Broadband Balun: BAL-0067 Datasheet

An RF/microwave balun (or transformer) is a device that takes an input signal at a given impedance and outputs both the same signal and an inverted version of the signal at a (potentially) different output impedance. They are suitable for applications in differential signaling, integrated circuit testing, and general lab and experimental use.

The main figures of merit for a balun are the amplitude (ideally 0 dB across the band) and phase balance (ideally 0 degrees, meaning perfectly 180 degrees out of phase, across the band). The BAL-0026, BAL-0036, BAL-0050, and BAL-0067 are integrated power divider-inverter baluns. This means that they have a Wilkinson power divider on the common port, an inverter before the negative port, and a matched delay line on the positive port. This provides isolation between the differential ports, making these baluns very versatile tools for laboratory use.