Optimized Wideband Impedance Matching Balun for Conducting Two-Arm Antennas

Figure 1

Split coaxial balun with a step-transition of the inner conductor: (a) waveguide transition from coaxial line to double-slotted coaxial line and (b) the same transition terminated with a short circuit at the double-slotted line side.

(a)

(b)