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Ka-band satellite communication systems are increasingly important for high-capacity broadband connectivity, professional satellite networks, teleport infrastructure, and advanced ground stations. Operating at higher frequencies allows satellite systems to support demanding communication requirements, but it also creates challenges for RF signal processing, frequency conversion, phase noise, and signal quality.
For professional satellite reception systems, selecting a suitable frequency conversion component is essential to maintaining reliable performance throughout the signal chain.
The SMW Ka-Band BDC 17.30–22.30 GHz 1 Band, manufactured by Swedish Microwave AB, is a professional single-band block downconverter designed for satellite reception systems that require conversion of a selected Ka-band frequency sub-band into an L-band intermediate frequency (IF) output.
The product is designed for applications where the receiving system needs to process only one sub-band within the 17.30–22.30 GHz frequency range and uses an external Low Noise Amplifier (LNA), or already has an LNA installed.
Combining high P1dB and IP3 performance, low phase noise, automatic switching between internal and external frequency references, programmable gain, and optional monitoring and control capabilities, this BDC provides a flexible solution for professional satellite ground stations.
The unit supports multiple local oscillator configurations, allowing system integrators to select an appropriate frequency plan for their receiving architecture. Optional alarm and monitoring interfaces also make it possible to integrate multiple units into a centralized management system.
VSATPlus offers professional satellite communication equipment and RF components, including solutions from Swedish Microwave. Contact VSATPlus for pricing, availability, configuration assistance, and ordering information for the SMW Ka-Band BDC.
The SMW Ka-Band BDC is a single-band block downconverter designed to receive a selected frequency sub-band within the Ka-band range of 17.30–22.30 GHz and convert it to an L-band intermediate frequency.
In a satellite reception system, the incoming RF signal must be processed and converted into a frequency range that downstream equipment can handle.
The BDC performs this frequency conversion using a local oscillator (LO). The selected LO configuration determines the relationship between the incoming Ka-band frequency and the resulting IF frequency.
The SMW unit is intended for installations that use an external LNA or already have an LNA installed. It is therefore important to distinguish this product from a complete integrated LNB: the BDC is designed to work as part of a receiving chain that includes the required low-noise amplification.
The product offers several LO configurations, with different RF input and IF output frequency plans. This allows system designers to select a model suited to their satellite frequency allocation and downstream receiver requirements.
The datasheet identifies the following main characteristics:
These features make the unit suitable for professional satellite reception architectures that require precise frequency conversion and flexible system integration.
The primary function of the SMW Ka-Band BDC is to convert a selected Ka-band RF sub-band into an L-band intermediate frequency.
The product family covers RF input frequencies within the broader 17.30–22.30 GHz range, with individual LO configurations supporting different sub-bands.
The available configurations include input ranges beginning at 17.30 GHz and extending through 22.20 GHz, depending on the selected LO.
This allows system integrators to select the appropriate frequency plan for their satellite reception requirements.
Frequency stability is essential in professional satellite communication systems.
The SMW BDC features automatic switching between an external 10 MHz frequency reference and its internal reference.
When an external reference is available, the unit can use it for LO synchronization. When an external reference is not available, the internal reference provides the alternative frequency reference.
The internal reference stability is specified as ±2.5 ppm over the temperature range of -40°C to +80°C.
The external reference accepts a sine-wave signal with an input level between -10 and +10 dBm.
This automatic reference arrangement provides flexibility for installations with centralized reference distribution as well as systems operating without an external reference source.
The datasheet identifies high P1dB and IP3 as key product features.
These parameters are important indicators of RF signal-handling capability and linearity.
P1dB (1 dB Compression Point) indicates the output level at which the amplifier or conversion chain begins to depart from its linear response by 1 dB.
IP3 (Third-Order Intercept Point) is an important indicator of intermodulation performance when multiple signals are present.
The SMW BDC specifies different minimum output P1dB and IP3 values depending on the programmed gain range:
These specifications make the unit relevant to receiving systems where multiple carriers and demanding signal-level requirements must be considered.
Phase noise is particularly important in advanced satellite modulation systems.
Excessive phase noise can affect carrier quality and make it more difficult for downstream receivers to demodulate signals accurately.
The SMW Ka-Band BDC features low phase noise, and the manufacturer states that its performance meets all profiles of DVB-S2X.
For the 19.20/19.25 GHz LO models, the datasheet also provides an integrated phase-noise specification of less than 3.4° RMS, using single-sideband phase noise integrated over 10 Hz to 16 kHz relative to the carrier centre frequency.
This characteristic makes the product suitable for professional satellite reception systems that use advanced DVB-S2X modulation profiles.
The BDC offers a typical gain range of 30–60 dB in 5 dB steps.
Gain is factory programmable, allowing the unit to be configured according to the signal-level requirements of the receiving system.
This flexibility is useful when integrating the BDC with different downstream receivers, distribution equipment, and satellite ground-station architectures.
The manufacturer also lists customized gain as an available option.
Gain stability is important in satellite reception because signal-level variations can affect the performance of downstream equipment.
The SMW BDC specifies gain variation over 24 hours of:
±0.1 dB at 23°C.
This provides a defined stability reference for system designers evaluating the unit’s performance in professional installations.
The datasheet lists eleven LO configurations:
16.35, 16.75, 17.20, 17.25, 18.20, 18.25, 18.75, 19.20, 19.25, 20.20, and 20.25 GHz.
Each configuration supports a particular RF input and IF output frequency plan.
This flexibility allows system integrators to select a model that matches the satellite frequency allocation and the required intermediate frequency.
Customized LO configurations are also available as an option.
For professional installations containing several frequency converters, centralized monitoring can simplify system management and maintenance.
The SMW BDC supports optional alarm and Monitoring & Control functionality.
The optional interface allows several units to be connected in a Modbus RTU RS485 network.
The manufacturer identifies alarm monitoring for:
This can help operators identify equipment faults and monitor important operating conditions across a larger receiving installation.
The SMW Ka-Band BDC is specified for storage and operation from:
-40°C to +80°C (-40°F to +176°F).
This wide temperature range makes the unit suitable for professional installations exposed to challenging environmental conditions.
The specified range is an important consideration for satellite ground stations and outdoor equipment installations.
The SMW Ka-Band BDC offers several practical advantages for satellite system integrators and professional operators.
Flexible frequency planning: Multiple LO configurations support different Ka-band sub-bands and IF frequency plans.
Reference flexibility: Automatic internal and external reference switching supports different system architectures.
High linearity: The specified P1dB and IP3 performance supports demanding multi-carrier reception requirements.
Low phase noise: The manufacturer specifies phase-noise performance suitable for all DVB-S2X profiles.
Adjustable gain configuration: Factory-programmable gain from 30 to 60 dB provides flexibility when integrating the unit into different receiving systems.
Stable gain: The specified 24-hour gain variation of ±0.1 dB at 23°C provides a defined stability performance.
Remote monitoring options: Optional Modbus RTU RS485 monitoring allows multiple units to be connected in a management network.
Environmental flexibility: Operation from -40°C to +80°C supports a wide range of installation environments.
Custom configuration: Customized LO, gain, and extended IF options provide additional flexibility.
Together, these features make the SMW Ka-Band BDC a useful component for professional satellite reception systems requiring reliable and configurable Ka-band frequency conversion.
Satellite ground stations require precise frequency conversion to process incoming satellite signals and deliver them to downstream receivers.
The SMW BDC can be integrated into a receiving chain where a selected Ka-band sub-band needs to be converted into an L-band IF signal.
Its multiple LO options allow system designers to select a configuration appropriate for the incoming satellite frequency allocation.
Teleports and satellite gateways often operate multiple receiving channels and require reliable RF components.
The SMW BDC can be used as part of a professional receiving architecture where high linearity, low phase noise, and programmable gain are important.
Its optional monitoring and control interface can also be useful when several units are installed across a larger facility.
The manufacturer specifically highlights that the product’s phase-noise performance meets all profiles of DVB-S2X.
This makes the BDC relevant to receiving systems using advanced DVB-S2X modulation configurations.
Its phase-noise characteristics are particularly important in applications where accurate carrier recovery and signal quality are required.
Systems receiving multiple carriers may require RF components with appropriate linearity and intermodulation performance.
The BDC’s P1dB and IP3 specifications provide important design information for evaluating its suitability in multi-carrier applications.
System designers should consider the total signal power and gain configuration when integrating the converter.
The SMW Ka-Band BDC can form part of professional satellite communication networks that use Ka-band reception and L-band IF distribution.
Potential installations include:
The exact suitability depends on the satellite frequency plan, the external LNA, the downstream receiver, and the complete RF link budget.
The following tables summarize the technical information provided in the Swedish Microwave datasheet, Revision 2501.
| Specification | Details |
|---|---|
| Product Name | Ka BDC 17.30–22.30 GHz 1 Band |
| Manufacturer | Swedish Microwave AB |
| Product Type | Ka-Band Single-Band Block Downconverter |
| RF Frequency Family | 17.30–22.30 GHz |
| Input Configuration | SMA female, 50 Ω |
| IF Output | L-band |
| LO Configurations | 11 standard LO options |
| Gain | 30–60 dB typical |
| Gain Adjustment | 5 dB steps |
| Gain Programming | Factory programmable |
| Reference Selection | Automatic internal/external |
| Monitoring & Control | Optional |
| Alarm Functions | Optional |
The following table reproduces the frequency configurations listed in the manufacturer’s datasheet.
| LO Frequency (GHz) | RF Input Frequency (GHz) | IF Output Frequency (MHz) |
|---|---|---|
| 16.35 | 17.30–18.30 | 950–1950 |
| 16.75 | 17.70–18.70 | 950–1950 |
| 17.20 | 18.20–19.20 | 1000–2000 |
| 17.25 | 18.20–19.20 | 950–1950 |
| 18.20 | 19.20–20.20 | 1000–2000 |
| 18.25 | 19.20–20.20 | 950–1950 |
| 18.75 | 19.70–20.20 | 950–1450 |
| 19.20 | 20.20–21.20 | 1000–2000 |
| 19.25 | 20.20–21.20 | 950–1950 |
| 20.20 | 21.20–22.20 | 1000–2000 |
| 20.25 | 21.20–22.20 | 950–1950 |
The datasheet also lists an optional extended IF range of 950–2250 MHz.
Important: The RF input frequency and IF output range depend on the selected LO configuration. Customers should specify their required satellite frequency plan when requesting a quotation.
| Specification | Value |
|---|---|
| RF Input Frequency | Depends on selected LO; see frequency table |
| Input Connector | SMA female |
| Input Impedance | 50 Ω |
| DC Input | +12 to +26 V DC |
| Power Consumption | 5 W maximum |
| DC Input Method | Through output connector or optional separate SMA connector |
| Input VSWR | 1.9:1 maximum, with included isolator |
| LO Reference | Automatic external/internal selection |
| Internal Reference Stability | ±2.5 ppm, -40°C to +80°C |
| External Reference Frequency | 10 MHz |
| External Reference Waveform | Sine wave |
| External Reference Level | -10 to +10 dBm |
| External Reference Connection | Supplied through output connector |
| LO Leakage at RF Input | -60 dBm maximum |
| Specification | Value |
|---|---|
| LO Leakage at IF Output | -40 dBm maximum |
| Gain | 30–60 dB typical |
| Gain Steps | 5 dB |
| Gain Programming | Factory programmable |
| Gain Variation over 24 Hours | ±0.1 dB at 23°C |
| Gain Flatness within 30 MHz | ±0.4 dB |
| Gain Flatness over Full Band | ±2 dB maximum |
| Noise Figure | 2–4 dB, depending on gain |
| Group Delay | ±1 ns maximum |
| Image Rejection | 30 dB minimum |
| Frequency Offset | Phase Noise |
|---|---|
| 10 Hz | -35 dBc |
| 100 Hz | -65 dBc |
| 1 kHz | -80 dBc |
| 10 kHz | -85 dBc |
| 100 kHz | -95 dBc |
| >1 MHz | -112 dBc/Hz typical |
Integrated Phase Noise – 19.20/19.25 GHz Models
| Specification | Value |
|---|---|
| Integration Bandwidth | 10 Hz–16 kHz |
| Integrated Phase Noise | <3.4° RMS |
| Two-Sided Value | <4.8° RMS |
The integrated phase-noise specification is explicitly identified for the 19.20/19.25 GHz models in the datasheet.
| Specification | Value |
|---|---|
| Standard IF Output Options | 950–1950 MHz or 1000–2000 MHz |
| Optional Extended IF | 950–2250 MHz |
| Output P1dB at 30–40 dB Gain | +5 dBm minimum |
| Output P1dB at 45–60 dB Gain | +15 dBm minimum |
| Output IP3 at 30–40 dB Gain | +15 dBm minimum |
| Output IP3 at 45–60 dB Gain | +25 dBm minimum |
| Output VSWR | 1.7:1 typical |
| Output Connector Options | N-type 50 Ω, SMA-type 50 Ω, or F-type 75 Ω |
| Specification | Details |
|---|---|
| Alarm Function | Optional |
| Alarm Configuration | Sum alarm |
| Alarm Selection | Configurable through M&C |
| LNA Failure Monitoring | Supported |
| Total Current Monitoring | Supported |
| LO Lock Monitoring | External/internal/not applicable |
| Signal Power Monitoring | High/low |
| Supply Voltage Monitoring | Low-voltage alarm |
| Alarm Output | Open collector |
| Alarm Voltage Range | 3.3–28 V |
| Maximum Alarm Current | 200 mA |
| Host-Side Pull-Up | 10 kΩ |
| Alarm Connector Pin | Pin 1 of M8 connector |
| M&C Interface | Modbus RTU RS485 |
| Optional Connector | M8 female, four-pin, A-coded |
The optional M&C interface allows multiple units to be cascaded in a Modbus RTU RS485 network. Shielded cables are specified by the manufacturer.
| Specification | Value |
|---|---|
| Dimensions with N Connectors | 171 × 80 × 46 mm |
| Weight with N Connector | 418 g |
| Isolator | Included in stated dimensions and weight |
| Operating Temperature | -40°C to +80°C |
| Storage Temperature | -40°C to +80°C |
| Operating Temperature in Fahrenheit | -40°F to +176°F |
| Storage Temperature in Fahrenheit | -40°F to +176°F |
| Environmental Condition | MTBF |
|---|---|
| Ground Fixed (GF) | >690,000 hours |
| Airborne, Inhabited, Cargo (AIC) | >360,000 hours |
| Quality Level | Commercial |
| Calculation Ambient Temperature | +35°C |
The MTBF values are calculated according to MIL-HDBK-217F Notice 2, as stated in the manufacturer’s datasheet. They are reliability estimates and should not be interpreted as guaranteed operating lifetimes.
The SMW BDC offers standard and optional connector arrangements.
| Specification | Details |
|---|---|
| Standard Type | N female |
| Optional Types | F female or SMA female |
| Functions | L-band output, DC input, external 10 MHz reference |
| Specification | Details |
|---|---|
| Connector Type | M8 female, four-pin, A-coded |
| Functions | Alarm and Monitoring & Control |
| Pin 1 | Alarm open collector, maximum 200 mA, or optional DC input |
| Pin 2 | A positive RS485 |
| Pin 3 | B negative RS485 |
| Pin 4 | Common ground |
| Specification | Details |
|---|---|
| Connector Type | SMA female only |
| Functions | External 10 MHz reference and/or DC input |
The connector options allow the converter to be configured for different power, reference, and monitoring arrangements.
The manufacturer lists several optional configurations for customers with specific system requirements.
Customized Gain: Gain can be configured according to the requirements of the receiving system.
Customized LO: An alternative local oscillator configuration can be requested.
Extended IF: An extended IF output range of 950–2250 MHz is available as an option.
Input Frequency from 17.20 GHz: The manufacturer identifies an option for input frequencies starting at 17.20 GHz.
Separate DC or External Reference Connector: An additional SMA connector can be used for DC input or external 10 MHz reference.
Alarm and Monitoring & Control: Optional M&C functionality supports centralized management through Modbus RTU RS485.
These options make it important to specify the intended frequency plan, output requirements, and control interfaces when requesting a quotation.
Before selecting the SMW Ka-Band BDC, engineers and system integrators should consider several important factors.
Frequency plan: Select the appropriate LO configuration based on the required RF input and IF output frequencies.
External LNA: The product is intended for use with an external LNA or an existing LNA in the receiving chain.
IF compatibility: Confirm that the downstream receiver supports the selected IF range.
Reference configuration: Determine whether the installation will use the internal reference or a centralized external 10 MHz reference.
Power supply: Ensure that the installation provides the required +12 to +26 V DC supply and respects the maximum 5 W power consumption.
Gain selection: Select an appropriate factory-programmed gain configuration based on the system link budget and downstream equipment requirements.
Output connector: Confirm whether N-type, SMA-type, or F-type connectivity is required.
Monitoring requirements: If centralized monitoring is needed, specify the optional M8 connector and Modbus RTU RS485 interface.
Environmental conditions: Confirm that the installation remains within the specified -40°C to +80°C operating and storage temperature range.
These considerations help ensure that the selected BDC configuration is compatible with the complete satellite receiving system.
The SMW Ka-Band BDC 17.30–22.30 GHz 1 Band is designed for professional satellite reception systems that require precise Ka-band frequency conversion, low phase noise, high linearity, and flexible IF configurations.
Its multiple LO options, automatic reference switching, programmable gain, optional monitoring and control, and wide operating temperature range make it a versatile component for satellite ground stations, teleports, DVB-S2X reception, and professional Ka-band infrastructure.
At VSATplus, customers can inquire about Swedish Microwave products and professional satellite communication components for their specific installation requirements.
Whether you need a standard frequency configuration or a customized solution with a particular LO, gain, IF output, or monitoring interface, VSATPlus can help you identify the appropriate product configuration.
Looking for the SMW Ka BDC 17.30–22.30 GHz 1 Band?
Contact VSATPlus for:
Website: www.vsatplus.com
Email: sales@vsatplus.com
Request a quote from VSATPlus today and find the right Swedish Microwave Ka-band frequency conversion solution for your professional satellite communication system.
