Abstract
The adjusting parasitic patch size technique for the broad-beam microstrip antenna array using the cavity-backed slot coupling is presented. The phase of each element of the microstrip array has been designed to emulate the reflection of waves on the surface of parabolic backscattering. In order to increase the efficiency of this array antenna, the back-slot cavity with an exciting probe will be employed for coupling the electromagnetic waves to the back of this array. The proper sizes and locations of patches and the optimized position of the cavity have been investigated by the Computer Science Technology (CST) Microwave Studio. The gain, the radiation pattern, the bandwidth, and the return loss are extensively analyzed. The fabricated antenna has the return loss of −22.39 dB, the bandwidth of 47 MHz (4.975–5.022 GHz), and the maximum directive gain of 5.6 dB at 5 GHz, and it can produce a wide beam width (half-power beam width around 130°). The antenna could be applied for wide applications in the wireless communications system. In particular, this realizing antenna covers the low earth orbit (LEO) satellite beam.
Highlights
The optimal parameter values of the proposed effects of the installing position antenna are presented in Table 1, and several parameters have been improved thereafter, such as the gain, the return loss, and the beam width
A broad-beam antenna using a microstrip patch parasitic array, which is excited by the cavity-backed slot coupling, has been proposed in this paper
In order to achieve the broad-beam antenna, the square patch sizes, the slot length, the slot width, the probe length, the cavity positions, and the gaps between the parasitic patches array around the radiation patch were simulated
Summary
The antenna technology for the space and geographical information system (GIS), especially the low earth orbit (LEO) satellite communication systems, has been extensively investigated. An analytic design of the broad-beam microstrip antenna (MSA) array using the cavity-backed slot coupling is presented. The structure of this cavity-backed, [17,18,19]. In order to achieve the broad-beam antenna, the phase of each array element in the microstrip array antennas is designed This design emulates the function of curvature of the parabolic backscattering by modifying the parameters of the parasitic patch array around the radiation patches. These parameters are as follows: the patch sizes, the slot length, the slot width, the probe length, the cavity positions, and the gaps. The proposed antenna has the potential to be applied to a LEO satellite for an earth coverage beam or used for other applications in a wireless communications system, WLAN [24,25,26] and sub-6 GHz 5G communications [27,28,29]
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