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An inhomogeneous loop plate (iHomLP) is composed of M loops in the x-direction and (2N+1) loops in the y-direction. All the loops have the same peripheral length, and have different strip widths in the x-direction. It is found that, as the number of loops (2N+1) is increased, the gain increases gradually and reaches a maximum value. The frequency band of the VSWR is approximately 5.7% for M = 2N +...
A bent four-leaf antenna (BeFoL) is considered to generate four reconfigurable beams. For this, one end of the four leaves is excited with the others shorted to the ground plane. The beam direction in the elevation plane is controlled by the size of the ground plane. One technique of directing the beam in the horizontal direction is also presented, where the finite square ground plane is bent. It...
This paper presents an antenna that operates over a frequency range of 2.4 GHz to 10.6 GHz, such that the antenna handles both LAN and UWB frequencies. This antenna, designated as the PaSP antenna, is composed of two patches, where one is fed and the other is short-circuited to the ground plane. The design of this antenna is performed using four steps. The frequency response of the VSWR for each step...
A strip-type grid array antenna is analyzed using the finite-difference time-domain method. The space between the grid array and the ground plane, designated as the rear space, is filled with a dielectric layer and an air layer (two-layer rear-space structure). A VSWR bandwidth of approximately 13% is obtained with a maximum directivity of approximately 18 dB. The grid array exhibits a narrow beam...
An array composed of a pair of inverted F elements above an EBG reflector is constructed and analyzed using the finite-difference time-domain method (FDTDM). The array is characterized by inverted F elements that have an extremely small height above the surface of the EBG reflector (0.03 wavelength). The analysis is performed for two cases (CASE I and CASE II). The two inverted F elements for CASE...
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