نتایج جستجو برای: planar antenna array
تعداد نتایج: 232880 فیلتر نتایج به سال:
چکیده ندارد.
ABSTRACT In this paper, a method of a Multiobjective Optimisation based on Chebytshev’s method and Genetic Algorithm for the synthesis of planar array antenna was investigated. This method for antenna pattern synthesis could suppress multiple interferences by placing nulls at the directions of the interfering sources and placing the main beam in the direction of the desired signal by controllin...
Improving antenna performance is an important topic in antenna design. This paper proposes an improved planar array antenna to achieve proper input impedance matching and suppress the undesired surface waves by utilizing a new center-fed coaxial-to-SIW transition and a uniplanar electromagnetic band-gap (UC-EBG) structure. A proposed center coaxial feed is used in substrate integrated waveguide...
We generalize the notion of Jacobson graphs into $n$-array columns called $n$-array Jacobson graphs and determine their connectivities and diameters. Also, we will study forbidden structures of these graphs and determine when an $n$-array Jacobson graph is planar, outer planar, projective, perfect or domination perfect.
In this research work, a multibeam antenna which is a combination of a beamformer network (BFN) and a linear array antenna, has been designed. A Rotman lens has been chosen as beamformer network and Vivaldi antennas have been selected for constructing array antenna. The Substrate Integrated Waveguide (SIW) was used for implementing Rotman lens. After explanation the structure of Substrate integ...
Data capacity is rapidly reaching its limit in modern optical communications. Optical vortex has been explored to enhance the data capacity for its extra degree of freedom of angular momentum. In traditional means, optical vortices are generated using space light modulators or spiral phase plates, which would sharply decrease the integration of optical communication systems. Here we experimenta...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید