Influence of calibration loads structure on emissivity at millimeter-wave lengths

Author

Li, Zhiping ; Liu, Dawei ; Bai, Ming ; Miao, Jungang ; Li, Xuan

Author_Institution

Electromagn. Lab., Beihang Univ., Beijing, China

fYear

2011

fDate

1-3 Nov. 2011

Firstpage

798

Lastpage

801

Abstract

By using the three-dimensional finite-difference time-domain (FDTD) algorithm, we investigated the optimal structure parameters of pyramidal arrays used for millimeter-wave radiometer calibration. The arrays are constructed with a periodically arranged metallic pyramids which are coated with absorbing materials. In considering the difficulties in manufacturing the sharp tips of the pyramids, we investigated the effect of two other tip shapes: flat and semi-spheric. We found that the absorbing performance of the pyramidal array with semi-spheric tips is about 10dB higher than that with flat tips.

Keywords

absorbing media; emissivity; finite difference time-domain analysis; millimetre wave devices; radiometers; absorbing material; calibration load structure; emissivity; flat tips shape; millimeter-wave length; millimeter-wave radiometer calibration; optimal structure parameters; pyramid sharp tips manufacturing; pyramidal array; semispheric tips shape; three-dimensional finite-difference time-domain algorithm; Calibration; Finite difference methods; Materials; Microwave radiometry; Microwave theory and techniques; Shape; Time domain analysis; FDTD; calibration target; emissivity; pyramid array;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation, and EMC Technologies for Wireless Communications (MAPE), 2011 IEEE 4th International Symposium on

Conference_Location

Beijing

Print_ISBN

978-1-4244-8265-8

Type

conf

DOI

10.1109/MAPE.2011.6156216

Filename

6156216