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Journal articles on the topic 'Gregorian antennas'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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1

Yeap, K. H., M. C. Loh, C. Y. Tham, C. Y. Yiam, K. C. Yeong, and K. C. Lai. "Analysis of Reflector Antennas in Radio Telescopes." Advanced Electromagnetics 5, no. 3 (2016): 32. http://dx.doi.org/10.7716/aem.v5i3.402.

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We present an analysis on the performance of the Cassegrain and Gregorian on-axis, off-axis and offset antennas. In our study, we have adopted the design parameters for the Cassegrain configuration used in the Atacama Large Millimeter Array (ALMA) project. Modifications on the original parameters are made so as to meet the design requirement for the off-axis and offset configurations. To reduce spillover loss in the offset antennas, we have adjusted the angle between the axis of the primary reflector and that of the sub-reflector, so that the feed horn is placed right next to the edge of the p
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2

Afacan, Erkan, and Erdem Yazgan. "The effect of loading Gregorian antennas on side-lobe levels." Canadian Journal of Physics 74, no. 9-10 (1996): 685–91. http://dx.doi.org/10.1139/p96-098.

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E- and H -plane radiation patterns of focus-fed, axially symmetric Gregorian antennas are analyzed using the generalized method of the geometrical theory of diffraction. Only the rim of the main reflector was loaded, in a smoothly tapered manner, but the whole surface of the subreflector was loaded. Loads are defined in terms of surface impedances. With the help of this analysis, the effect of the smoothly tapered rim loading on the far-field radiation patterns of Gregorian antennas can be studied in detail.
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3

Martinez-Lorenzo, Jose A., Antonio Garcia-Pino, Borja Gonzalez-Valdes, and Carey M. Rappaport. "Zooming and Scanning Gregorian Confocal Dual Reflector Antennas." IEEE Transactions on Antennas and Propagation 56, no. 9 (2008): 2910–19. http://dx.doi.org/10.1109/tap.2008.928777.

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4

Dragone, C. "Theory of imaging of Cassegrainian and Gregorian antennas." IEEE Transactions on Antennas and Propagation 34, no. 5 (1986): 689–701. http://dx.doi.org/10.1109/tap.1986.1143870.

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5

de Villiers, Dirk I. L. "Prediction of Aperture Efficiency Ripple in Clear Aperture Offset Gregorian Antennas." IEEE Transactions on Antennas and Propagation 61, no. 5 (2013): 2457–65. http://dx.doi.org/10.1109/tap.2013.2239953.

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6

Rusch, W. V. T., A. Prata, Y. Rahmat-Samii, and R. A. Shore. "Derivation and application of the equivalent paraboloid for classical offset Cassegrain and Gregorian antennas." IEEE Transactions on Antennas and Propagation 38, no. 8 (1990): 1141–49. http://dx.doi.org/10.1109/8.56949.

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7

Granet, C. "Designing classical offset Cassegrain or Gregorian dual-reflector antennas from combinations of prescribed geometric parameters." IEEE Antennas and Propagation Magazine 44, no. 3 (2002): 114–23. http://dx.doi.org/10.1109/map.2002.1028736.

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8

Granet, C. "Designing axially symmetric Cassegrain or Gregorian dual-reflector antennas from combinations of prescribed geometric parameters." IEEE Antennas and Propagation Magazine 40, no. 2 (1998): 76–82. http://dx.doi.org/10.1109/74.683545.

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9

Granet, C. "Designing classical offset cassiegrain or gregorian dual-reflector antennas from combinations of prescribed geometric parameters part 2: feed-horn blockage conditions." IEEE Antennas and Propagation Magazine 45, no. 6 (2003): 86–89. http://dx.doi.org/10.1109/map.2003.1282183.

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10

Granet, C. "Designing axially symmetric Cassegrain or Gregorian dual-reflector antennas from combinations of prescribed geometric parameters. 2. Minimum blockage condition while taking into account the phase-center of the feed." IEEE Antennas and Propagation Magazine 40, no. 3 (1998): 82–89. http://dx.doi.org/10.1109/74.706098.

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11

Mohammadirad, M., and N. Komjani. "An Offset Gregorian Dual-Reflectarray Antenna with Eight Scanned Beams." Electromagnetics 34, no. 2 (2014): 111–27. http://dx.doi.org/10.1080/02726343.2014.863685.

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12

Kim, Chun-Won. "The Axial-displaced gregorian antenna design using Ray-tracing Method." Journal of the Korean Society for Aeronautical & Space Sciences 42, no. 6 (2014): 515–21. http://dx.doi.org/10.5139/jksas.2014.42.6.515.

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13

Dragone, C., and J. T. Ruscio. "Imaging in a Gregorian antenna from 12 to 30 GHz." IEEE Transactions on Antennas and Propagation 36, no. 2 (1988): 209–15. http://dx.doi.org/10.1109/8.1098.

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14

Sugama, C., and V. Chandrasekar. "Topside radio frequency system consolidation with Gregorian parabolic antenna stacking." Electronics Letters 56, no. 24 (2020): 1295–98. http://dx.doi.org/10.1049/el.2020.2142.

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15

Bringi, V. N., R. Hoferer, D. A. Brunkow, et al. "Design and Performance Characteristics of the New 8.5-m Dual-Offset Gregorian Antenna for the CSU–CHILL Radar." Journal of Atmospheric and Oceanic Technology 28, no. 7 (2011): 907–20. http://dx.doi.org/10.1175/2011jtecha1493.1.

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Abstract The Colorado State University–University of Chicago–Illinois State Water Survey (CSU–CHILL) national weather radar facility has been operated by the Colorado State University under a cooperative agreement with the U.S. National Science Foundation from 1990 to the present. The radar is configured to measure the elements of the 3 × 3 polarimetric covariance matrix based on using a two-transmitter and two-receiver system in the horizontal–vertical polarization basis. This S-band Doppler, dual-polarized radar facility is used for observations of precipitation with the highest possible dat
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16

de Villiers, Dirk I. L., and Robert Lehmensiek. "Rapid Calculation of Antenna Noise Temperature in Offset Gregorian Reflector Systems." IEEE Transactions on Antennas and Propagation 63, no. 4 (2015): 1564–71. http://dx.doi.org/10.1109/tap.2015.2399933.

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17

Kim, Chun-Won, Chi-Hyun Cheong, Kun-Woo Kim, and Seong-Jae Lee. "The Design of Elliptical Dual Offset Gregorian Antenna for Satellite Communication on Ka-band." Journal of the Korea Institute of Military Science and Technology 16, no. 6 (2013): 811–18. http://dx.doi.org/10.9766/kimst.2013.16.6.811.

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18

Capolino, F., P. Bussotti, L. Borselli, M. Albani, and S. Maci. "Effects of a fin edge close to a point caustic of a Gregorian antenna." Microwave and Optical Technology Letters 14, no. 1 (1997): 20–23. http://dx.doi.org/10.1002/(sici)1098-2760(199701)14:1<20::aid-mop7>3.0.co;2-o.

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19

Gupta, Ramesh Chandra, Sravan Kumar Sagi, and Milind B. Mahajan. "Parallel-Shaping Technique for a Ring-Focus Reflector Antenna: A multiband Gregorian ring-focus reflector antenna for the Satcom flyaway terminal." IEEE Antennas and Propagation Magazine 61, no. 5 (2019): 87–96. http://dx.doi.org/10.1109/map.2019.2932306.

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20

Yamazaki, Hiroyuki, and Katsumasa Miyata. "Near-Field Environment Evaluation of Offset Gregorian Antenna for Compact-Range Application." International Journal of Simulation Systems, Science and Technology, October 8, 2020. http://dx.doi.org/10.5013/ijssst.a.17.32.06.

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