Driven, metamaterial-inspired, 3D magnetic EZ antenna for mesoband HPM applications

Ng, Jackson; Ziolkowski, Richard W.; Tyo, J. Scott; Skipper, Michael C.; Abdalla, Michael D.

doi:10.1109/aps.2012.6349375

Cited by 2 publications

(2 citation statements)

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“…In our experience we have found that the former method is better suited for applications under 150 MHz when space is extremely valuable, while the latter is suited for higher frequency applications because of the ability to store more energy and achieve higher gain for a given volume. Using the second method in our application we have previously presented work discussing a quarter-wave switched wave oscillator (SWO) source, sometimes referred to as a MATRIX source [2], [7], [8].…”

Section: Introductionmentioning

confidence: 99%

“…One specific design of MTM-inspired antennas is the "EZ antenna", which utilizes a capacitively loaded loop (CLL) placed in the near-field of a magnetic dipole antenna. These antennas have been shown to have efficiencies of greater than 90% while maintaining ka < 0.5 [12], [16], and have been adapted to a SWO source in our earlier work [7], [8]. Here we further shrink the size of the CLL by using a spherical shape instead of an extruded rectangle, we demonstrate the performance of the EZ antenna over a very small ground plane (λ/4-diameter), and we integrate the antenna with a pressurized radome to increase the maximum voltage above the 10 kV that we demonstrated previously.…”

Section: Introductionmentioning

confidence: 99%

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Integration and Operation of an Electrically Small Magnetic EZ Antenna With a High-Power Standing Wave Oscillator Source

Ramon

Tyo

Ziolkowski

et al. 2016

Antennas Wirel. Propag. Lett.

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The efficacy of the three-dimensional, rectangular magnetic EZ antenna for use with mesoband high power microwave (HPM) sources has been demonstrated previously. It overcomes the typical bulky and massive impedance matching components found currently in most HPM systems, making it an attractive option when space is very limited. However, its extremely compact nature presents practical challenges when dealing with extremely high power sources due to the associated local field enhancements near the feed and the near field resonant parasitic element. This letter presents a fully integrated, highvoltage source and radiating system that has several improvements in the antenna, source, and power system that have not before been demonstrated. The full system includes a ferroelectric generator, standing wave oscillator source, and electrically small antenna (ka = 0.37) operating at 510 MHz that can be packaged inside a 15-cm diameter tube. This small diameter results in a quarter-wavelength-diameter ground plane, and the effects of this small ground plane on the radiation characteristics are explored. The development of a pressurized radome allows for operation at 73.6 kV, significantly higher than previous studies. The results in this letter demonstrate that several disparate parts can be brought together to make a self-contained, compact, HPM system. the performance characteristics obtained through numerical simulations.

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Section: Introductionmentioning

confidence: 99%