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Satcom LNB

Multi band Ka Band Satcom LNB 17.7‑21.2GHz LO Stability

ZD-LNB-17.7/21.2G
This robust Multi‑band Ka‑Band Satcom LNB covers 17.7‑21.2 GHz input frequency, supporting tri‑band and quad‑band working modes. It delivers ±1 ppm internal LO stability with optional external reference input, and adopts combined DC‑voltage and 22 KHz tone for band switching. The noise figure reaches 1.5‑1.6 dB across different bands, with 55‑65 dB conversion gain. Output P‑1dB is minimum 10 dBm (15 dBm typical), offering low phase‑noise and high linearity optimized for high‑order modulation and high‑data‑rate transmission. IP65‑rated, it reliably operates from ‑40℃ to +60℃ under condensing humidity. Powered by 12‑24 VDC via IF line with 5 W power draw, it features WR42‑grooved input and N‑type female output. Ideal for satellite gateway, maritime, SNG vehicle and fixed, portable, transportable VSAT terminals.
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Built for high‑rate professional satellite systems, this premium Ka‑Band unit is a high‑performance low noise block, one of the reliable Satcom LNB solutions for ground satellite stations. Supporting tri‑band and quad‑band operation across 17.7‑21.2 GHz, it uses combined DC‑voltage and 22 KHz tone signals to switch between different frequency bands. This Ka‑Band device features ±1 ppm internal LO stability, with optional external reference input for higher‑precision system requirements. Its noise figure ranges from 1.5 dB to 1.6 dB, paired with 55‑65 dB adjustable conversion gain. As a robust low noise block, it provides minimum 10 dBm output P‑1dB (15 dBm typical), low phase‑noise and optimized linearity for high‑order modulation and high‑speed data transmission. IP65‑rated, this Satcom LNB works steadily from ‑40℃ to +60℃ under 0‑100% condensing humidity. It runs on 12‑24 VDC IF power with 5 W power consumption, equipped with WR42 grooved input connector and N‑type female output. Widely deployed for satellite gateway, maritime, SNG vehicle, fixed, portable and transportable VSAT terminal applications.
 
Input Frequency (Tri-band)  

   LO: 16.75 GHz Band 1: 17.70-18.70 GHz;

   LO: 17.50 GHz Band 2: 18.45-19.45 GHz;

LO: 18.25 GHz Band 3: 19.20-20.20 GHz
Input Frequency (Quad-band)

   LO: 16.75 GHz Band 1: 17.70-18.70 GHz;

   LO: 17.50 GHz Band 2: 18.45-19.45 GHz;

   LO: 18.25 GHz Band 3: 19.20-20.20 GHz;

LO: 19.25 GHz Band 4: 20.20-21.20 GHz
Output Frequency950-1950 MHz
Noise Figure1.5 dB (RF at band 1, 2, 3); 1.6 dB (RF at band 4)
LO Stability

   Internal reference (+/- 1 ppm);

External reference (optional)
LO Leakage Level (IF connector)-40 dBm max.
LO Leakage Level (RF connector)-60 dBm max.
Conversion Gain55 to 65 dB
Output P-1dB10 dBm min. 15 dBm typ.
Phase Noise @1 KHz-75 dBc/Hz
Phase Noise @10 KHz-85 dBc/Hz
Phase Noise @100 KHz-95 dBc/Hz
Image Rejection

   40 dB @16.75 GHz,

20 dB @19.25 GHz
Output Spurious-50 dBc max.
Input Power12-24 VDC via IFL
Band Switched (Band 1)12-15 VDC & no Tone
Band Switched (Band 2)16-24 VDC & no Tone
Band Switched (Band 3)16-24 VDC & 22KHz Tone
Band Switched (Band 4)12-15 VDC & 22KHz Tone
Power Consumption5 W
Input InterfaceWR42 (Grooved)
Input VSWR2.0:1
Output InterfaceN-type female
Output VSWR2.0:1
Size20*60*26mm
Weight0.3kg
Operating Temperature-40to +60
Humidity0-100% (condensing)
Water-proof ClassIP65