Design of Short Axial Length High Gain Dielectric Rod Antenna

High-gain characteristics of a slightly flared dielectric tube antenna

“…This antenna can be regarded as a combination of a dielectric sphere antenna [4] and a classical dielectric tube antenna [5], and also as an extension of a dielectric-loaded circular waveguide antenna [6]. Although a similar but different approach has been reported by Kumar et al, they paid attention to a short tube antenna with the axial length being a few wavelengths [7]. In this article, to obtain a high gain, we propose a flared tube antenna whose length is more than ten wavelengths.…”

A high gain and simple-structured dielectric resonator antenna array with cylindrical rods and microstrip feeding

“…Hence the circular patches, circular metallic waveguides and dielectric rods are not only flowing routes of electromagnetic energy, but also mode converters. For dielectric rod antennas, they are commonly designed to have single-mode propagation and the HE 11 mode is used most often [4,5,[7][8][9][10]14]. Some researches pointed out, when dielectric rod antennas work under the HE 11 mode, low side-lobe and end-fire radiation can be obtained [8][9][10][11][12][13][14][15].…”

“…In recent years, dielectric resonator antennas have become an attractive choice for many modern wireless communications systems due to their advantages such as small size [1][2][3][4], wide impedance bandwidth [5][6][7][8][9], high radiation efficiency [10][11][12], etc. But so far in the large numbers of previous researches, dielectric resonator antennas are commonly made of high permittivity materials [1][2][3] that are often expensive.…”

“…But so far in the large numbers of previous researches, dielectric resonator antennas are commonly made of high permittivity materials [1][2][3] that are often expensive. In many antennas, dielectric rods that act as radiation elements are with tapered [7][8][9] or other more complicated configurations [4,5], which bring forth difficulties for antennas' design and fabrication. Some antennas are fed by a waveguide [3][4][5]8,10], an embedded probe [10], or a horn [13,14], which are not only difficult to be fabricated into modern devices but also may be bulky and expensive for a large array.…”

60-GHz wideband branchline coupler and patch antenna with dielectric rod for full-duplex gigabit wireless communication

“…The small form factor means that the antenna system can be integrated in a small form-factor device or apparatus such as the robot arm where the feature of rotational freedom is required. To further reduce the form factor, an axially shorter dielectric rod antenna has been proposed in [3], yet the lateral dimension of the dielectric structure is traded off.…”