc/Hz phase noise at 100 kHz offset show this converter is suitable for modern digital modulation schemes, 包括 COFDM, QPSK, or QAM, where phase noise directly impacts bit error rates.
6. Robust and Practical Design:
   这 milled aluminum, water-resistant housing and wide -20 to +55°C operating range make this converter suitable for field deployment, including mobile command stations, UAV ground control, and outdoor repeater systems.
7. Power and Interface:
   配套 9–18 VDC power input and typical 180 嘛 current draw, it’s compatible with common field power systems. 这 N-type 50Ω connectors ensure solid RF performance with minimal signal loss.

应用

• Long-range COFDM video receiver front-end
• UAV and drone ground control stations
• Wireless surveillance and telemetry
• C-band communication link monitoring
• Military and emergency communication systems

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结论

This specification suggests the customer needs a precision-engineered, low-noise RF down converter 为了 C-band signal reception. It’s ideal for integration into COFDM receiver systems, broadband communication links, or UAV downlink setups where high sensitivity and stability are critical.

Such converters are often paired with high-performance COFDM demodulator modules to provide a complete long-range video or telemetry solution.

常问问题