Papers

Papers tagged with : MM wave

06
Oct
2015

Modeling the optical system on the Planck Space Telescope pre-launch was a very demanding task, with the huge electrical size, the strict accuracy requirements and the complicated feed arrangement...

12
Oct
2014
Co-authors:
Sergey Pivnenko, Dept. of Electrical Engng., TUD, Denmark / Oleksiy Kim, Dept. of Electrical Engng., TUD, Denmark / Olav Breinbjerg, Dept. of Electrical Engng., TUD, Denmark / K. Branner, Dept. of Wind Energy, TUD, Denmark / C. M. Markussen, Dept. of Wind Energy, TUD, Denmark / M. Paquay, ESA/ESTEC, The Netherlands

Inter-comparisons and validations of antenna measurement ranges are useful tools allowing the detection of various problems in the measurement procedures, thus leading to improvements of the...

12
Apr
2010

Instruments for Earth observation working from WBand up to mm-wave frequencies mainly use quasi-optical feed systems (QOF) to illuminate the corresponding reflector antennas. The final design of...

10
Jun
2007

In a quasi-optical network the beams are usually focused and guided through the system by means of curved and planar mirrors. Physical Optics (PO) is an accurate analysis tool for these elements,...

22
Jun
2003

Results are presented of investigations with a laboratory model of a reconformable reflector for MM and sub-MM applications. A configuration with 19 actuators to control the surface has been...

15
Apr
2003

A mechanically controllable reflector has been manufactured by using an electroformed Nickel shell supported and controlled by 19 actuators. If such a system is used as subreflector in a...

18
Sep
2002

A fast physical optics (PO) method is presented which in two steps calculates the scattered field of an optical component in a beam waveguide (BWG). The first step involves a calculation of a set...

16
Jun
2002

The paper describes investigations and use of a reconformable reflector. Implementation is discussed for millimetre and/or sub-millimetre wave antenna configurations. The perspectives of...

26
Mar
2002

A frame based Gaussian beam expansion method which can be used for analysis of quasi-optical beam waveguides is presented. The method is tested for the scattered field of an ellipsoid at 321 GHz...