Abstract
In this paper, we resolve two issues of microstrip antennas, which are miniaturization and efficiency behavior. For that, a rectangular patch antenna with 16×18×1.6 mm3 dimensions with dual-band characteristics, was designed, fabricated and characterized. In order to improve the problem of narrow bandwidth in microstrip antennas, we implement in this study the slot technique, allowing us to achieve our purpose. This technique, lead to a good reflection coefficient and VSWR. The characteristics of the fabricated antenna were measured and analyzed by Vector Network Analyzer. The results show two resonance frequencies that define two bandwidths defined by a return loss less than -10 dB and are respectively; 7.47 GHz at a frequency of 400 MHz, and 11.01 GHz at a frequency of 790 MHz. Also, the obtained gain has a good value and it’s very remarkable according to the small size of the structure, with a peak value of 6.1 dB at 12.5 GHz. The small size and good characteristics enlarged the applications domains of our structure, from telecommunications and especially Radar, satellite communications to medical and wireless applications.
Highlights
Microstrip antennas are part of different new technologies due to their miniaturization, efficiency, easy to fabricate and very flexible to integrate into any PCB circuit, which makes them too much requested and developed.Radiating elements present the important part of these antennas
As the challenge in microstrip antenna design is increasing the bandwidth and the gain as described in [1], this radiating element characterized by small surface and few micrometers of thickness led to the development of different technology by using different techniques; for instance: Array process to enhance the gain, and insertion of slots to improve narrow bandwidth
We present the microstrip patch antenna shown in figure 2
Summary
Microstrip antennas are part of different new technologies due to their miniaturization, efficiency, easy to fabricate and very flexible to integrate into any PCB circuit, which makes them too much requested and developed. As the challenge in microstrip antenna design is increasing the bandwidth and the gain as described in [1], this radiating element characterized by small surface and few micrometers of thickness led to the development of different technology by using different techniques; for instance: Array process to enhance the gain, and insertion of slots to improve narrow bandwidth. We present an efficient and small rectangular patch antenna operating in C and X bands. This structure is very reliable by combining small size and high gain which are very interesting and promising results. The structure of the antenna is the same as that of the previous paper, but the analysis of this paper contains more explanations of the different design steps
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