What type of balun (balanced-to-unbalanced) is used in high frequency applications?
A. Transformer type balun
B. A specially configured coaxial transmission line
C. A specially configured parallel-wire line
D. A λ/2 transformer balun
A. Transformer type balun
B. A specially configured coaxial transmission line
C. A specially configured parallel-wire line
D. A λ/2 transformer balun