<style type="text/css"> .wpb_animate_when_almost_visible { opacity: 1; }</style>

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).

Our BAL-0003, BAL-0006, and BAL-0010 are instrumentation grade 50 Ω input: 50 Ω output (100 Ω differential) baluns with excellent phase and amplitude match to kHz frequencies.

The high power balun variations (the BALH-0003, BALH-0006, and BALH-0010) can be used as either 1:1 or 1:2 transformers (that is either 100 Ω or 50 Ω differential/ 50 Ω or 25 Ω single ended output). These baluns have reduced insertion loss but increased output return loss at the outputs when used in a 50 Ω system. They have a higher power handling capability of up to 10 W.

Electrical Specifications - Specifications guaranteed from -55 to +100°C, measured in a 50Ω system.
Parameter Frequency Range Min Typ Max
Insertion Loss (dB) 200 kHz to 3 GHz   4.5 5.5
Input 1 dB Compression (dBm)1 37    
Nominal Phase Shift (Degrees)   180  
Amplitude Balance (dB)   ±0.1 ±0.5
Phase Balance (Degrees)   ±1 ±5
Common Mode Rejection (dB) 35 45  
Isolation (dB)   7  
VSWR (Input)   1.6  
VSWR (Output)   1.6  
Risetime /Falltime (ps)2   13  
Weight (g)   27  
1Measured in a well-heat sinked environment. 2Specified as 90%/10%. Calculated from tbalun2= (tout2 – tin2)





Start typing and press Enter to search