--- type: product schema_version: 1 stock_number: "74082-1" canonical_url: "https://www.artisantg.com/74082-1/SMT-SMI2040" json_url: "https://www.artisantg.com/74082-1/SMT-SMI2040.json" generated_at: "2026-11-07T21:21:50.978Z" last_updated: "2026-10-14T13:00:51.160-05:00" --- # SMT SMI2040 3-Port Broadband Connectorized Isolator/Circulator _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: SMT - Model: SMI2040 - Condition: Used and in Excellent Condition - Price: $115.00 USD - Availability: In stock, 1 available - Warranty: 1-Year Warranty with 30-Day Return Guarantee - ITAR restricted: No - Shipping weight: 1.5 lb, estimated - Shipping dimensions: 8X8X3 in, estimated ## Categories - Test Equipment > Electrical Test > Isolators (primary) ## Details ### Configuration - Connector Orientation:      - Port 1: SMA Female      - Port 2: SMA Female      - Port 3: Terminated ## Overview A passive, 3-port, connectorized ferrite device configurable as an isolator or circulator for the 2.0-4.0 GHz frequency range. It provides high isolation to protect source components from reflected signals and low insertion loss for signal integrity. Interfacing via three SMA female coaxial connectors, it is integrated into RF/microwave systems. Common applications include amplifier protection, duplexing in transceivers, and signal routing in test benches, radar, and electronic warfare (EW) systems. ## Function Enables unidirectional signal transmission, isolates RF components from reflected power, and provides three-port signal routing within a broadband frequency range using SMA connectors. ## Platform This RF component functions as a non-reciprocal ferrite device, directing broadband electromagnetic waves sequentially between three ports or isolating one port from reflections. It's engineered for integration within RF/microwave communication systems, radar front-ends, and test instrumentation platforms. Connecting via standard RF coaxial connectors, it interfaces with antennas, power amplifiers, mixers, and transceivers. Primary applications include VSWR protection, duplexing for shared antenna TX/RX paths, signal routing, and ensuring system stability in high-frequency transceiver architectures. ## Application Used in RF/microwave systems for non-reciprocal signal routing, protecting active components like power amplifiers and oscillators from damaging reflected power, and improving system stability. Facilitates duplexing in antenna systems and serves as a critical element for enhancing impedance matching and reducing intermodulation distortion in broadband communication links and radar front-ends. Essential for isolation in measurement setups. ## Accessories Requires SMA connectors for RF ports, typically 3 connectors (one input, two output ports), mounted with female SMA connectors 50 ohm, frequency range 0.5 to 4.0 GHz; requires precise RF test equipment or integration into broadband RF systems; may need torque wrenches for SMA connector installation; no additional mainframe or chassis needed. ## Interface RF input port (SMA female), RF output port (SMA female), isolated port (SMA female); 2.0 to 4.0 GHz frequency range; 20 dB minimum isolation; 0.5 dB maximum insertion loss; 1.25:1 maximum VSWR; handles up to 10W average RF power; threaded SMA connectors with gold-plated center pins; compatible with 50O impedance systems; requires no external bias or control signals; passive device needing no power source. ## Images - - - -