標題: Efficiency enhancement of single off-axis and multiple overlapping beam reflectors using dielectric-covered focal plane array feeds
作者: Kehn, M. Ng Mou
電信工程研究所
Institute of Communications Engineering
公開日期: 1-一月-2013
摘要: Reflector antennas fed by dense focal plane arrays (FPAs) are known for their high aperture efficiency, low scan loss, and ability to achieve closely overlapping beams and thus improved continuity in the field of scan. These benefits are possible because FPAs comprise electrically small elements with diameters within half a wavelength, which sample the focal plane fields to a high resolution. This work explores the prospects of further enhancing the total efficiency of FPA-fed reflector systems by using dielectric covers placed over FPA feeds composed of open-ended waveguides. The parameters investigated are the permittivity and thickness of the dielectric layer. We will demonstrate the ability of these covers to improve the overall efficiency of reflectors compared to that of reflectors fed by uncovered FPAs, over several beam widths of scan for single steered beams, as well as to enhance the individual constituent beam efficiencies of simultaneously overlapping multiple beams. Citation: Ng Mou Kehn, M. (2013), Efficiency enhancement of single off-axis and multiple overlapping beam reflectors using dielectric-covered focal plane array feeds, Radio Sci., 48, 69-88, doi:10.1002/rds.20022.
URI: http://dx.doi.org/10.1002/rds.20022
http://hdl.handle.net/11536/21777
ISSN: 0048-6604
DOI: 10.1002/rds.20022
期刊: RADIO SCIENCE
Volume: 48
Issue: 1
起始頁: 69
結束頁: 88
顯示於類別:期刊論文


文件中的檔案:

  1. 000317836400008.pdf