Mini-Circuits FT-1.5-1 RF Impedance Transformer 50-75 Ohm BNC 1-200MHz

Mini-Circuits FT-1.5-1 RF Impedance Transformer 50-75 Ohm BNC 1-200MHz

The Mini-Circuits FT-1.5-1 is a wideband RF impedance matching transformer designed to bridge 50-ohm and 75-ohm systems over a frequency range of 1 to 200 MHz. It provides a 1:1.5 impedance transformation ratio and passes signal in either direction — 50-to-75 ohm or 75-to-50 ohm — making it a versatile passive interface component in mixed-impedance RF setups. The compact, shielded aluminum housing keeps the design self-contained and easy to integrate at any point in a signal chain.

Specifications & What's Included

• Brand: Mini-Circuits
• Model: FT-1.5-1
• Part Number: 15542
• Revision: A16
• Impedance Ratio: 1:1.5
• Port 1: 50 ohm (standard BNC connector)
• Port 2: 75 ohm (75-ohm BNC connector — white dielectric)
• Frequency Range: 1–200 MHz
• Connector Type: BNC (one per port)
• Housing: Shielded aluminum enclosure
• Transformer only — no cables or adapters included

Applications

RF impedance matching transformers like the FT-1.5-1 are used wherever a 50-ohm instrument or source must interface with a 75-ohm cable or load — a common requirement in broadcast RF work, cable television (CATV) distribution, antenna systems, and video-over-coax testing. Test engineers use them to connect 50-ohm lab instruments (signal generators, spectrum analyzers, network analyzers) to 75-ohm coaxial infrastructure or DUT ports without introducing a severe impedance mismatch. The bidirectional design means it works equally well in the reverse direction, making it useful in both signal-injection and signal-monitoring applications. Mini-Circuits has manufactured precision RF components including transformers, mixers, and power splitters since the 1960s, and the FT series remains a standard part in RF labs and broadcast facilities.