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17.7-21.2GHz Ka-band LNB
Ka-Band
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17.7-21.2GHz Ka-band LNB

17.7-21.2GHz Ka-band LNB

This Ka‑Band 17.7‑21.2 GHz LNB supports tri‑band and quad‑band reception with noise figure of 1.5‑1.6 dB and ±1 ppm internal LO stability, optional external reference available. Bands are switched by combination of voltage and 22KHz tone. With IP65 rating and coaxial power feed, it is applied to Ka‑band satellite receiving systems.

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    Product Detail

    This Ka‑Band 17.7‑21.2 GHz Low‑Noise Block (LNB) supports tri‑band and quad‑band configurations. Tri‑band covers 17.70‑18.70GHz, 18.45‑19.45GHz and 19.20‑20.20GHz, while quad‑band adds 20.20‑21.20GHz. The IF output is unified at 950‑1950 MHz. Noise figure is 1.5 dB for band 1‑3 and 1.6 dB for band 4. Internal LO stability is ±1 ppm with optional external reference. Maximum LO leakage is ‑40dBm at IF port and ‑60dBm at RF port. Conversion gain ranges 55‑65 dB, output P‑1dB is min.10 dBm (typ.15 dBm), delivering favorable phase‑noise, image rejection and spurious suppression.
    Power is supplied via coaxial cable at 12‑24 VDC with 5 W power consumption. Multi‑band switching is realized by combined logic of DC voltage and 22KHz tone. RF input adopts WR42 grooved waveguide and IF output is N‑type female. Measuring 120×60×26 mm and weighing 0.3 kg, it has IP65 waterproof rating. Operating from ‑40℃ to +60℃ under condensing humidity conditions, it is suitable for various Ka‑band satellite ground receiving terminals.

    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 Frequency

    950-1950 MHz

    Noise Figure

    1.5 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 Gain

    55 to 65 dB

    Output P-1dB

    10 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 Power

    12-24 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 Consumption

    5 W

    Input Interface

    WR42 (Grooved)

    Input VSWR

    2.0:1

    Output Interface

    N-type female

    Output VSWR

    2.0:1

    Size

    120*60*26mm

    Weight

    0.3kg

    Operating Temperature

    -40 to +60 ℃

    Humidity

    0-100% (condensing)

    Water-proof Class

    IP65

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