Implementing the single/multiport tunable terahertz circularly polarized dielectric resonator antenna

Tuning the higher to lower order resonance frequency ratio and implementing the tunable THz MIMO/self-diplexing antenna

Excitation of Higher Order Modes in Terahertz Antenna Using Graphene Strip

For several years, the fields of new technologies have been experiencing a real boom. The use of the terahertz band is an appropriate solution to meet the requirements of these technology. However, this technology has special requirements among which its antennas must have high bandwidth of few THz and achieve high gain for high productivity. In this paper, we will focus on the design and analysis of an antenna for THz technology. The antenna structure proposed in this work has better performance in terms of bandwidth and gain. In fact, multiples slots were added to the antenna to enhance the antenna’s bandwidth. In addition, to enhance the antenna performance in terms of gain and protect the antenna feed line against environmental jeopardies a thin layer as superstrate is used. The suggested antenna covers a wide −10 dB bandwidth from 0.9 to 17.3 THz with a peak gain of 12.8 dBi. Moreover, a VSWR less than 2 at the operating band is obtained. Furthermore, the suggested antenna has circular polarized radiations with an axial ration (AR) less than 3 dB over a wide band 13.6–17.3 THz which mean that the proposed antenna is well suited for application where the transmitter and receiver are moving which is the most case for wireless system. Thus, the suggested THz antenna could be a successful choice for terahertz application like future high-speed short-range indoor wireless communication, explosive detections, arms detection, medical imaging, pharmaceutical analysis, and material characterization in the THz regime industrial inspections. 

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A circularly polarized wideband high gain antenna for THz wireless applications

Dual-band terahertz dielectric resonator antenna with graphene loading

Tunable Terahertz Dual-Band Circularly Polarized Dielectric Resonator Antenna

A tunable terahertz (THz) dielectric resonator (DR) antenna (DRA) with circular polarization operating with multiple higher order modes is numerically studied and implemented. A rectangular DRA (RDRA) is designed with a length to width aspect ratio of the DR allowing the operation with the higher order modes. The RDRA provides the triple band response. The corners of the rectangular DR are perturbed diagonally and the generated electric and magnetic dipoles are controlled in the manner that the operating bands can be merged. The merging of the operating bands provides a wide impedance bandwidth. Also, the diagonal perturbation of the rectangular DR generates the orthogonal degenerate components of the operating modes which results in circular polarization. The different faces of the perturbed DR are coated with the graphene material. This allows the controlling of impedance matching and helps in achieving the wide overlapping impedance and axial ratio (AR) bandwidth along with the tunability. The antenna provides $$9.99\mathbf{\%} (3.3688-3.7232 \boldsymbol{T}\boldsymbol{H}\boldsymbol{z})$$
 impedance bandwidth and $$1.814\mathbf{\%} \left(3.6707-3.7379 \boldsymbol{T}\boldsymbol{H}\boldsymbol{z}\right)$$
 3 dB AR bandwidth. The higher order modes result in providing the high gain of around 8 dBi and radiation efficiency around 80 %.

Vishwanath

Papers

Tunable Terahertz Dual-Band Circularly Polarized Dielectric Resonator Antenna

Implementing the single/multiport tunable terahertz circularly polarized dielectric resonator antenna

Tunable Terahertz Circularly Polarized Dielectric Resonator Antenna with the Higher Order Modes

Controlling the resonant modes/bandwidth using graphene strip and isolation enhancement in a two-port THz MIMO DRA