Experimental results have been obtained on a planar multioctave bandwidth flared microstrip slot.... more Experimental results have been obtained on a planar multioctave bandwidth flared microstrip slot. When crossed, the element is capable of horizontal, vertical, or circular polarization. A design was fabricated and measurements were taken to define the performance. The input impedance and radiation characteristics are shown to have a broadband response when configured as a cavity-backed element.
A method for determining the RF performance from antenna radome configurations based on a frequen... more A method for determining the RF performance from antenna radome configurations based on a frequency-domain finite-element method is presented. The application of this analysis on the design of antenna arrays in aircraft leading edges and radar radomes is discussed. The modeled antenna array elements can be driven with arbitrary amplitude and phase weighting for sidelobe tapering and phased steering of the pattern. The understanding of near-field radiation and coupling interactions is an important design aid. Physical phenomena such as resonances are observed in the predicted near-field results. >
1988 Ieee Ap S International Symposium Antennas and Propagation, 1988
Experimental results have been obtained on a planar dual polarized multioctave flared slot antenn... more Experimental results have been obtained on a planar dual polarized multioctave flared slot antenna. A design was fabricated and measurements were taken to characterize the performance over an extended frequency band. The input impedance and radiation characteristics of a cavity-backed element are shown to have a bandwidth performance that is increased previously published results.<<ETX>>
Proceedings of the Ieee National Radar Conference, Mar 29, 1989
The authors address the problem of providing an aperture that is consistent in its operational ba... more The authors address the problem of providing an aperture that is consistent in its operational bandwidth and grating lobe requirements and is configurable as a phased array of transmit/receive (T/R) modules. The design and performance of wideband phased-array apertures and an active line array suited for multifunction system applications are discussed. It is shown that radar performance in multifunction systems
The authors present a volume integral formulation in conjunction with a method of moments solutio... more The authors present a volume integral formulation in conjunction with a method of moments solution for electromagnetic scattering from two- and three-dimensional homogeneous dielectric printed circuit substrates. The theory for printed circuits consisting of dielectric substrates and conducting surfaces is presented. The TE scattering from a dielectric cylinder and a dielectric sheet are computed and compared to other numerical results. The results for electromagnetic scattering from a three-dimensional dielectric cube are compared to other results.
Antennas and Propagation Society International Symposium, 1988
The results of a two-dimensional finite-element/boundary-element time-harmonic analysis of an eig... more The results of a two-dimensional finite-element/boundary-element time-harmonic analysis of an eight-element stripline notch phased array are presented. The hybrid finite-element/boundary-element method can be used for both near and far-field radiation and scattering analysis. The boundary-element method is used for the exterior far-field region, and the finite-element method is used for the near-field antenna/scatterer region. Predictions are given and compared with
Experimental results have been obtained on a planar multioctave bandwidth flared microstrip slot.... more Experimental results have been obtained on a planar multioctave bandwidth flared microstrip slot. When crossed, the element is capable of horizontal, vertical, or circular polarization. A design was fabricated and measurements were taken to define the performance. The input impedance and radiation characteristics are shown to have a broadband response when configured as a cavity-backed element.
A method for determining the RF performance from antenna radome configurations based on a frequen... more A method for determining the RF performance from antenna radome configurations based on a frequency-domain finite-element method is presented. The application of this analysis on the design of antenna arrays in aircraft leading edges and radar radomes is discussed. The modeled antenna array elements can be driven with arbitrary amplitude and phase weighting for sidelobe tapering and phased steering of the pattern. The understanding of near-field radiation and coupling interactions is an important design aid. Physical phenomena such as resonances are observed in the predicted near-field results. >
1988 Ieee Ap S International Symposium Antennas and Propagation, 1988
Experimental results have been obtained on a planar dual polarized multioctave flared slot antenn... more Experimental results have been obtained on a planar dual polarized multioctave flared slot antenna. A design was fabricated and measurements were taken to characterize the performance over an extended frequency band. The input impedance and radiation characteristics of a cavity-backed element are shown to have a bandwidth performance that is increased previously published results.<<ETX>>
Proceedings of the Ieee National Radar Conference, Mar 29, 1989
The authors address the problem of providing an aperture that is consistent in its operational ba... more The authors address the problem of providing an aperture that is consistent in its operational bandwidth and grating lobe requirements and is configurable as a phased array of transmit/receive (T/R) modules. The design and performance of wideband phased-array apertures and an active line array suited for multifunction system applications are discussed. It is shown that radar performance in multifunction systems
The authors present a volume integral formulation in conjunction with a method of moments solutio... more The authors present a volume integral formulation in conjunction with a method of moments solution for electromagnetic scattering from two- and three-dimensional homogeneous dielectric printed circuit substrates. The theory for printed circuits consisting of dielectric substrates and conducting surfaces is presented. The TE scattering from a dielectric cylinder and a dielectric sheet are computed and compared to other numerical results. The results for electromagnetic scattering from a three-dimensional dielectric cube are compared to other results.
Antennas and Propagation Society International Symposium, 1988
The results of a two-dimensional finite-element/boundary-element time-harmonic analysis of an eig... more The results of a two-dimensional finite-element/boundary-element time-harmonic analysis of an eight-element stripline notch phased array are presented. The hybrid finite-element/boundary-element method can be used for both near and far-field radiation and scattering analysis. The boundary-element method is used for the exterior far-field region, and the finite-element method is used for the near-field antenna/scatterer region. Predictions are given and compared with
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Papers by Mark Povinelli