Push-pull amplifier for an active dipole antenna

摘要

In the case of a push-pull amplifier for active dipole antennas, in the case of which amplifier each dipole half is connected directly to the input of one of the two amplifier elements, and the outputs of these two amplifier elements are connected to a balancing element, and in the case of which amplifier the two amplifier elements are fitted directly on the dipole halves such that they are isolated from one another, the zero potential connections (which are common to the input and output) of these two amplifier elements each being directly connected to the base point of the associated dipole half, while the input connections are in each case connected to the base points of the opposite dipole halves and the outputs are connected via parallel wire lines or coaxial lines of electrically identical length to the balanced input of the balancing element, the balancing element is also arranged directly on one dipole half and only that line which leads to the balancing element from the amplifier element arranged on the other dipole half is constructed such that the parallel wire line has a high resistance for rectified currents and the coaxial line has a high impedance for currents on the outer conductor.