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A novel planar parasitic array antenna with reconfigurability in both frequency band and radiation pattern is proposed. It consists of six symmetrically reconfigurable radiating elements and six symmetrically reconfigurable parasitic elements. RF p-i-n diodes are used to switch the radiation structure and change the current distribution, which leads to 12 different radiation patterns and two frequency...
Effective point-spread function (ePSF) method is an excellent method for the stars' positional measurements in stellar images, whose critical step is constructing an accurate ePSF mode. In the study, we investigated the effect of the grid density on the mode's accuracy by some experiments on processing synthetic stellar images in which all stars have a Gaussian PSF. Our experimental results show that...
In this paper "T" shape transitions between the air-filled standard waveguide and SIW were introduced. This kind of transition is actually an E-plane T junction, which have the functions of a transition from the standard waveguide to SIW as well as a power divider. One specific application of this type transition is to connect the standard waveguide to a slotted waveguide array antenna or...
This paper introduced the waveguide slot array antennas are an important class of microwave antennas with numerous applications such as radar and communication systems. A 10-element K-band SIW based 45-degree linearly polarized slot traveling-wave antenna array is proposed and designed. Metalized through holes (via) are used to cancel the reflection and support a traveling wave. The reflection characteristics...
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