Abstract
A single-layer ultra-wideband microstrip patch antenna loaded with an asymmetrical U-shaped slot for millimetre wave application is presented in this paper. The antenna is coaxial fed, and it is implemented on a Roger 5880 substrate with a relative dielectric constant of 2.2, thickness 3.15 mm, and loss tangent 0.0009. It operates over the frequency in the Ka-band from 31 to 37 GHz in the microwave spectrum. The results of the simulated reflection coefficient, radiation pattern, and maximum gain of the antenna are in fair agreement with the measured ones. Moreover, the measured reflection coefficient is carried out in the labs. The gain of The peak value of 7.4 dB is obtained at 34 GHz.
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