Conductor Backed CPW-Fed Dual-Mode Excited High Gain Cylindrical Cavity DRA for Unmanned Aircraft Systems (UAS) or Drone Data-Link Applications at C Band

A Filtering Dielectric Resonator Antenna Using CPW-Fed for Sub-6 GHZ Applications

“…Additionally, DRA can be easily excited by different feeding methods, such as coaxial probe [12], slot-coupled microstrip [13], microstrip [14], and coplanar waveguide (CPW) [15]. Compared with traditional microstrip feed, CPW has the characteristics of low loss and small dispersion, which provides a more efficient excitation mechanism for DRA [16].…”

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 same DRA structure can be used to excite different modes by applying different feeding techniques. As explained in [19], one of the common techniques is the use of a coplanar waveguide feeding, which can directly generate a wide bandwidth with boresight radiation characteristics of DRA. Using a cylindrical dielectric resonator (CDR), an intermediate layer, and a metallic cylinder together, significant improvement of bandwidth and gain can be achieved by minimizing surface wave [20].…”

“…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. 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.…”