BUC-K-4-18.75 is designed for MVDS TV broadcasting systems application in accordance with DVB-S/S2 or DVB-C and operates with up to 25 carriers. BUC-K-4-18.75 has output flange of PBR220 type (in accordance with WR42) and can be used with regular radio-relay link (directional) or broadcast (sector and OMNI) antennas.
BUC-K-4-18.75 supports all modulation types up to 32APSK and 256QAM. BUC-K-4-18.75 has the best linearity parameters to ensure the stability of the output frequency and low IMD3 level. BUC-K-4-18.75 has input frequency range of 950-1450 MHz (L-band) and provides 19.7-20.2 GHz output frequency range (K-band).
BUC-K-4-18.75 is a high-performance K-band Block Upconverter engineered for professional satellite uplinks, MVDS broadcasting and mobile TV applications. As a solid-state K-band BUC transmitter, it features a fixed 18.75 GHz PLL local oscillator that guarantees excellent frequency stability, ultra-low phase noise and reliable RF conversion. With its integrated 10 MHz reference, the BUC-K-4-18.75 ensures synchronization in DVB-S/S2 and DVB-C systems, delivering clean signal transmission even under complex modulation schemes like 32APSK and 256QAM.
The BUC-K-4-18.75 K-band SSPA provides a P1dB output power of 4 W (400 mW ALC power) and ≥47 dB gain, supported by integrated ALC circuitry for stable and automatic output control. Designed with WR42 (PBR220 flange) waveguide output and N-type female IF input, this K-band BUC amplifier is a compact, efficient and rugged choice for system integrators requiring high-linearity K-band Block Upconverters with professional-grade spectral purity.
✅ Engineered for outdoor deployment
The BUC-K-4-18.75 features a weatherproof and ruggedized enclosure, ensuring reliable operation in harsh conditions. Its design with WR42 waveguide output and N-type female IF input makes it a fully integrated outdoor K-band Block Upconverter ready for MVDS, DSNG and terrestrial broadcasting.
✅ Multicarrier operation up to 25 carriers
This multicarrier K-band BUC is optimized for DVB-S/S2 applications, supporting up to 25 carriers with low phase noise (−85 dBc/Hz @10 kHz) and high spectral purity. Its spurious suppression (≤−55 dBc in-band) ensures clean and interference-free signal transmission.
✅ Reliable choice for MVDS and uplink projects
The BUC-K-4-18.75 is a compact K-band Block Upconverter designed for satellite uplinks, MVDS repeaters and TV broadcasting systems. With low power consumption (≤30 W) and lightweight design (~1.25 kg), it offers flexibility for installations in mobile, fixed and tactical broadcasting environments.
🛠️ Whether you are integrating a K-band BUC for satellite uplinks, sourcing a K-band BUC with PLL LO 18.75 GHz, or deploying a K-band RF amplifier with WR42 flange, the BUC-K-4-18.75 is optimized for stability, efficiency and reliability.
🛒 The BUC-K-4-18.75 is now available to order online, providing engineers with a dependable K-band Block Upconverter ready for demanding DVB-S/S2 and DSNG systems.
📌 Key features
-
Solid-state K-band BUC-K-4-18.75 with compact design
This solid-state K-band BUC amplifier offers 4 W output power at P1dB with outstanding linearity, ensuring stable signal transmission for satellite uplinks and MVDS broadcasting. Its compact enclosure makes it suitable for mobile and space-limited integrations.
-
PLL-stabilized 18.75 GHz LO with ±2 ppm stability
The K-band BUC-K-4-18.75 Block Upconverter uses a fixed 18.75 GHz PLL local oscillator, providing frequency stability essential for DVB-S/S2 K-band uplink systems. Its phase noise (−85 dBc/Hz @10 kHz) ensures clean carrier performance.
-
4 W output power with ALC control
Delivering 4 W P1dB and 400 mW ALC output, the BUC-K-4-18.75 transmitter maintains stable gain (≥47 dB) and prevents overdrive, making it ideal for multicarrier K-band BUC applications.
-
WR42 (PBR220) flange RF output and N-type IF input
The BUC-K-4-18.75 features a WR42 flange waveguide output and N-type female IF input, ensuring seamless integration into existing K-band uplink chains, TV repeater systems and DSNG platforms.
-
Superior spectral performance
With spurious rejection of ≤−55 dBc and LO leakage ≤−40 dBm, this high-linearity K-band BUC ensures clean transmission across the full 19.7-20.2 GHz output band.
⚙️ Main functions
-
Precise IF to K-band upconversion
The BUC-K-4-18.75 Block Upconverter performs L-band (950-1450 MHz) to K-band (19.7-20.2 GHz) conversion, supporting DVB-S/S2 uplinks and ensuring compatibility with satellite modulators.
-
Automatic Level Control (ALC)
Its integrated ALC system regulates output power dynamically, delivering reliable gain control across varying input levels and preventing distortion in multicarrier K-band applications.
-
Stable operation with PLL and 10 MHz reference
The K-band BUC-K-4-18.75 maintains long-term frequency accuracy and stability with its PLL-stabilized LO and internal 10 MHz reference, crucial for professional-grade broadcasting and telecom systems.
-
Filtering and linear amplification
Internal RF filtering and amplification guarantee high linearity, minimal intermodulation and low spurious noise-ideal for broadcast, telecom and military K-band uplink projects.
🧩 Applications
The BUC-K-4-18.75 SSPA is an ideal low-power transmitter for VSAT terminals and DSNG applications, where compactness and efficiency are critical.
This MVDS K-band Block Upconverter ensures stable RF transmission for terrestrial broadcasting systems using DVB-S/S2 and DVB-C standards.
-
TV repeater and broadcast stations
As a professional K-band BUC transmitter, it provides stable performance for repeater setups requiring high linearity and reliable output.
-
Mobile broadcast and tactical communication
Weighing only 1.25 kg, the BUC-K-4-18.75 amplifier integrates seamlessly into mobile broadcast vans, flyaway systems and field-deployable uplink terminals.
-
OEM and integration projects
The compact K-band Block Upconverter BUC-K-4-18.75 is designed for OEMs and integrators needing small, efficient and professional-grade K-band modules.
💡 Why you should buy from us❓
- 1.5 years warranty
- 7 years after-sales support
- Remote support team of engineers
- Discount program for regular customers 🎁
💬 Contact Us
For additional details or assistance regarding the BUC-K-4-18.75, feel free to contact our team. We provide professional consultation and after-sales support to help with installation and setup, ensuring you get the most out of your broadcasting equipment. BUC-K-4-18.75 is available to customize its parameters by order.
