بازفرستنده بازپخش تکرارکننده cofdm با 1x TX 2 تنوع RX برای برد گسترده و دور زدن مانع

بازفرستنده بازپخش تکرارکننده cofdm با 1x TX 2 تنوع RX برای برد گسترده و دور زدن مانع

Customized COFDM Repeater System (1TX / 2RX Diversity)

این custom-built COFDM repeater is specifically engineered to match the customer’s existing transmitter and receiver configuration, ensuring seamless signal relay, extended coverage, and reliable non-line-of-sight (NLOS) ارتباط.

معماری سیستم

Input Signal Reception (1st link Side)

• Compatible with customer’s transmitter operating at 915 مگاهرتز (902– باند ISM 928 مگاهرتز)

• مجهز به دوگانه 915 MHz receiving antennas

• پشتیبانی 2× RX diversity reception for improved signal stability and anti-multipath performance

Frequency Conversion Module

• یکپارچه RF BDC (Block Downconverter)

• Converts incoming signal from 915 مگاهرتز به 700 باند مگاهرتز

• Enhances frequency flexibility and reduces interference

Re-Transmission (2nd link Side)

• Re-transmits signal using a 550 MHz antenna system

• Ground receiver uses دوگانه 550 MHz receiving antennas

• Maintains diversity reception on the receiving end for maximum link reliability

ویژگی های کلیدی

• ✔ Fully customized to match customer’s TX/RX frequency plan

• ✔ 1× TX / 2× RX diversity repeater architecture

• ✔ Built-in RF Block Downconverter (915 مگاهرتز → 700 مگاهرتز)

• ✔ Optimized for long-distance transmission

• ✔ Strong NLOS (غیر خط از دید) عمل

• ✔ Supports obstacle penetration and extended coverage

• ✔ Configurable RF output power: 2W / 5W / 10W (قابل تنظیم)

برنامه های معمولی

• Tactical communication systems

• UAV/drone signal relay

• انتقال ویدئو با برد بلند

• Urban obstacle bypass deployment

• Temporary communication extension stations

ابعاد: کمتر از 200 × 150 × 40 میلی متر (excluding protruding connectors)
وزن: تقریبا 900 g – 1 کیلوگرم

Bandpass RF filter

RF Filtering Considerations

Since the system operates with two independent wireless links, even though the operating frequencies are separated, additional RF filtering is recommended to ensure optimal performance.

To minimize potential interference, unwanted out-of-band signals, or second-harmonic emissions, it is advisable to install an external فیلتر میان گذر (BPF) between the antenna and the receiver RF connector.

Band-Pass Filter Design & نصب و راه اندازی

• The band-pass filter is typically implemented as a separate external unit, rather than being integrated inside the repeater.

• This modular design allows:

  • Easy replacement or frequency customization

  • Flexible deployment based on field conditions

  • Convenient maintenance and upgrades

If the RF environment is clean and signal quality is stable, the filter can remain as a backup component and does not need to be connected.

مشخصات فنی

• Passive device (no power supply required)

• No signal directionality (bidirectional installation supported)

• Simple inline installation between antenna and RF input

• Improves system immunity against interference and harmonics