RF Circuit Design

From Low Frequency to Microwave, we provide custom wireless / RF circuit design solutions tailored to your specific requirements and needs, or modifications to existing designs. We have experience with a wide variety of transmitter, receiver, and transceiver solutions in a range of frequencies and standards, including broadcast, ISM, WLAN, cellular, avionics, and medical.

We can tackle a project from many different starting points: concept, prototype, or production reworks. When starting from a concept, we will first develop a system-level block diagram, and drill down into the RF circuit design. If needed, we can also design any antennas required. PCB design for prototypes is also an in-house service, allowing us to supervise the layout for good RF performance. At this phase, we can build a number of prototypes and test the system performance. After first revisions, we can test for FCC/EMI specification conformance.

RF circuit design is a specialty, not a sideline. SRF has been doing rf design since 2006 – transmitters, receivers, antennas, PCB layout, full wireless systems. If your circuit doesn’t work, doesn’t exist yet, or has a part that’s no longer made, that’s the kind of problem we solve.

Call us at (919) 374-0773 to get started.

When you need an RF circuit designed from scratch

Blank schematic. New product. You know what it needs to do – you need someone to design the RF side of it.

Full rf circuit design from concept through production-ready schematics and PCB layout
Transmit/receive chains, oscillators, filters, modulators, couplers – microwave frequencies included
Antenna design: LPDA, Yagi, monopole, PIFA – matched to your system architecture and link budget
System-level design: spread spectrum, RFID, radar, custom wireless architectures
15+ issued RF patents on our principal engineer’s record – we’ve done this before

When your RF circuit isn’t performing right

Transmit range is too short. Receiver performance is off. Something is wrong and you haven’t been able to pin it down.

RF circuit troubleshooting – we find the actual root cause, not just the symptom
Transmit range problems: output power, antenna mismatch, spurious emissions, path loss miscalculation
Receiver performance issues: sensitivity, noise figure, selectivity, desensitization
RF circuit modification to correct the problem – not a workaround, a fix
We use ADS, LTspice, and lab measurement to verify – not guesswork

When your RF component is discontinued

End-of-life notice landed. The part that made your design work is gone. You need a modern replacement that still meets spec.

End-of-life RF component replacement – full redesign around a modern equivalent
Performance verification that the new design still meets original specifications
PCB layout updates in Altium Designer or Siemens PADS
Supply chain disruptions don’t have to mean a product redesign from scratch – often the RF circuit modification is more targeted than you think