Multi-dielectric layer multi-patches microstrip antenna for UWB applications

Abstract

A wideband compact multilayer microstrip antenna with a new feeding arrangement is presented for ultra-wideband (UWB) applications. The antenna consists of a driven patch radiator and 5 stacked parasitic radiators. A new feeding technique is proposed to enhance the impedance bandwidth of the antenna structure. The feeding structure consists a via connected to a microstrip line which excites the patch radiator in a broadband manner. In order to achieve UWB performance, parasitic patches are electromagnetically coupled to the driven patch in the multilayered microstrip structures. The proposed antenna has a measured 10-dB return loss bandwidth of 48% and directional radiation, which covers the lower UWB band very well. The maximum gain is more than 6.5 dBi across the bandwidth. Furthermore, the proposed broadband structure can be deployed in a space-limited environment and multi-dielectric layer antenna applications.

Broadband circularly polarized patch antenna with low crosspolarization using artificial ground structure

“…Many techniques have been proposed to enhance the bandwidth of impedance or AR characteristics of microstrip antennas. [1][2][3][4][5][6][7] Two-feed excitation can achieve relatively broadband characteristics, 6,7 however, these excitations require an additional circuit to make 908-phase difference between two orthogonal electric field (E-field) components. Single-feed structures can make antennas have a simple structure compared to the two-feed excitation but they normally suffer from a narrow bandwidth in AR.…”

“…1,2 Other great interests of supercontinuum applications are as time-resolved spectroscopy and optical coherence tomography; in which the ultra-broadband and spatially coherent nature of the source can improve the measurement and resolution. 3,4 Other deployments also can be found in laser gas analysis 5 and optical frequency metrology. 6 Supercontinuum generation in optical fibers was first demonstrated in the 1970s by Alfano and Shapiro.…”

Enhanced Gain and Bandwidth of Patch Antenna Using EBG Substrates

“…The generation of surface waves degrades the antenna efficiency and radiation pattern. Furthermore, it increases the mutual coupling of the antenna array which causes the blind angle of a scanning array [12][13][14].…”