50 Ohm SMA Isolators – RF & Microwave 1–26.5 GHz

Bracke Manufacturing offers a comprehensive selection of 50 Ohm SMA isolators designed to support high-performance RF and microwave systems across a wide frequency spectrum. Our SMA isolators are available in frequency ranges from 1 GHz to 26.5 GHz, with models delivering up to 150 Watts of power handling. Engineered to provide consistent isolation (15 to 20 dB min), low insertion loss, and excellent VSWR performance, these components are ideal for protecting sensitive circuitry, minimizing signal reflection, and ensuring optimal signal flow in one direction. With SMA connectors and compact housings, Bracke isolators are a reliable solution for communication, radar, satellite, and test applications.

Complete Your RF System with High-Performance Isolators and Components

Bracke Manufacturing is your trusted source for precision-engineered RF isolators, offering a wide selection of 50 Ohm SMA isolators covering frequency ranges from 1 GHz to 26.5 GHz. To support complete system integration, our RF product portfolio also includes SMA circulators, bias tees, rotary joints, and low PIM coaxial cable assemblies—everything you need to ensure optimal signal flow and protect sensitive components in high-performance environments. All products are backed by expert support, fast turnaround, and proven reliability.

Frequently Asked Questions – SMA Isolators

Q: What is an RF isolator, and how does it work?
A: An RF isolator is a two-port passive device designed to allow signal flow in one direction only—typically from Port 1 to Port 2—while blocking and absorbing any reflected power coming from Port 2. This non-reciprocal function helps protect sensitive upstream components like amplifiers and signal sources from damage caused by signal reflections or mismatched loads.

Q: How is an isolator different from a circulator?
A: An isolator is essentially a circulator with one port terminated in a matched resistive load. While a circulator routes signals between three ports in a circular fashion, an isolator simplifies this into a one-way path between two ports. If your design requires only forward signal transmission with protection against reverse power, an isolator is the right choice.

Q: When should I use an isolator instead of a circulator?
A: Use an isolator when your application involves two ports—such as a source and a load—and you want to prevent reflected power from returning to the source. Isolators are commonly used in transmit chains, amplifier protection, and test setups where signal integrity and equipment safety are critical. Choose a circulator when you need to manage signal flow between three components, like a transmitter, antenna, and receiver.

Q: What are common applications for SMA isolators?
A: SMA isolators are used across a variety of RF and microwave systems where signal directionality and protection are important. Applications include wireless transmitters, radar systems, lab test benches, satellite equipment, and communication systems. Bracke’s SMA isolators are available for 50 Ohm systems in frequency ranges from 1 GHz to 26.5 GHz with models offering up to 150 Watts of power handling.

Q: What other Bracke components work well with SMA isolators?
A: Bracke Manufacturing offers a range of RF components that integrate seamlessly with SMA isolators, including:

• Coaxial Cable Assemblies – High-performance, SMA-terminated cables for minimal signal loss

• Attenuators – To manage power levels and protect downstream components

• RF Adapters – For adapting SMA connections to other formats like N-Type, 2.92mm, or BNC

• Bias Tees – For injecting DC power onto RF lines without disrupting signal transmission

• SMA Circulators – When you need three-port routing capability in addition to protection

Q: What are the key performance specs to evaluate when choosing an isolator?
A: Important parameters include:

• Frequency Range – Ensure it matches your system’s operating band

• Isolation – Higher dB values indicate better reverse signal suppression

• Insertion Loss – Lower values mean less signal attenuation in the forward path

• VSWR (Voltage Standing Wave Ratio) – A low VSWR (closer to 1:1) indicates excellent impedance matching

• Power Handling – Make sure the isolator can support your system’s RF power output

Q: Are Bracke’s SMA isolators available for fast delivery?
A: Yes. Bracke Manufacturing maintains a ready-to-ship inventory of SMA isolators and other RF components. Most models are available for immediate shipment, with full technical specifications, drawings, and pricing accessible on our website for fast and easy ordering.

When you choose Bracke Manufacturing for your isolators, you’re partnering with a trusted leader in RF and microwave innovation. Led by industry veteran Lawrence Pasternack, Bracke is committed to delivering dependable, in-stock solutions with competitive pricing and fast turnaround times. Our isolators—along with adapters, attenuators, cable assemblies, terminations, and more—are in stock and ready to ship.

Have questions or need help selecting the right component? Contact our team at (949) 756-1600 or email sales@brackemfg.com.

Browse our wide selection of RF and Microwave products available in our online store. Most orders placed by 4pm PST ship the same day.