Chenzhou Seton Technology Co., Ltd
| Payment Terms | T/T,Western Union |
| Supply Ability | 15 million pieces |
| Delivery Time | 30-35 days |
| Packaging Details | CARTON |
| Input Frequency Range (Low-Band) | 10.7 ~ 11.7 GHz |
| Input Frequency Range (High-Band) | 11.7 ~ 12.75GHz |
| Output Frequency Range (Low-Band) | 950 ~ 1950 MHz |
| Output Frequency Range (High-Band) | 1100 ~ 2150MHz |
| Low band LO frequency | 9.75GHz |
| High band LO frequency | 10.6GHz |
| Noise figure | 0.7dB (Typ.)/ 1.0dB(Max.) |
| Conversion Gain | 55dB~65dB/ 60dB (Typ.) |
| Brand Name | SETON |
| Model Number | ST-K21WA |
| Certification | CE, ISO, ROHS, POP, REACH |
| Place of Origin | CHINA |
View Detail Information
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Product Specification
| Payment Terms | T/T,Western Union | Supply Ability | 15 million pieces |
| Delivery Time | 30-35 days | Packaging Details | CARTON |
| Input Frequency Range (Low-Band) | 10.7 ~ 11.7 GHz | Input Frequency Range (High-Band) | 11.7 ~ 12.75GHz |
| Output Frequency Range (Low-Band) | 950 ~ 1950 MHz | Output Frequency Range (High-Band) | 1100 ~ 2150MHz |
| Low band LO frequency | 9.75GHz | High band LO frequency | 10.6GHz |
| Noise figure | 0.7dB (Typ.)/ 1.0dB(Max.) | Conversion Gain | 55dB~65dB/ 60dB (Typ.) |
| Brand Name | SETON | Model Number | ST-K21WA |
| Certification | CE, ISO, ROHS, POP, REACH | Place of Origin | CHINA |
Ultra-Low Noise · Full Band Coverage · Universal Compatibility
Model: ST-K21WA
Engineered for High-Performance Satellite Signal Reception and Downconversion
Ku-band is the mainstream frequency band for satellite TV, broadband access, and communication links. The Ku-Band Universal Single LNBF (Model ST-K21WA) covers the full 10.7~12.75GHz input frequency range with dual built-in local oscillators (9.75/10.6GHz), enabling automatic switching between low-band and high-band for complete spectrum reception.
Key Advantages:
One LNB covers the entire Ku-band. Ultra-low noise delivers consistently clear pictures.
| Full Band Coverage |
Input Frequency: 10.7~12.75 GHz Low-Band: 10.7~11.7 GHz High-Band: 11.7~12.75 GHz One LNBF for the entire Ku-band |
| Ultra-Low Noise |
Noise Figure: 0.7dB (Typ.) / 1.0dB (Max.) Easily captures weak signals Ensures excellent Carrier-to-Noise ratio (C/N) |
| High & Stable Gain |
Conversion Gain: 60dB (Typ.) Gain Flatness: ≤3.0dB Gain Variation: ≤0.5dB/26MHz |
| Precise Local Oscillator |
LO Frequencies: 9.75 / 10.6 GHz Initial Accuracy: ±0.5 MHz Temperature Drift: ±0.75 MHz (-30~+60℃) |
| Universal Control |
Vertical Polarization: 10.0~14.0V Horizontal Polarization: 16.0~20.0V Band Switching: 22±4KHz |
| Standard Output |
Output Frequency: 950~2150 MHz Output Impedance: 75Ω (F-type connector) Plug-and-play, compatible with all major receivers |
| Parameter | Specification |
|---|---|
| Input Frequency Range (Low-Band) | 10.7GHz ~ 11.7GHz |
| Output Frequency Range (Low-Band) | 950MHz ~ 1950MHz |
| Low band LO frequency | 9.75 GHz |
| Input Frequency Range (High-Band) | 11.7GHz ~ 12.75GHz |
| Output Frequency Range (High-Band) | 1100MHz ~ 2150 MHz |
| High band LO frequency | 10.6GHz |
| Noise figure | 0.7dB (Typ.)/ 1.0dB(Max.) |
| LO Initial Accuracy | 0.5MHz |
| LO Temperature Drift (-30~+60℃) | 0.75MHz |
| LO phase noise @ 1 KHz | -75dBc/Hz |
| LO phase noise @ 10 KHz | -80dBc/Hz |
| LO phase noise @ 100 KHz | -90dBc/Hz |
| Conversion Gain | 55dB~65dB/ 60dB (Typ.) |
| Gain Flatness | 3.0dB (Max.) |
| Gain Variation | 0.5dB/26MHz |
| O/P 1dB Compression Point (P1 dB) | 0.0dBm (Min.) |
| Image-Rejection | -40dBc (Min.) |
| Crosstalk Isolation | 20dB (Min.) |
| O/P VSWR | 2.5:1 |
| Control Signals Ca V | 10.0V~14.0V |
| Control Signals Cb H | 16.0V~20.0V |
| Control Signals Cc | 22±4KHz |
| DC-Power | 10~20V/100Vdc*mA (Max.) |
| Output Impedance | 75Ω (F-Type) |
| Working Temperature | -30℃~+60 ℃ |
| Challenge | How This LNB Solves It |
|---|---|
| Weak signals in remote areas cause poor picture quality |
Ultra-low noise figure (0.7dB Typ.) easily captures weak signals, ensuring clear picture quality. |
| Extreme outdoor temperatures cause LO drift and signal loss |
Wide temperature design (-30℃~+60℃) with only ±0.75MHz drift – stable lock in heat or cold. |
| Signal crosstalk between adjacent satellites or polarizations |
≥20dB cross-polarization isolation ensures vertical and horizontal signals do not interfere with each other. |
| Insufficient or fluctuating gain during multi-satellite reception |
60dB typical gain with ≤3.0dB flatness – consistent and reliable signal strength. |
| Incompatibility with different receiver control protocols |
Supports 13/18V polarization switching and 22KHz band control – compatible with the vast majority of satellite receivers on the market. |
Home Satellite TV – Ideal for Ku-band satellite television reception Hotel / Apartment Multi-Room Distribution – Front-end LNB for distribution systems VSAT Broadband Access – Key receiving component for satellite internet terminals Vehicle / Marine Mobile Reception – Satellite signal reception for RVs, boats, and mobile platforms Remote Monitoring & Data Transmission – Data backhaul for remote sites, oil & gas fields, and rural connectivityQ: What is a "Universal" Ku-band LNB?
A: Universal means a single LNB covers the entire Ku-band (10.7~12.75GHz). It automatically switches between low-band (9.75GHz LO) and high-band (10.6GHz LO) using the 22KHz control signal – no hardware changes required.
Q: What is the real-world benefit of the 0.7dB noise figure?
A: Lower noise figure means the LNB generates less self-noise. With 0.7dB Typ. , you get clear, pixelation-free pictures even in weak signal environments – such as remote areas, light rain fade, or when using smaller dish antennas.
Q: Why is LO temperature drift important?
A: LNBs are installed outdoors and experience summer heat and winter cold. ±0.75MHz drift ensures the LO frequency remains stable from -30℃ to +60℃ – your demodulator will not lose lock due to temperature changes.
Q: What control signals does this LNB support?
A: Supports three standard control methods:
- Polarization Switching: Vertical (10~14V) / Horizontal (16~20V)
- Band Switching: 22±4KHz (no 22KHz = low-band, 22KHz = high-band)
Q: What is the output frequency range?
A: Low-band output: 950~1950MHz; High-band output: 1100~2150MHz. All outputs are within the L-band range and compatible with all major satellite receivers.
Company Details
Year Established:
2019
Employee Number:
100~200
Ecer Certification：
Verified Supplier
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