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![Vivaldi Shaped TEM horn antenna (PDVA10) [7].](publication/273596459/figure/fig3/AS:1088937682579463@1636634383740/Vivaldi-Shaped-TEM-horn-antenna-PDVA10-7_Q320.jpg)
Ultrawideband (UWB) antennas are of huge demand and Vivaldi antennas as well as the TEM horn antennas are good candidates for UWB applications as they both have relatively simple geometry and high gain over a wide bandwidth. The aim of this study is to design a compact antenna that achieves maximum gain over a bandwidth between 1.5 and 10.6 GHz whi...
Citations
... Then, EBG structure which introduce interesting properties is used in order to improve the antenna performances. Lately, the EBG structure have been used extensively toimprove the performances of the antenna by improving the gain and reducing the radiation exposure to the human body [8][9][10][11][12][13][14]. ...
Flexible dual band dipole antenna incorporates with Electromagnetic Band Gap (EBG) to improve the well-known low profile characteristics of dipole antenna. The antenna operates at 2.45 GHz and 5.8 GHz which is printed on Fast film with 0.13 mm thickness. While the EBG is designed at 5.8 GHz by using Arlon AD350 with 1.016 mm thickness. EBG works as a ground plane for the antenna and helps by improving the realized gainandradiation pattern. Besides, EBG also act as a filter as the resonant frequency of the antenna is close to the EBG band gap. The 2.45 GHz of is eliminated while the performances of antenna at 5.8 GHz is improved. Thus the realized gain is increased up to 6.86 dB and the back lobes are clearly reduced. The designs of dipole antenna with EBG application such as Wifi and others on-body communication devices. © 2017 Institute of Advanced Engineering and Science. All rights reserved.
... TEM horn antenna is commonly used due to its relatively high gain, wideband, and simple structure for various applications [1,2]. Typical applications include EMC experiments and ground penetrating radar (GPR), detecting hidden objects in wall and UWB communication [3][4][5][6][7]. To radiate electromagnetic waves, the dimension and impedance of the TEM horn antenna should be properly chosen to achieve wideband characteristics [8]. ...
A novel ultra-wideband (UWB) TEM horn antenna fed by a microstrip-type transition is designed. The feeding structure is directly realized by a microstrip line with the merit of compact size and UWB. To broaden the low frequency band, an arc surface is added at the end of the flare plates. Numerical simulation is applied to discuss the effect of the geometry construction which contains the microstrip-type transition and the circular arc surface at the end of radiating arm. Return loss, radiation pattern, and gain of the fabricated antennas are measured. The measured results show that the antenna yields a wide bandwidth ranging from 1 GHZ to 10.3 GHz with return loss less than −10 dB. The antenna also achieves unidirectional radiation patterns with stable antenna gain. These characteristics imply that the compact antenna may be used for detecting buried objects in the wall or UWB communication systems of band like GSM, Wi-Fi, and so forth.
In this paper, it is presented that quasi TEM-Horn antenna array to rescue buried victims under rubble. Designed antenna array, which consists of 4 elements, is operated between 400 MHz and 2 GHz. In order to penetrate electromagnetic wave into rubble, lower frequencies like 400–500 MHz should be used, because of attenuation of the concrete. Besides, it is required that ultra-wide band operation for good resolution while searching a buried victim. As an element of the array, quasi TEM-Horn antenna is utilized. Total dimensions of the array antenna are 14 cm × 27 cm × 57 cm. Distance between each element is 14 cm and also there is a reflector behind the antennas. Antenna gain is started from 8 dBi at 400 MHz and is increased till 14 dBi at 2 GHz. Furthermore, VSWR of the antenna is mostly fewer than 2 at the operation band, but at some frequencies it reaches 3. Reflector, which is placed 6 cm behind the array, is not only providing gain enhancement, but also reducing back lobe radiation at lower frequencies and shielding. Moreover array elements could be employed to understand which way the target is using A-scan data.
