Compression and Radiation of High-Power Short Rf Pulses. Ii. A Novel Antenna Array Design With Combined Compressor/Radiator Elements

Abstract

Abstract-The paper discusses the radiation of compressed high power short RF pulses using two different types of antennas: (i) A simple monopole antenna and (ii) a novel array design, where each of the elements is constructed by combining a compressor and a radiator. The studies on the monopole antenna demonstrate the possibility of a high power short RF pulse's efficient radiation even using simple antennas. The studies on the novel array design demonstrate that a reduced size array with lower pulse distortion and power decay can be constructed by assembling the array from elements each of which integrates a compressor and a radiator. This design idea can be used with any type of antenna array; in this work it is applied to a phased array.

The Exact Absorbing Conditions Method in the Analysis of Open Electrodynamic Structures: Circular and Coaxial Waveguides

“…It can be now used for most problems of the EAC-method. Conceptually, the proof of the equivalency completes the mathematical justification of the corresponding approach, whose computational efficiency has already been confirmed in a series of works [3,8,22,[24][25][26][27][28][29][30].…”

“…The method utilizing the exact absorbing conditions for the artificial boundaries that truncate an unbounded domain of computation [1-9, 20, 21] is outnumbered by the classical approximate approaches. However, testing numerical experiments as well as a series of physical and applied results obtained with the help of this method (see, e.g., [3,5,8,[21][22][23][24][25][26][27][28][29][30]) shows its evident potential, especially, for obtaining reliable numerical data on space-time and space-frequency electromagnetic field transformations in open waveguide, periodic, and compact resonators.…”

Exact Absorbing Boundary Conditions for Periodic Three-Dimensional Structures: Derivation and Implementation in Discontinuous Galerkin Time-Domain Method

“…One can also use FFT-based acceleration techniques for fast computation of the (nonlocal) temporal convolutions [31]- [34]. These improvements make the EACs an attractive alternative to the PML, especially in simulations that require high accuracy and/or extended time marching [35]- [37]. It should be noted here that the boundaries, where the EACs are enforced, have to coincide with coordinate planes (for example, plane surfaces in Cartesian coordinate system or spherical surfaces in spherical coordinate system).…”

Focusing Properties of Ultra Wideband Transient Arrays

“…Different antennas including arrays, reflectors, and dielectric lens antennas as well as Fresnel zone plate antennas have been used for this purpose [1][2][3][4][5][6][7]. Focused array antennas based on Ultra-Wide-Band (UWB) impulse waveforms can highly concentrate electromagnetic energy into small regions by controlling the timing of pulses radiated by each element [8][9][10][11][12][13][14][15][16]. Better performance compared to narrowband arrays can be achieved in terms of higher angular resolution and increasing the peak power delivered to the focused region.…”