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  • 1
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    A corrugated horn antenna using V-shape corrugations (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Corrugated horns use corrugations on the E-plane walls that are operating in the cutoff condition. In this paper, attention is focused on replacing the rectangular shaped corrugation with a V-shaped corrugation. The properties of the V corrugations are obtained using an integral equation solution; the results of the computational studies indicate that for operation of the V corrugations in the forbidden zone the depth of the corrugations lie between 0.3125 to 0.625 times the wavelength in contrast to the rectangular corrugations where the corresponding depth is 0.25 to 0.5 times the wavelength. The radiation patterns and impedance of two identical rectangular horns with corrugated E-plane walls using either V or rectangular corrugations are directly compared.
    Keywords: COMMUNICATIONS AND RADAR
    Type: IEEE Transactions on Antennas and Propagation; AP-23; Jan. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    The corrugated horn as an antenna range standard. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The corrugated horn is discussed as is a valuable tool for use in microwave pattern ranges. It has the properties of concentrated energy in the main beam, low backlobes, high efficiency, almost monotonic amplitude, and phase radiation patterns which make the corrugated horn useful for a source antenna in a pattern range and also as a possible standard antenna for calibration purposes.
    Keywords: ELECTRONIC EQUIPMENT
    Type: IEEE Transactions on Antennas and Propagation; AP-21; July 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Properties of cutoff corrugated surfaces for corrugated horn design (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Corrugated horns involve a junction between the corrugated surface and a conducting ground plane. Proper horn design requires an understanding of the electromagnetic properties of the corrugated surface and this junction. An integral equation solution has been used to study the influence of corrugation density and tooth thickness on the power loss, surface current, and the scattering from a ground plane/corrugated surface junction.
    Keywords: COMMUNICATIONS
    Type: IEEE Transactions on Antennas and Propagation; AP-22; Mar. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    High performance S-band horn antennas for radiometer use (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Horn antennas of four types: pyramidal corrugated, conical corrugated, pyramidal dual mode and conical dual mode, have been constructed and evaluated for use as S-band radiometer antennas. Each of the structures is described and radiation patterns and impedance and resistive loss measurements including a layer of foreign material on a thin radome, are presented. A precision method for determining reflection losses is described using a multiprobe reflectometer technique. The same technique is also applied to the measurement of resistive losses by closing the ends of the antennas with short circuit plates and determining the losses from an accurate measurement of the reflection coefficient. The radiation patterns were recorded with the aid of a real-time digital computer. The stored patterns were then processed to yield gain and beam efficiency. It was concluded that it is possible to design a highly efficient antenna for radiometer use and to measure its parameters precisely. However, it was found that it is necessary to modify the conventional definition of beamwidth somewhat if this term is to be meaningful for radiometer applications.
    Keywords: COMMUNICATIONS
    Type: NASA-CR-2133
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Horn antenna with v-shaped corrugated surface (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Corrugated shape is easily machined for millimeter wave application and is better suited for folding antenna designs. Measured performance showed ""V'' corrugations and rectangular corrugations have nearly the same pattern beamwidth, gain, and impedance. Also, ""V'' corrugations have higher relative power loss.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-11112
    Format: application/pdf
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  • 6
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    A parametric study of cut-off corrugated surface properties (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Corrugated horns involve a junction between the corrugated surface and a conducting groundplane. Proper horn design requires an understanding of the electromagnetic properties of the corrugated surface and this junction. Therefore, an integral equation solution has been used to study the influence of corrugation density and shape on the power loss. Surface current, and the scattering from a groundplane-corrugated surface junction. Both square and vee shape corrugations have been considered over the range of corrugation depths where the surface acts as a cut-off corrugated surface.
    Keywords: COMMUNICATIONS
    Type: NASA-CR-2317
    Format: application/pdf
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