Wideband and high gain stacked microstrip antenna for Ku band application

Abstract

In this paper principle of stacking is implemented on a L-shape slot loaded broadband patch antenna for enhancing the gain without affecting the broadband impedance matching characteristics and offsetting the position of the upper patch excites a lower resonance which enhances the bandwidth further. The bandwidth, gain, size reduction and efficiency obtained in the designed antenna makes it a potential radiator for Ku band application

An ultra wideband antenna for Ku band applications

“…The graph also shows that below a threshold of -10 dB, the antenna has reached a bandwidth of 10.48 GHz from 9.34 GHz to 19.82 GHz. This which represents more than the bandwidth reached in [22], [23], [24]. Figure 8 shows the variation of antenna gain relative to the frequency.…”

“…In the following of this paper, the first section will be devoted to the mathematical formulation of the maxwell's equations, then the following section will describe in detail the proposed antenna and how to determine its parameters, at the end of this document a comparison between this antenna and other antennas presented in [22], [23], [24] will be done.…”

“…A directional diagram is observed in the plane E and the pseudo omnidirectional diagram in the plane H. [22], [23], [24] The antenna proposed in [22] achieves a reflection coefficient of -26 dB, a bandwidth of 2.8 GHz from 11.20 GHz to 14.0 GHz and a gain of 4,65 dB. Another antenna structure was presented in [23] achieves a maximum reflection coefficient of -33 dB at a resonance frequency of 14.13 GHz. It also achieves below -10 dB, a bandwidth of 2.5 GHz from 12 GHz to 14.5 GHz with an average gain of 8 dB over the entire band range of 12 GHz to 14.5 GHz.…”

A Stacked Microstrip Antenna Array with Fractal Patches

“…For example, the 8-layer stacked patch unit assembly allows for great bandwidth which is more than 50% of the center frequency [3] and the use of high dielectric constant substrate for the driven layer and low dielectric constant substrate for the superstrate can offer more than 25% on bandwidth [4,5]. The intrinsic properties of fractal geometries are conducive to the miniaturization of antenna size and realization of multiband or broadband characteristics [6,7]; L-shape slot loaded broadband patch antenna for enhancing the gain without affecting the broadband impedance matching characteristics [8]; the artificial magnetic conductor structures are employed as the antenna magnetic ground plane for bandwidth enhancement and radiation gain improvement of patch antenna [9]. A dipole antenna with a double electromagnetic band gap (EBG) reflector is presented for wide operating bandwidth and high gain [10].…”

A Novel Two-Layer Stacked Microstrip Antenna Array Using Cross Snowflake Fractal Patches

“…Electromagnetically coupled feed and aperture coupled feed can be used for antennas usually to achieve improved impedance bandwidth [2][3][4][5][6][7][8][9][10][11]. One of the popular techniques is the use of a multilayer structure which is consisting of several parasitic radiating elements to increase the impedance bandwidth, for example, by assembling the aperture coupling and especially the 8 layers stacked patch unit allows a great bandwidth which more than 50% of the center frequency [12]; another popular technique is the use of high dielectric constant substrate for the driven layer which prevents the unwanted radiation as well as low dielectric constant substrate is used for the superstrate, the structure can offer more than 25% bandwidth for one patch unit than the original design [13].…”