A superstrate loaded aperture coupled dual-band circularly polarized dielectric resonator antenna for X-band communications

Abstract

A superstrate loaded cylindrical dielectric resonator antenna is developed and demonstrated for dual-band circular polarization. The proposed antenna employs a microstrip-fed rotated cross-shaped slot coupling technique for exciting the dielectric resonator (DR). The design is developed in a straight forward way. Firstly, the DR is coupled with a conventional plus-shaped slot and operates in linear polarization mode at 7.4 and 11.2 GHz. Secondly, the slot is rotated by 10° to enable out-of-phase excitation and ensure circular polarization at the above-mentioned frequencies. In the third step, a square dielectric superstrate is placed above the DR which creates multiple reflection and enhance the gain up to ~8 dBi in both the frequencies without affecting other performances. The development stages are discussed in detail. The proposed design is demonstrated through prototype fabrication and characterization. This antenna can be used for X-band satellite communications.

Dual‐metasurface‐based wideband antenna

“…We calculated the distance between the radiator and the first metasurface based on a previous study, 17 and then used CST to optimize the design. Finally, a reasonable value that satisfies both bandwidth and gain was obtained, that is, h air = 5 mm.…”

Synthesizing Radiation Properties of Dual-band Dual-mode High Gain Dielectric Resonator Antenna for Wireless Applications

“…This method is not suitable for all applications due to the limitation of the compact installation platform. Therefore to solve these issues, varieties of gain enhancement techniques, such as the use of electromagnetic bandgap (EBG) structure [17], metallic cap [18], different feeding mechanisms [19], stacked configured of different layers [20], frequency selective surfaces (FSS) [21], and superstrate layer [22][23][24][25][26], are developed by researchers. In most of the reported articles, it is observed that the gain enhancement at the lower frequencies by maintaining the miniaturized dimension becomes a challenging task.…”

“…The use of a dual-band FSS with bandpass response as a superstrate above the DRA is one of the reported techniques for gain improvement in both the operating bands [21]. Dual-band characteristics in superstrate loaded cylindrical DRA are reported with enhanced gain performance [22], whereas by placing a thin dielectric material as intermediate layer between antenna and feed network along with dielectric material as superstrate at top of radiator [23], the combination of superstrate with reflector [24] can be used to design a wideband DRA with improved gain characteristics. Though all these techniques [17][18][19][20] are very effective for the gain improvement of the traditional DRA, sometimes dealing with different challenging issues like stacking of different layers, precision fabrication, etc., improper arrangements or modifications in the DRA structure may lead to affecting the quality factor.…”

“…Though all these techniques [17][18][19][20] are very effective for the gain improvement of the traditional DRA, sometimes dealing with different challenging issues like stacking of different layers, precision fabrication, etc., improper arrangements or modifications in the DRA structure may lead to affecting the quality factor. The techniques summarized in [21][22][23][24] improve the radiation characteristics without much affecting the other performances, but investigation on these techniques is limited, which needs to be extended further.…”

Novel Design and Characterization of Wide Band Hook Shaped Aperture Coupled Circularly Polarized Antenna for 5g Application

“…This feeding mechanism is useful since the optimization of the feed position and radiating patch design are carried out independently. Various apertures have been proposed in the literature, such as cross slot, C-shaped slot, square slot ring, and square slot to couple the power to various shapes of patches [10][11][12][13][14][15][16][17]. In this paper, a novel three-layer hook-shaped aperture coupled antenna structure is discussed for 5G applications, with improved bandwidth, gain, and axial ratio.…”