File:Wwvh-15MHz.jpg
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Captions
Captions
15 MHz antenna array. Two half-wave vertical dipoles separated by a quarter-wave length and driven 90 degrees out of phase.
Summary
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| Description |
中文（繁體）：15MHz的天线阵列。两个半波的垂直偶极子被四分之一波的长度分开，擁90度的相位差。 |
| Date | |
| Source | https://www.nist.gov/pml/time-and-frequency-division/time-services/wwvh-photo-gallery |
| Author | The United States National Institute of Standards and Techology |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:25, 18 March 2022 | | 600 × 729 (80 KB) | HAM-Koua (talk | contribs) | Uploaded a work by The United States National Institute of Standards and Techology from https://www.nist.gov/pml/time-and-frequency-division/time-services/wwvh-photo-gallery with UploadWizard |
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