| タイトル | Lithographic spiral antennas at short wavelengths |
| 著者（英） | Sauvageau, J. E.; Grossman, E. N.; Mcdonald, D. G. |
| 著者所属（英） | NASA Goddard Space Flight Center; NASA |
| 発行日 | 1991-12-16 |
| 言語 | eng |
| 内容記述 | We have extended the high efficiency of lithographic antennas to mid-infrared wavelengths. Pattern measurements made at 9.5/zm wavelength on a 65 deg, self-complementary, spiral antenna exhibit a ratio of response to orthogonal linear polarizations of 1.35 dB, a beamwidth of 85 deg (3 dB full width), a directivity of 8.2 dB, and surprisingly, a close resemblance to the theoretical pattern for a 65 deg spiral in free space. Direct detection measurements made with an ambient temperature blackbody source yield an antenna efficiency of 52 +/- 7 percent, when corrected for incomplete filling of the antenna beam by the source, at a mean effective wavelength of 19 micron. |
| NASA分類 | ELECTRONICS AND ELECTRICAL ENGINEERING |
| レポートNO | 93A32123 |
| 権利 | Copyright |
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