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18.2-21.2GHz Ka-band LNB
Ka-Band
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18.2-21.2GHz Ka-band LNB

18.2-21.2GHz Ka-band LNB

This Ka‑Band 18.2‑21.2 GHz LNB supports single‑band and dual‑band operation modes. It achieves 1.5‑1.6 dB noise figure with ±1 ppm internal LO stability and optional external reference. Dual‑band switching is controlled by DC voltage. With IP65 rating and coaxial power feed, it applies to Ka‑band satellite receiving systems.

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    Product Detail

    This Ka‑Band 18.2‑21.2 GHz Low‑Noise Block (LNB) supports single‑band and optional dual‑band operation. Single‑band covers three receiving bands: 18.20‑19.20GHz, 19.20‑20.20GHz and 20.20‑21.20GHz. Two dual‑band configurations are available with unified IF output of 950‑1950 MHz. Noise figure is 1.5 dB for band 1,2,4 and 1.6 dB for band 3,5. Internal LO stability is ±1 ppm, and external reference is optional. Maximum LO leakage reaches ‑30dBm 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 excellent performance in phase noise, image rejection and spurious suppression.
    Power is fed through coaxial cable with 5 W power consumption. For dual‑band variant, high/low‑band switching is controlled by 12‑15VDC / 16‑24VDC DC voltage. RF input adopts WR42 grooved waveguide and IF output is N‑type female. Measuring 133×60×30 mm and weighing 0.42 kg, it features IP65 waterproof rating. Operating from ‑40℃ to +60℃ under condensing humidity conditions, it is widely deployed 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;

    Output Frequency

    950-1950 MHz

    Noise Figure

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

    LO Stability

    Internal reference (+/- 1 ppm);

    External reference (optional)

    LO Leakage Level (IF connector)

    -30 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

    30 dBc min.

    Output Spurious

    -50 dBc max.

    Input Power(Single-Band)

    12-24 VDC via IFL connector

    Input Power (Dual-band, optional)

    12-15 VDC, L-band; 16-24 VDC, H-band

    Power Consumption

    5 W

    Input Interface

    WR42 (Grooved)

    Input VSWR

    2.5:1

    Output Interface

    N-type female

    Output VSWR

    2.0:1

    Size

    133*60*30mm

    Weight

    0.42kg

    Operating Temperature

    -40 to +60 ℃

    Humidity

    0-100% (condensing)

    Water-proof Class

    IP65

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