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Antenna radiation pattern can be defined by photon probability distribution. Based on this, this paper points out that the negentropy of beamforming system relative to isotropic antenna system nearly equals to the system capacity improvement of wireless communication introduced by beamforming, which is constructed on the physical process of beamforming emission and the definition of traffic.
The millimeter wave is considered as one of the most important resources for the IMT system towards to the 5G. In this paper, building entry loss model of typical office building is studied. The characteristics are analyzed on the basis of 24 to 31 GHz measurement results.
A printed ultra-wideband (UWB) antenna operating at the frequency range of 2.9-11.0 GHz is proposed for diversity applications. By adopting two symmetrical P-shaped radiators, the antenna presents wideband impedance matching characteristic. The antenna can achieve good impedance matching and improved isolation by notching a slot at the upper centre portion of the ground plane and inserting a stub...
The design of a compact ultra-wideband printed antenna is presented. By using two partly circulars patch with resonating elements, a bandwidth of more than 185%. The proposed radiator is quasi omni-directional with appreciable gain throughout the band. The performance is demonstrated through measurements and calculations with a commercially available field.
Two types of ultra-wideband (UWB) antennas with triple band-notches are proposed. The antennas consist of an elliptical patch and split ring slots on the patch, complementary electromagnetic band gap (CEBG) at the both sides of the feed line and ring on the ground. Stable gain and quasi omnidirectional radiation patterns are showed. They can be used in the UWB communication systems.
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