| 摘要 |
Compact ground-plane antennas having a plurality of sub-elements disposed in a radially symmetric pattern above a ground-plane. Each sub-element is similarly shaped and has a total lenght of approximately one-quarter wavelength at the corresponding operating frequency. The present antennas exhibit a significant reduction in size and improved current sharing to permit better control of the antenna characteristics; in particular the antenna patterns and drive point impedance.
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