What BSC Filters Ltd. does

BSC Filters Ltd. is a York, England-headquartered designer and manufacturer of custom RF and Microwave filters and filter-based active subsystems serving global Defence and Space original equipment manufacturers (OEMs). Founded in 1989 and operating as a brand under Dover Corporation's Microwave Products Group, the company specialises in Interdigital, Combline, Waveguide, Cavity, Lumped Element, Thin Film, and Microstrip filter topologies spanning 300 KHz to 40 GHz, with claimed capability of more than 14,000 completed product designs over 30+ years and stated full qualification for many global Defence and Space OEM programs. Primary end-use applications include electronic warfare, radar, satellite communications, multi-radio co-site interference mitigation, and GPS interference protection for airborne, missile, ground, and launch/reentry platforms.

The company's technical stack centres on a proprietary 'Elliptic' filter design methodology packaged in an in-house 'Exact Filter' software tool, with validation via Cosmos FEA for failure-mode simulation. Manufacturing is supported by a world-class humidity- and temperature-controlled facility featuring in-house CNC machining, thermal chambers, and vibration testing, alongside commercial design tools (AutoCAD, Microwave Office, CST, SolidWorks). The product portfolio spans discrete filters (Bandpass, Bandreject, Lowpass, Highpass, Multiplexers), switches (Coaxial, Waveguide, Space-Qualified, High-Power, High-Repeatability), and integrated solutions including Subsystems/IMAs, Switch Matrices, Switched Filter Banks, Receivers, Cancellers, Frequency Converters, and Low Noise Amplifiers. Digital channels include the FilterWizard® and MPG Wizards configuration platforms, the Product Finder, and an 'Ask An Engineer' consultation pathway.

BSC operates a B2B custom-manufacturing business model with direct enterprise field sales, quote-based pricing tied to customer specifications and volume, and dedicated sales-support engineering consultation. Customer segmentation is vertical, with Defence and Space as primary segments, supplemented by Aerospace, Automated Test Equipment (since 1999), Communications, and GPS/GNSS. Distribution is direct-to-OEM globally, supported by a North American office in Austin, TX. The company is privately held as a wholly owned operating subsidiary within the publicly listed Dover Corporation (NYSE: DOV), with operational certifications including ISO 9001:2015, ISO 14001:2015 (both valid through 2027), and JOSCAR registration.

Name

BSC Filters Ltd.

Legal name

BSC Filters Limited

Website

https://bscfilters.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

51–100 employees

Short description

BSC Filters Ltd. designs and manufactures custom RF and Microwave filters, switches, and integrated microwave assemblies for global Defence and Space OEMs. Headquartered in York, England, the firm operates as a brand within Dover Corporation's Microwave Products Group.

Ownership category

akta.pro rank

Product category

RF and Microwave Filters

NAICS

Semiconductor and Other Electronic Component Manufacturing (33441), Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing (334511)

SIC

Electrical Industrial Apparatus (3620)

akta.pro primary industry

Military Power Supplies, RF/Microwave Components & Ruggedized Electronics (IMABAGAJ)

akta.pro secondary industry

Passive Filters & RF Passives (LC Filters/Diplexers/Baluns/Attenuators) (HDAHANAG)

Keywords

• RF and Microwave filters
• Defense electronics components
• Space-qualified components
• Integrated Microwave Assemblies
• Coaxial switches

Headquarters

HQ city

York

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure

Revenue model

1. RF and Microwave Filter Products: Custom design and manufacture of RF and Microwave filters including Bandpass, Bandreject, Highpass, and Lowpass filters for Defence and Space customers. Products range from simple standalone filters to complex Integrated Microwave Assemblies (IMAs). Revenue generated through product sales, with custom engineering and prototyping services supporting the hardware sales motion.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

BSC Filters Ltd. designs and manufactures custom RF and Microwave filters (bandpass, bandreject, lowpass, highpass and elliptic), coaxial and waveguide switches, and complex Integrated Microwave Assemblies (IMAs) and filter-based subsystems. Products cover frequencies from 300 KHz to 40 GHz and are supplied to Defence and Space OEM customers globally. The company provides full custom design, in-house CNC machining, automated test, and qualification support for mission-critical electronic warfare, radar, communications, and space payload applications.

Product overview

BSC Filters Ltd. is a world-leader in RF and Microwave filter design and manufacturing, offering a comprehensive portfolio of filter products (Bandpass, Bandreject, Lowpass, Highpass, Multiplexers), switches (Coaxial, Waveguide, Space Qualified), and integrated solutions (Subsystems, IMAs, Switch Matrices, Receivers, Cancellers, Frequency Converters, Low Noise Amplifiers). The company specializes in custom Interdigital, Combline, Waveguide, Cavity, Lumped Element, Thin Film, and Microstrip filter technologies for Defense and Space industries. The product portfolio is organized into four main categories: Filters, Switches, Solutions, and Spectrum Operations. MPG Wizards serves as a product selection and design assistance tool. The company also provides market-specific solutions for Aerospace, Defense, ATE, Communications, Space, and GPS applications.

Differentiator

Problem solved

Functional benefit

Brands

• FilterWizard®: Online design and configuration tool for RF and Microwave filters

Products and services

• Bandpass Filters Custom-designed RF and Microwave bandpass filters that pass a defined frequency band while rejecting out-of-band signals, supplied to defence and space OEM customers across 300 KHz to 40 GHz.
• Bandreject (Notch) Filters Custom RF/Microwave bandreject (notch) filters that suppress specific unwanted frequency ranges while passing others, supplied for defence and space electronic warfare and communications systems.
• Lowpass Filters Custom RF/Microwave lowpass filters that pass signals below a specified cutoff frequency and attenuate higher frequencies, supplied to defence and space OEM customers.
• Highpass Filters Custom RF/Microwave highpass filters that pass signals above a specified cutoff frequency and reject lower frequencies, supplied to defence and space OEM customers.
• Elliptic Filters High-performance elliptic RF/Microwave filters that achieve steep skirts and high selectivity, designed and manufactured using BSC's proprietary elliptic filter technology for defence and space applications.
• Coaxial Switches Custom coaxial RF switches for signal routing in defence and space RF front-ends, designed and manufactured in-house by BSC.
• Waveguide Switches Custom waveguide RF switches for high-frequency signal routing in defence and space radar and communications systems, designed and manufactured in-house by BSC.
• Integrated Microwave Assemblies (IMAs) and Subsystems Complex Integrated Microwave Assemblies (IMAs) and filter-based active subsystems and modules that combine multiple RF functions into integrated units for defence and space customers.

Segments6 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Mini-Circuits: Independent large-scale RF and microwave component manufacturer offering broad filter, mixer, and amplifier catalogues. Comparable in core filter product category; differs in being high-volume, catalogue-driven rather than fully custom defence/space.
• Dow-Key Microwave: Sister brand under MPG focused on coaxial and waveguide electromechanical switches, including space-qualified switches. Direct competitor in the RF switch category where BSC also sells coaxial, waveguide, and space-qualified switches.
• Pole/Zero: Sister brand under Microwave Products Group specializing in RF filtering, cosite interference mitigation, and integrated RF subsystems for defence platforms. Directly comparable product portfolio and customer base; competing for the same defence cosite and EW programmes.
• K&L Microwave: Sister brand under Microwave Products Group (Dover Corporation) that designs and manufactures RF and microwave filters, diplexers, and subassemblies. Direct competitor in the same product category and end markets; the most comparable peer given shared corporate parent and overlapping technology.
• Lorch Microwave: Designer and manufacturer of custom RF and microwave filters, multiplexers, and integrated assemblies for defence and commercial customers. Direct comparable in custom filter design for similar frequency bands and applications.
• RLC Electronics: Custom RF and microwave filter manufacturer serving defence, aerospace, and test and measurement customers. Directly comparable product offering (custom bandpass, bandreject, lowpass, highpass) and end-market mix to BSC.

Broad incumbents

• Crane Aerospace & Electronics: Diversified aerospace and defence electronics supplier offering RF, microwave, and electronic warfare subsystems. Adjacent incumbent competing for RF content on the same defence and space platforms as BSC.
• Mercury Systems: Larger defence electronics prime with significant RF, microwave, and signal conditioning content serving aerospace and defence primes. Overlaps with BSC in custom RF subsystems but operates at substantially greater scale and as an integrator.
• Smiths Interconnect: Defence and aerospace RF/microwave component and subsystem supplier offering filters, interconnects, and integrated microwave assemblies. Comparable customer base in defence, space, and test & measurement with broader product breadth.
• Qorvo: Large-scale RF solutions provider with defence and space businesses spanning amplifiers, filters, and integrated modules. Competes with BSC at higher volume tiers and integrated module level, particularly in defence and SATCOM programmes.

Market position

Strengths2 records

Weaknesses1 record

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/bsc-filters

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about BSC Filters Ltd.