Radiation Measurements of an Electrically Short Time-Varying Wideband VLF/LF Antenna
We present experimental results of a novel time-varying antenna to broadcast very-low-frequency (VLF, 3–30 kHz) signals. The antenna consists of a 275-m-long dipole interrupted with a high-voltage (HV) switch somewhere along the line. The switch was operated to force the charge to remain near the tip rather than reflect and return to the load. On-antenna measurements show the operation of the switch in trapping charge. Magnetic field measurements indicate that the time-varying system boosts the generated fields. Signals were detected in the far-field. The antenna demonstrated a broadband transmission and also allowed frequency hopping. The antenna was horizontal along the ground which greatly limited efficiency, and the results are discussed in this context.
Authors
- Huatsern Yeager
- Kenneth E. Miller (ORCID: https://orcid.org/0000-0002-4792-2681)
- Paul Singer
- M. B. Cohen (ORCID: https://orcid.org/0000-0002-7920-5759)
- P. Hansen (ORCID: https://orcid.org/0000-0002-5179-8265)
- Kevin Whitmore
- C. M. Lampley
- Mike Julch
Institutions
- Georgia Institute of Technology (US)
- Oklahoma City University (US)
- Eagle Harbor Technologies (United States) (US)
Publication Details
- Journal
- IEEE Transactions on Antennas and Propagation
- Published
- 2025-02-28
- DOI
- https://doi.org/10.1109/tap.2025.3540651
- Primary Topic
- Advanced Photonic Communication Systems
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Defense Advanced Research Projects Agency
- Office of Naval Research