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The drawing shows two half-wave dipole antennas connected in parallel through a pair of transmission lines measuring lambda over 2. Antenna 1 has a load impedance labeled Z sub L sub 1 equals 75 ohms and connects over line 2 to node C, while antenna 2 has a load impedance labeled Z sub L sub 2 equals 75 ohms, and connects over line 3 to node D. The combination is connected to a feed transmission line of length lambda over 2 and input impedance Z sub in, labeled Line 1 between nodes A, B and C, D. The generator has a 250 V sinusoidal voltage source in series with a 50-ohm resistor.