摘要 |
PROBLEM TO BE SOLVED: To use components relating to an antenna of a base station using a narrow electromagnetic beam in common by employing plural output signals with a power level substantially equal to each other whose phases differ from each other and amplifying each output signal independently. SOLUTION: An antenna system 100 has N-sets of wide beam antenna elements connecting to a power supply network 112, which is provided with N-sets of input ports and N-sets of output ports 115. When an input signal is applied to one of the input ports 113, plural output signals are fed to N-sets of the output ports with an equal level and have a phase zigzag arrangement according to a phase relation defined in advance. The network 112 provides an output at least two output signals having a phase zigzag arrangement according to a phase relation defined in advance with a sufficiently equal power level. Each output signal has each phase zigzag arrangement with a relation of (±(2K-1)×180 deg.)/N, where K is a beam number.
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