--- type: product schema_version: 1 stock_number: "93942-1" canonical_url: "https://www.artisantg.com/93942-1/Frequency-Electronics-AMF-5391" json_url: "https://www.artisantg.com/93942-1/Frequency-Electronics-AMF-5391.json" generated_at: "2026-11-07T07:30:19.998Z" last_updated: "2026-10-14T13:00:51.160-05:00" --- # Frequency Electronics AMF 5391 Waveguide-to-Coaxial Adapter _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: Frequency Electronics - Model: AMF 5391 - Condition: Used and in Excellent Condition - Price: Quote only - Availability: In stock - Warranty: 1-Year Warranty with 30-Day Return Guarantee - ITAR restricted: Yes - Shipping weight: 1.5 lb, estimated - Shipping dimensions: 8X8X3 in, estimated ## Categories - Test Equipment > Electrical Test > Adapters (primary) - Military and Embedded Equipment > Couplers / Terminators - Military and Embedded Equipment > Other Milspec ## Overview Bidirectional transition device designed to facilitate signal propagation between waveguide and coaxial transmission lines. Functions with microwave frequency signals, providing impedance matching to minimize reflection and insertion loss. Interfaces with standard waveguide flanges on one end and coaxial connectors (likely SMA or N-type) on the opposite end. Typically constructed of precision-machined aluminum or brass with gold or silver plating for conductivity. Used in radar systems, satellite communications, test equipment setups, and microwave transmission networks where conversion between transmission line types is necessary. Operates in specific frequency bands determined by waveguide dimensions. ## Function Provides impedance-matched transition between rectangular waveguide and coaxial transmission lines, maintaining signal integrity across microwave frequency bands. Features precision-machined waveguide flange interface with threaded coaxial connector, enabling seamless integration between waveguide components and coaxial test equipment, amplifiers, or measurement systems. Designed for low VSWR performance with minimal insertion loss, supporting broadband operation while preserving phase characteristics. Typically constructed with brass or aluminum housing and PTFE dielectric materials for environmental stability and consistent electrical performance in laboratory and field applications. ## Platform Designed to provide seamless RF signal transition between rectangular waveguide transmission systems and coaxial cable interfaces. Operates across specific frequency bands determined by waveguide dimensions, typically in microwave and millimeter-wave spectrum. Features precision-machined waveguide flange conforming to standard interfaces (WR-series) with integrated probe coupling mechanism. Coaxial port utilizes standard RF connectors (Type-N, SMA, or 2.92mm) with controlled impedance matching. Incorporates quarter-wave transformer sections or ridged waveguide transitions for optimal VSWR performance. Compatible with test instrumentation, radar systems, satellite communications equipment, and laboratory measurement setups. Interfaces directly with spectrum analyzers, network analyzers, signal generators, and waveguide-based antenna systems requiring coaxial feeds. ## Application Designed for seamless transition between waveguide signal transmission and coaxial line interfaces, this adapter operates within microwave and millimeter-wave hardware platforms. It enables integration of rectangular waveguide systems with coaxial components such as antennas, test equipment, and signal processors. Typical applications include radar systems, satellite communication links, microwave test setups, and high-frequency signal routing, ensuring minimal insertion loss and reflection across designated frequency bands. ## Accessories Waveguide-to-coaxial adapter typically requires compatible waveguide flange sizes (e.g., WR series such as WR-75, WR-90) and coaxial connectors (Type N commonly used) matching the frequency range; constructed from aluminum or copper alloy; no dedicated mainframe or chassis required; connectors include rectangular waveguide input flange and coaxial output (Type N female or male, 50 ohm), supporting frequency range roughly 1.7 to 18 GHz (depending on waveguide size); physical interface includes precision waveguide flange dimensions and standard coaxial connector with threaded coupling. ## Interface WR-28 waveguide flange interface (0.320" x 0.640" aperture) for Ka-band operation (26.5-40 GHz), female 2.92mm coaxial connector output, requires four mounting screws for waveguide flange attachment, gold-plated center conductor, stainless steel body construction, maximum VSWR 1.25:1, insertion loss typically 0.2 dB, power handling 5W average/500W peak, temperature range -55°C to +85°C ## Images - - - -