This work involves designing an antenna that meets the requirements of radar systems. The associated technology, which was for a long time reserved for the military field, is now available in the civil field, as well as in the biomedical sector for the development of "monitoring" systems allowing to monitor the state of health of a patient in a non-invasive way. The goal of this article is to design a wearable textile antenna to detect cancerous tumors of a patient without direct contact with the skin taking into account the electromagnetic waves directed towards the human body due to the difference between the dielectric constants of healthy and unhealthy tissues. Here we present a miniature AMC antenna of rectangular shape that satisfies the UWB characteristics in terms of bandwidth and reflection coefficient. The proposed AMC antenna operates in X-frequency band (8-12 GHz). Using a model of dielectric artificial skin, we have simulated the specific absorption rate on the human body in order to better respect the FCC standards allowed 1.6 W/kg averaged to 1 g of human tissue.

This study focuses on the design, simulation, and fabrication of a coplanar waveguide miniaturised wearable antenna that is fully implemented in textile materials and operable at 2.45/5.8 GHz for wireless local area network applications. This antenna is assumed to be placed near the human body, so that it needs to be miniaturised with excellent performances. To increase the performance of the short‐distance textile antenna and to control the specific absorption rate, an artificial magnetic conductor (AMC) is preferred as a reflector plane. The volume of the proposed antenna with AMC is 75 × 50 × 6 mm3, the simulation and measurement results are in good agreement and show that the antenna performances perform better results in comparison with the one reported so far in the literature while having a smaller volume. AMC significantly improves the performance of the antenna. The gains of the antenna are 8.2 and 9.95 dBi at 2.45 and 5.8 GHz, respectively (an increase of 3 dB compared with an antenna without AMC).

With the development of modern wireless technologies and the miniaturization of antennas and electrical systems, the use of antennas on the human body for Wi‐Fi applications has become important. However, integrating the antenna near the body immediately raises the question about the protection of the body and the radiation effectiveness of the antenna. One solution that has recently attracted great attention is the use of high impedance surfaces (HIS), which is studied here for the antennas integrated on clothes. Indeed, the HIS greatly reduces the radiation back face of the antenna, thus reducing the value of the specific absorption rate in the presence of the body. In this article, we present a dual‐band antenna placed above an artificial magnetic conductor (AMC). The AMC used has the smallest dimensions and makes it possible to obtain the behavior of a perfect magnetic conductor at 2.45 and 5.8 GHz.

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Dielectric resonators have become very important thanks to the daily evolution of telecommunication systems which aim to continually reduce the size and the weight of systems, besides rising the frequency and the bandwidth. In this paper, a flexible antenna using dielectric resonator antenna is presented and designed using textile materials for wearable applications at the WLAN band. The designed antenna is meant to act like a button placed on the shoulders. A study on the antenna/body interaction beginning with a comparison of the performance of the free space antennas, as well as that of a phantom rectangle with the physical properties of the human body is verified. Next to that, an impressive gain of 5.4 dB is achieved at the operating frequency of 5.8 GHz. It has been confirmed that the specific absorption rate meets the standard. Another study on the influence of a mobile phone on the operation of the antenna has also been presented. These results were confirmed by the measurements.

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This paper presents the development of a miniature antenna array in a small space in order to achieve superdirectivity for long-range communication. The proposed structures consist of a superdirective metamaterial-inspired array based on a capacitively loaded loop (CLL) driven by an electrically small monopole antenna. This elementary antenna is then used in two- and three-array configurations separated by a fixed interelement distance of 0.1λ to achieve a higher directivity and compact size (with λ the wavelength calculated at the operation frequency 1.850 GHz). The design of the elementary antenna, its simulated radiation performances, as well as those of the parasitic array are also reported. The results of the optimization of two- and three-antenna arrays are discussed. For this study, three corresponding prototypes were fabricated and tested. The measured impedance mismatch and radiation pattern results are presented and shown to be in good agreement with their simulated values. The maximum measured directivity is equal to 5.9 dBi and 4.75 dBi in the case of the two- and three- elements, respectively. The proposed antenna arrays can serve for the realization of point-to-point wireless links and can have a significant impact on compact and high-directive radiofrequency front-ends of a wireless system and for wireless power transfer applications.