Lightweight Portable Planar Slot Array Antenna for Satellite Communications in X-Band

Aperture slot size effect to wide band open air gap radial‐line slot array performance

“…Microwave imaging (MI) is a new technique for breast cancer detection, in which the detection is achieved by the exploiting significant contrast in the dielectric properties of normal breast and malignant tumor tissue at microwave frequencies [1]. General approaches to active MI include ultrawideband radar-based [2,3] or microwave tomography (MT) [4,5] methods. The first approach identifies the tumors by synthetically focusing reflection from the breast [6,7].…”

“…Both antennas developed by Ando and Davis had many slots, which enabled high gain and directivity attainment [1][2][3]. Recent development in the studies of RLSA antenna for point to point application is focused on RLSA size reduction [4][5][6][7][8][9][10]. The robust and simple structure has attracted interest from researchers in this field of study to further [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com] investigate its applicability to mobile terminal transceiver [6,7].…”

“…Most of the researchers in the field of RLSA antenna design use the 1mm slot width as well as the half guide wavelength of the slot length. This is aimed at achieving high gain and directivity values of the RLSA antenna [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Geometrical Synthesis of Sparse Antenna Arrays Using Compressive Sensing for 5G IoT Applications

“…The idea of combining the radiation of multiple antennas to obtain specific pattern shape dates back to the beginning of the 19th century, when the history of wireless communications began [1,2]. Nowadays, antenna arrays are widely used in a large variety of scenarios involving far-and near-field focusing/multifocusing applications for satellite, cellular, vehicular, and sensor networks [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. However, even if the array technology is already widespread, its importance is expected to further increase, since the directionality of the communications will represent a basic enabling functionality of the forthcoming fifth-generation (5G) and Internet of things (IoT) systems [18][19][20][21].…”

6×6 Array of Four-arm Spiral Antennas for High-gain Satellite Receiver Applications at Low Elevation

“…Due to the world-wide availability and high data rate most of these systems function in Ku-band (12-18 GHz). During the last decade, various configuration of antenna arrays have been investigated for satellite communication applications, such as microstrip patch antenna [1]- [2], helical antenna array [3], two-arm spiral array [4], aperture-coupled dipole antenna array [5], and slot array antenna [6]. However, these antennas provide a narrow elevation scanning range and the gain of these antennas drops significantly in low elevation angles (> 60 o ).…”