: Investigations have continued into developing design criteria for a dielectric waveguide line s... more : Investigations have continued into developing design criteria for a dielectric waveguide line source antenna. The Marcatili analysis has proven to be a reliable guide for the transmission line design. There is, however, no practical design information available permitting the synthesis of a symmetrical amplitude taper along a grooved dielectric waveguide antenna. This investigation presents a measurement procedure that will permit a correlation between the radiating element physical configuration and the radiation properties. Additional data for various slot geometries will continue to be accumulated. A theoretical and emperical relationship will then be made so as to further relate the slot geometry to radiation characteristics. Our investigations have demonstrated that a non-metallic grooved dielectric waveguide can be made to radiate with a well-formed antenna pattern resulting from an exponential amplitude taper. This effort will be extended to permit the design of a lower sid...
Presented at the Army Sci Conf 15 18 Jun 1982, Jun 18, 1982
Abstract : Investigations have continued into developing design criteria for a dielectric wavegui... more Abstract : Investigations have continued into developing design criteria for a dielectric waveguide line source antenna. The Marcatili analysis has proven to be a reliable guide for the transmission line design. There is, however, no practical design information available permitting the synthesis of a symmetrical amplitude taper along a grooved dielectric waveguide antenna. This investigation presents a measurement procedure that will permit a correlation between the radiating element physical configuration and the radiation properties. Additional data for various slot geometries will continue to be accumulated. A theoretical and emperical relationship will then be made so as to further relate the slot geometry to radiation characteristics. Our investigations have demonstrated that a non-metallic grooved dielectric waveguide can be made to radiate with a well-formed antenna pattern resulting from an exponential amplitude taper. This effort will be extended to permit the design of a lower sidelobe dielectric waveguide slot antenna.
Abstract : A millimeter wave feasibility line source array has been designed and constructed as p... more Abstract : A millimeter wave feasibility line source array has been designed and constructed as part of an effort to investigate techniques for low cost phase scan at millimeter frequencies. The array is composed of 15 edge slots on a specially constructed waveguide housing assembly containing discrete ferrite toroids. The entire array employs the series ferrite scan technique for simple, low cost scan. A description of the array design and configuration is given. Antenna patterns and the resultant scan characteristics are also presented.
Abstract A concept for a mm-wave ferrite phase scan antenna is presented along with the design an... more Abstract A concept for a mm-wave ferrite phase scan antenna is presented along with the design and the results of a 35-GHz test antenna. The antenna is fabricated by cutting periodic grooves into the side wall of an optimized (low loss, broadband) ferrite-type ...
Abstract : This paper examines the effects of signal-dependent versus non-signal-dependent errors... more Abstract : This paper examines the effects of signal-dependent versus non-signal-dependent errors on the geolocation accuracy that a state-of-the-art system based on Commercial-off-the-Shelf (COTS) equipment can potentially achieve. The results provide a focus for research in improvements of geolocation accuracy. The studies make use of a simulation tool developed by the Intelligence and Information Warfare Directorate (I2WD) at Fort Monmouth, NJ; supported by CACI Technologies, Inc., Eatontown, NJ; and the Research Associates of Syracuse (RAS), Syracuse, NY.
: ED ARRAYS, RADAR ANTENNAS), C BAND, ANTENNA APERTURES, ANTENNA RADIATION PATTERNS, DESIGNA C-ba... more : ED ARRAYS, RADAR ANTENNAS), C BAND, ANTENNA APERTURES, ANTENNA RADIATION PATTERNS, DESIGNA C-band waveguide phased array was designed and constructed as part of an effort to investigate techniques for a lightweight azimuth scanned phased array. The array is composed of sixteen waveguide line sources, each of which has sixteen edge slots. Antenna patterns are calculated from both near field probing and ideal aperture distributions, and then compared to measured patterns. Other parameters necessary for characterizing the array are presented. Performance was generally good, the major problem area being in a high cross polarization level due to the array configuration. Suggestions for improving the performance of the array are given. (Author)
: Investigations have continued into developing design criteria for a dielectric waveguide line s... more : Investigations have continued into developing design criteria for a dielectric waveguide line source antenna. The Marcatili analysis has proven to be a reliable guide for the transmission line design. There is, however, no practical design information available permitting the synthesis of a symmetrical amplitude taper along a grooved dielectric waveguide antenna. This investigation presents a measurement procedure that will permit a correlation between the radiating element physical configuration and the radiation properties. Additional data for various slot geometries will continue to be accumulated. A theoretical and emperical relationship will then be made so as to further relate the slot geometry to radiation characteristics. Our investigations have demonstrated that a non-metallic grooved dielectric waveguide can be made to radiate with a well-formed antenna pattern resulting from an exponential amplitude taper. This effort will be extended to permit the design of a lower sid...
Presented at the Army Sci Conf 15 18 Jun 1982, Jun 18, 1982
Abstract : Investigations have continued into developing design criteria for a dielectric wavegui... more Abstract : Investigations have continued into developing design criteria for a dielectric waveguide line source antenna. The Marcatili analysis has proven to be a reliable guide for the transmission line design. There is, however, no practical design information available permitting the synthesis of a symmetrical amplitude taper along a grooved dielectric waveguide antenna. This investigation presents a measurement procedure that will permit a correlation between the radiating element physical configuration and the radiation properties. Additional data for various slot geometries will continue to be accumulated. A theoretical and emperical relationship will then be made so as to further relate the slot geometry to radiation characteristics. Our investigations have demonstrated that a non-metallic grooved dielectric waveguide can be made to radiate with a well-formed antenna pattern resulting from an exponential amplitude taper. This effort will be extended to permit the design of a lower sidelobe dielectric waveguide slot antenna.
Abstract : A millimeter wave feasibility line source array has been designed and constructed as p... more Abstract : A millimeter wave feasibility line source array has been designed and constructed as part of an effort to investigate techniques for low cost phase scan at millimeter frequencies. The array is composed of 15 edge slots on a specially constructed waveguide housing assembly containing discrete ferrite toroids. The entire array employs the series ferrite scan technique for simple, low cost scan. A description of the array design and configuration is given. Antenna patterns and the resultant scan characteristics are also presented.
Abstract A concept for a mm-wave ferrite phase scan antenna is presented along with the design an... more Abstract A concept for a mm-wave ferrite phase scan antenna is presented along with the design and the results of a 35-GHz test antenna. The antenna is fabricated by cutting periodic grooves into the side wall of an optimized (low loss, broadband) ferrite-type ...
Abstract : This paper examines the effects of signal-dependent versus non-signal-dependent errors... more Abstract : This paper examines the effects of signal-dependent versus non-signal-dependent errors on the geolocation accuracy that a state-of-the-art system based on Commercial-off-the-Shelf (COTS) equipment can potentially achieve. The results provide a focus for research in improvements of geolocation accuracy. The studies make use of a simulation tool developed by the Intelligence and Information Warfare Directorate (I2WD) at Fort Monmouth, NJ; supported by CACI Technologies, Inc., Eatontown, NJ; and the Research Associates of Syracuse (RAS), Syracuse, NY.
: ED ARRAYS, RADAR ANTENNAS), C BAND, ANTENNA APERTURES, ANTENNA RADIATION PATTERNS, DESIGNA C-ba... more : ED ARRAYS, RADAR ANTENNAS), C BAND, ANTENNA APERTURES, ANTENNA RADIATION PATTERNS, DESIGNA C-band waveguide phased array was designed and constructed as part of an effort to investigate techniques for a lightweight azimuth scanned phased array. The array is composed of sixteen waveguide line sources, each of which has sixteen edge slots. Antenna patterns are calculated from both near field probing and ideal aperture distributions, and then compared to measured patterns. Other parameters necessary for characterizing the array are presented. Performance was generally good, the major problem area being in a high cross polarization level due to the array configuration. Suggestions for improving the performance of the array are given. (Author)
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