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This paper discusses an antenna system composed of a fed metaspiral element and two dielectric slabs above the spiral. Analysis reveals that the slabs lead to an increase in the gain, in accordance with the formation of a narrow radiation beam. A gain of 6.5 dBi is obtained, which is 6.5 dB higher than the gain in the absence of the slabs.
A metaloop antenna that has a negative propagation phase constant for the current on its closed arm is proposed and investigated. A linearly polarized (LP) broadside radiation pattern is obtained at different frequencies below and above frequency fT, where the propagation phase constant is zero. In addition, it is revealed that the metaloop forms an LP dual-peak radiation pattern at different frequencies...
This paper presents the radiation characteristics of a low-profile circularly polarized loop antenna that has a left-handed property. The antenna height is set to be small (less than 0.03 wavelength). The gain, axial ratio, radiation efficiency, and VSWR are discussed.
This paper presents the design of the circularly polarized slot antenna on the flexible substrate for ultra wide band (UWB) high band application. We applied two slots which are crossed perpendicularly to obtain circularly polarized wave. By optimizing the lengths and widths of the antenna slots and substrate, wide band impedance matching can be realized. Impedance bandwidth of proposed antenna is...
This paper presents the design of thin planar one-sided directional slot antenna on patterned circuit board. Our proposed planar antenna has the matching circuit composed of coplanar waveguide (CPW) transmission line, interdigital gap, a top metal layer and a bottom floating metal layer. In order to realize the one-sided directional properties, the length of the top metal layer is adjusted, and at...
In this paper, the one-sided directional slot dipole antenna with for 5 GHz-band application have been designed and experimentally verified. The antenna size is 22 mm times 29 mm, which is smaller than a patch antenna at the same frequency. The measured radiation patterns are in the good agreement with the simulation which shows the effectiveness of the presented technique to realize on-sided directional...
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