We design and build SMT and connectorized RF filters — cavity, interdigital, LC, ceramic and LTCC — along with diplexers, multiplexers and active filter-amplifier assemblies. Every part starts from a customer's frequency plan, not a catalog page, and every design is simulated and validated before it goes to production.
Nexis Microwave is a small RF filter house. We design cavity, interdigital, ceramic, LC and LTCC filters, and over the years that grew into diplexers, multiplexers and active filter-amplifier assemblies — mostly because customers kept asking us to take on the next stage of the chain rather than hand it to a second vendor.
Every part is run through electromagnetic simulation before we cut a prototype, and we don't sign off on a design until it's been measured against the conditions it'll actually operate in — temperature, vibration, connector interfaces, the full environmental picture, not just the datasheet curve. That discipline comes from years of supplying filters into defense and communications programs, where a part that looks good on paper but fails on the bench isn't good enough.
We still work from the customer's frequency plan, not a catalog page. "Tailor-made" isn't a slogan here — it's the reason a client calls us instead of pulling a part number off a distributor's shelf.
Tolerances and repeatability that hold up in production, not just on the first prototype off the bench.
Passband, insertion loss and rejection engineered against the environment your system runs in — not a lab bench.
We start from your frequency plan, footprint and power budget. If it doesn't fit a catalog part, we design one that does.
Thermal, mechanical and environmental qualification built into the design from the first revision — under our AS9100-certified quality system.
Four platforms, each engineered from first principles and built to your frequency, footprint and power requirements — not adapted from an existing part.
Compact surface-mount filters for board-level integration — LC, ceramic or LTCC construction, chosen by your frequency, footprint and performance target.
View DatasheetsStandalone Low-Pass, Band-Pass, High-Pass and Band-Stop filters in connectorized housings — cavity, interdigital or stripline, built to your exact frequency plan and rejection target.
View DatasheetsFrequency-combining assemblies built on our own filter platforms — diplexers, multi-band multiplexers and switch filter banks for splitting or combining several bands on a single port.
View DatasheetsSwitched multi-band filter banks with an integrated amplifier chain — our own cavity and interdigital filters plus RF switching and gain, built and qualified as one sealed unit, not a standalone amplifier.
View DatasheetsEvery custom RF project runs the same disciplined path — whether it's a single cavity filter or a switched multi-band assembly with an amplifier chain built in.
Frequency plan, insertion loss, rejection and mechanical constraints, worked through with the engineer who'll design the part.
Full electromagnetic simulation and topology selection before we cut any hardware.
Prototype builds to check simulated performance against what actually comes off the bench.
Full RF characterization, plus environmental and mechanical qualification when the application calls for it.
Handoff to a controlled production process, with unit-to-unit performance held to the qualified spec.
Have a spec that doesn't fit a catalog part?Send us your frequency plan and constraints — one of our engineers will reply directly, not a sales queue.
Start a Custom ProjectDesigns start from your spec, not from a fixed catalog we're trying to fit you into.
Passband and rejection tuned to the system your part is actually going into, not a generic test setup.
Small team, no account layer — you talk to the engineer who's actually designing your filter.
Nothing ships without simulation, a prototype build and full RF test against your operating conditions.
Send us a frequency plan, a datasheet you're trying to match, or just a rough idea of what you need — one of our engineers will get back to you directly.