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18.2-21.7GHz Ka-band LNB Low Noise Block
Ka-Band
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18.2-21.7GHz Ka-band LNB Low Noise Block

18.2-21.7GHz Ka-band LNB Low Noise Block

This Ka‑Band 18.2‑21.7 GHz LNB supports single‑band and multiple dual‑band modes, with noise figure of 1.5‑1.6 dB and ±1 ppm internal LO stability, optional external reference available. Bands are switched by DC voltage. Featuring IP65 protection and coaxial power feed, it is suitable for various Ka‑band satellite receiving systems.

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    Product Detail

    This Ka‑Band 18.2‑21.7 GHz Low‑Noise Block (LNB) supports single‑band and multiple dual‑band configurations. Single‑band covers 18.20‑19.20GHz, 19.20‑20.20GHz and 20.20‑21.20GHz. Three optional dual‑band options are available for diverse Ka‑band RF reception with unified IF output of 950‑1950 MHz. Noise figure is 1.5 dB for band 1,2,4,6 and 1.6 dB for band 3,5. Internal LO stability reaches ±1 ppm with optional external reference. Maximum LO leakage is ‑40dBm at IF port and ‑60dBm at RF port. Conversion gain ranges from 55‑65 dB, output P‑1dB is minimum 10 dBm (typical 15 dBm), with good performance on phase noise, image rejection and spurious suppression.
    Power is supplied via coaxial cable with 5 W power consumption. For dual‑band mode, high/low band switching is controlled by +13VDC / +18VDC DC voltage. RF input uses WR42 grooved waveguide and IF output is N‑type female. Measuring 88×56×25 mm and weighing 0.46 kg, it is rated IP65 waterproof. Operating from ‑40℃ to +60℃ under condensing humidity conditions, it is widely applied in Ka‑band satellite ground receiving terminals.

    Input Frequency (Single-band)

    LO: 17.25 GHz Band 1: 18.20-19.20 GHz;

    LO: 18.25 GHz Band 2: 19.20-20.20 GHz;

    LO: 19.25 GHz Band 3: 20.20-21.20 GHz

    Input Frequency (Dual-band)

    LO: 17.25/18.25 GHz Band 4: 18.20-19.20 & 19.20-20.20 GHz;

    LO: 18.25/19.25 GHz Band 5: 19.20-20.20 & 20.20-21.20 GHz;

    LO: 16.85/18.05 GHz Band 6:17.80-19.00 & 19.00-20.20 GHz

    Output Frequency

    950-1950 MHz

    Noise Figure

    1.5 dB (RF at band 1, 2, 4,6); 1.6 dB (RF at band 3,5)

    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 Gain

    55 to 65 dB

    Output P-1dB

    10 dBm min. 15 dBm typ.

    Phase Noise @1 KHz

    -73 dBc/Hz

    Phase Noise @10 KHz

    -83 dBc/Hz

    Phase Noise @100 KHz

    -93 dBc/Hz

    Image Rejection

    30 dBc min.

    Output Spurious

    -50 dBc max.

    Input Power(Single-Band)

    12-24 VDC via IFL connector

    Input Power (Dual-band)

    L-band +13 VDC：12-15 VDC via IFL connector

    H-band +18 VDC：16-24 VDC via IFL connector

    Power Consumption

    5 W

    Input Interface

    WR42 (Grooved)

    Input VSWR

    2.5:1

    Output Interface

    N-type female

    Output VSWR

    2.0:1

    Size

    88*56*25mm

    Weight

    0.46kg

    Operating Temperature

    -40 to +60 ℃

    Humidity

    0-100% (condensing)

    Water-proof Class

    IP65

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