--- type: product schema_version: 1 stock_number: "51817-1" canonical_url: "https://www.artisantg.com/51817-1/L-3-4914" json_url: "https://www.artisantg.com/51817-1/L-3-4914.json" generated_at: "2026-11-07T13:55:27.678Z" last_updated: "2026-10-14T13:00:51.160-05:00" --- # L-3 / Narda 4914 4-8 GHz Ferrite Isolator _Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._ ## Summary - Manufacturer: L-3 - Model: 4914 - Condition: Used and in Excellent Condition - Price: $195.00 USD - Availability: In stock, 5 available - Warranty: 1-Year Warranty with 30-Day Return Guarantee - ITAR restricted: No - Shipping weight: 1 lb, estimated - Shipping dimensions: 8X8X3 in, estimated ## Categories - Test Equipment > Electrical Test > Isolators (primary) ## Details ### Configuration - Frequency: 4-8GHz - Isolation: 18dB - Insertion Loss (dB Max.): ~0.5dB - VSWR (Max.): 1.3:1 - Peak Power, up to 50W (with specified VSWR limits) - Average Power (Watts) - Forward: 15 - Reverse: 1 - Temperature Range (°C): -20 to +65 ## Overview The equipment functions as a ferrite isolator, attenuating microwave signals in the reverse direction while providing low insertion loss in the forward direction. It operates within a specified frequency range, utilizing a waveguide or coaxial interface for signal transmission. Connection is achieved through waveguide flanges or coaxial connectors. Typical applications include protecting sensitive microwave components from reflected signals in test setups and communication systems. ## Function Provides unidirectional signal transmission, isolating the source from load variations. Operates in the specified frequency band with low insertion loss and high isolation. Handles specified power levels and minimizes signal reflections. Connects via coaxial connectors. Used in RF and microwave systems to improve stability and performance. ## Platform Operates in waveguide transmission systems requiring unidirectional signal propagation, typically integrated between microwave generators and loads, antennas, or test equipment to prevent reflected power damage. Designed for standard rectangular waveguide flanges with precise mechanical tolerances for low VSWR connections. Functions within high-frequency RF and microwave circuits where signal isolation is critical, commonly found in radar systems, satellite communication equipment, and laboratory test setups requiring protection of sensitive microwave sources from load variations. ## Application Utilized in RF and microwave systems to protect sensitive active components such as oscillators and amplifiers from damaging reflected power and load pulling, thereby ensuring signal stability and preventing intermodulation distortion. Common uses include test and measurement setups, radar systems, satellite communications, and high-power amplifier chains where unidirectional signal flow and impedance matching are critical for optimal system performance and longevity. ## Accessories Requires coaxial RF cables with N-type male connectors for input/output ports. Compatible with systems having 50O impedance. Operating in WR-90 waveguide band (8.2-12.4 GHz), this isolator needs appropriate waveguide-to-coaxial adapters if interfacing with waveguide systems. May require heat sink for high-power applications. Standard rack mounting brackets available for installation in 19" equipment racks. ## Interface This is a passive, two-port device. Port J1 (Input) is an SMA female coaxial connector. Port J2 (Output) is an SMA female coaxial connector. No external power, mainframe, or accessories are required for operation. ## Images - - - -