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Custom engineeringCustom RF filters and assemblies built around your specification
Send a specification, a frequency plan, a reference part number, a mechanical drawing or preliminary requirements. We review what you have and tell you what can be built.
Any of these is a valid starting point
You don't need a finished specification. Partial information is enough for a first review, and gaps are filled in during requirements review.
- A specification or statement of work with electrical targets
- A frequency plan or band diagram showing what must pass and what must be rejected
- A reference part number to match, replace or improve on
- A mechanical drawing or outline and connector requirements
- Preliminary requirements when the design is still being defined
How a project runs
The steps below describe how an inquiry is handled. Scope of each step, including simulation and any qualification testing, is agreed per project.
Requirements review
Passband, rejection, loss, VSWR, power, size and interface are checked against each other. Conflicts, such as a rejection target the available size can't reach, are raised at this stage.
Topology selection and design
Technology and filter order are chosen to meet the template within the mechanical limits. See the table below for technologies in the catalog.
Simulation, where applicable
Circuit or EM simulation predicts the response before hardware is built. Whether and how much depends on the topology.
Prototype development
A prototype is built to the proposed design so the response can be measured.
RF measurement and validation
The measured response is compared with the agreed specification. Environmental or mechanical testing is scoped with you if the application calls for it.
Production and quality control
Production within the company's AS9100 quality system, with the checks for unit-to-unit consistency defined for the project.
Filter technologies in the catalog
Not every requirement suits every technology. Feasibility is confirmed during requirements review.
| Technology | Typical use | Published datasheets |
|---|---|---|
| Cavity / comb-cavity | Low insertion loss and high rejection at higher power | 13 |
| Interdigital | Compact band-pass filters at microwave frequencies | 2 |
| Stripline | Low-pass and high-pass filtering over wide ranges | 3 |
| LC (connectorized and SMT) | Lower frequencies and compact size | 17 |
| Ceramic mono-block, LTCC | Small SMT band-pass filters | 10 |
| SAW, BAW | Steep selectivity in fixed cellular, satellite and navigation bands | 17 |
Information that speeds up a quotation
Include what you know. Anything left out is discussed with you rather than assumed.
| Item | What to tell us |
|---|---|
| Frequency range | Passband (or cutoff / stopband) edges, and center frequency if relevant |
| Insertion loss | Maximum across the passband |
| Rejection | Frequencies and the attenuation required at each, including harmonics |
| Return loss / VSWR | Minimum return loss or maximum VSWR in the passband |
| Power | CW and peak, and the temperature at which it applies |
| Impedance and interface | Impedance, connector type or SMT footprint, mounting |
| Mechanical | Outline limits, weight, drawing if you have one |
| Environment | Operating and storage temperature, shock/vibration or other conditions that apply |
| Quantity and schedule | Prototype and expected production quantities, and any key dates |
Schedule, quantities, qualification scope and pricing are agreed per project after review. Turnaround depends on technology and complexity, so no standard lead time is quoted here.
Discuss a Custom RF Project
Send what you have. We review it and reply by email.