Improved Hyperband Trifilar Coupled-line Balun for Impulse Radiating Antenna (IRA)

An improved hyperband trifilar coupled-line balun for an impulse radiating antenna (IRA) is presented in this paper. The trifilar balun is implemented in CST using the Finite Integration Technique (FIT) solver. The time domain result show well balanced excitation pulses for the IRA. From the frequency domain analysis of the balun, an amplitude balance within ±1.7 dB is attained with frequencies above 165 MHz and a phase balance within ±10° is realized between 300 MHz - 5 GHz of the frequency spectrum.