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EXTENDED APERTURE LOG-PERIODIC AND QUASI-LOG-PERIODIC ANTENNAS AND ARRAYS
EXTENDED APERTURE LOG-PERIODIC AND QUASI-LOG-PERIODIC ANTENNAS AND ARRAYS
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机译：扩展孔径对数周期和准对数周期天线和阵列
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摘要
An extended aperture log-periodic antenna in which each element is capacitively loaded to tune out a portion of the element's inductive reactance, so that at any frequency within the antenna's frequency range series resonance occurs at an element whose physical length exceeds one-fourth free space wavelength of the applied signals. An extended aperture quasi-log-periodic antenna is also disclosed, in which only selected elements are capacitively loaded resulting in increased beam sharpness which is not in a true log-periodic relationship even though the antenna impedance remains constant over the antenna's entire operating range, as in a true log-periodic antenna. Linear and circular arrays, employing capacitively loaded elements, are also disclosed.
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