Agile & Tuneable Solutions

Future RF systems must be flexible and adaptive to changes in spectrum and configuration, both in use and throughout their life cycle. As part of our adaptive filtering roadmap, BSC introduces novel approaches to market, which surpass the industry standards in terms of selectivity, power handling, miniaturisation and flexibility.

High Power Military Communications

BSC has developed and brought to production a 225 MHz – 400 MHz digitally tunable filter for Mil-Comms applications, offering a highly-selective 4-pole cross-coupled response with high ACPR, 50 W hot-tuned power handling and FPGA-based control with user-reconfigurability.

Comparison of BSC response (solid line) to existing products (dotted)

Deconfliction Filter System

High power counter-IED systems can often swamp the ability to receive vital situational awareness data and eliminate the possibility of any communication outside the ECM system range.  The need to liberate some of the spectrum in this C-IED environment is often when assets are at their most vulnerable. In the crowded spectrum of the future, front-end flexibility is of increasing importance.

The ECM Deconfliction Module and Enhanced Preselector are designed to be used in unison, with the Deconfliction unit placed between an ECM system and its antenna – providing a sharp, deep notch to open up a channel for a co-located radio to gain access. The companion Enhanced Preselector is positioned directly between the radio and its antenna to provide enhanced preselection on the radio front end, defending against desensitisation from the ECM emissions and maximising communications resilience & range.

The Deconfliction System can operate at fast switching speeds to support hopping protocols. Not limited to 225-400 MHz or equal channel widths, the same core architecture may be used in other specific bands, for example at VHF or L-Band frequencies. This makes the system equally suited to other applications where countermeasures, transmitter sensitivity and frequency-agile protocols are key to system function.

ECM Deconfliction Module:

ECM Module

ECM Unit for Deconfliction System

  • 24 Selectable channels
  • –3dB bandwidth, Fc +/- 30.0 MHz notch filters
  • –55dB attenuation, Fc +/- 3.65 MHz minimum
  • Fast, 10µs Switching Speed
  • 50 Watts power handling
  • Operating temperature –40° C to +85° C
  • Supports all radio hopping protocols

Our fully agile ECM Deconfliction Module, providing fast & seamless switching
into any of 24 filter states across the 225-400 MHz range. Designed to open a narrow communications channel with scalpel precision across a wide operating frequency, the unit allows greater safety and enables communications to be used during ECM-protected operations. Each channel can be switched in and out of the signal path with a switching time of less than 10µs. There is also provision for a through path removing all filtering. DC power and 8-bit TTL control is supplied through a standard 15-pin MDM connector.

ECM Module

Deconfliction System ECM Module

Specification: Characteristic:
Tuneable frequency Range 220 to 420 MHz
-3dB bandwidth Fc +/- 30.0 MHz typ
-55dB attenuation: Fc +/- 3.65 MHz min
Bypass Insertion Loss
220 – 420MHz
2.0dB max
RF Power handling: 50 watts CW
Passband VSWR: 1.5:1 nominal, 2.0:1 max
Reconfiguration Time: 10 µs max
Operating Temperature: -40°C to +85°C
Control Method: 8-bit TTL
DC Power Supply: +5 Volts
Current Consumption: 1.2 Amps max
RF Connectors: N Type female
DC & Control Connector: 15-pin Micro D connector
External Dimensions (Excluding Connectors): 135 x 181 x 42 mm typical

 

Pin Function Pin Function Pin Function
1 D0 1 Latch (not used) 1 N/C
2 D1 2 Ground 2 N/C
3 D2 3 N/C 3 N/C
4 D3 4 +5 Volts 4 N/C
5 D4 (not used) 5 Ground 5 N/C

Enhanced Preselector Module:

Radio Unit

EPM Unit for Deconfliction System

  • 24 Selectable channels
  • -1.0 dB Passband, Fc +/- 3.65 MHz bandpass filters
  • –50 dB Attenuation, Fc +/- 16.0 MHz minimum
  • Fast, 10µs switching speed
  • 50 Watts power handling
  • Operating temperature –40° C to +85° C
  • Supports all radio hopping protocols

Our fully-agile Enhanced Preselector Module, provides fast & seamless switching into any of 24 filter states across the 225-400 MHz range. By providing a highly-selective
complementary bandpass response in tandem with the radio and ECM Deconfliction Module, the Preselector enhances and further protects radio operation during ECM-enabled operations. Each channel can be switched in and out of the signal path with a switching time of less than 10µs. There is also provision for a through path removing all filtering. DC power and 8-bit TTL control is supplied through a standard 15-pin MDM connector.

DFU Enhanced Preselector

DFU Enhanced Preselector

 

Specification: Characteristic:
Tuneable Frequency Range: 220 to 420 MHz
Passband Insertion Loss: 6.5 dB max
-1dB Passband: Fc +/- 3.65 MHz min
-50dB rejection: Fc +/- 16 MHz min
Bypass Insertion Loss
220 – 420MHz
2.0dB max
Passband VSWR: 1.5:1 nominal, 2.0:1 max
RF Power handling: 50 watts C
Reconfiguration Time: 10 µs max
Operating Temperature: -40°C to +85°C
DC Power Supply: +5 Volts
Current Consumption: 1.2 Amps max
RF Connectors: N Type female
DC & Control Connector: 15-pin Micro D connector
External Dimensions (Excluding Connectors): 147 x 176 x 42 mm typical
Pin Function Pin Function Pin Function
1 D0 1 Latch (not used) 1 N/C
2 D1 2 Ground 2 N/C
3 D2 3 N/C 3 N/C
4 D3 4 +5 Volts 4 N/C
5 D4 (not used) 5 Ground 5 N/C

Agile Radar & EW Front-End

The Mil-Comms solution is built upon a flexible control architecture, which may be combined with alternative tuning mechanisms at S-Band, X-Band and beyond. The result is a family of tuneable solutions, configured to suit agile Radar or Broadband EW front-end applications.

Block Diagram

Active Filters

X band QFN packaged tunable regenerative filter. This tuneable filter includes amplification that recovers loss within the passband of the filter, but without amplifying signals outside of the filter passband.

Measured data is shown indicating that almost 0 dB loss can be provided with the passband  while maintaining an excellent roll off and wide stopbands outside the frequencies of interest.

Frequency Range:  1 MHz to 18 GHz
Tuning Speed:  As fast as 100 ns

  • Bandpass
  • Bandstop
  • Military Communications
  • Software Defined Radio Systems 
  • Electronic Warfare Front-end 
  • Agile Radar 
  • Test and Measurement
  • Open FPGA control architecture for Insitu reconfiguration
  • High-power variants
  • True cross-coupled responses available
  • Miniaturised variants in QFN packaging
  • Further integration with LNA’s, limiters & switching

Miniaturised & Phased Array

Building on BSC’s Thin Film filtering & integration heritage, it is possible to create highly-miniaturised tuneable filters which offer a level of performance in L, S and X bands that is traditionally commensurate with larger technologies. Such reduction in size allows for direct integration of agility into array elements themselves, opening up scope for greater function and resilience at system level.

Contact Sales

BSC is a world-leader in the design and manufacture of Microwave filter based active Subsystems, Modules and Filters, from low quantity prototypes, up to high production volumes.

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