A Dual - Polarity Impulse Radiating Antenna
نویسندگان
چکیده
We describe here the construction and testing of an IRA with dual polarity. Four feed arms are evenly spaced around the reflector, and each channel consists of a pair of arms on opposite sides of the reflector. Each channel uses a standard balun to convert the 50-ohm input impedance to 200 ohms. Since the characteristic impedance of each channel is 400 ohms, there is a 2:1 impedance mismatch at the feed point. Our measurements demonstrate that, despite the impedance mismatch, the dual-polarity IRA is a viable antenna. We present here the experimental results of the dual polarity IRA, and we compare them to those of a standard IRA-1, upon which the dual-polarity IRA is based.
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