A singly-fed dual-band circularly polarized dielectric resonator antenna (DRA) is investigated in this paper. It makes use of the fundamental TE111mode and higher-order TE113mode of a rectangular DRA for the dual band design. The DRA has a square cross section. It is excited by a single micro strip line-fed rectangular slot fed. To generate circularly polarized (CP) fields, two corners of the D...

This paper proposes a double negative metamaterial surface as a superstrate for a multilayer cylindrical dielectric resonator antenna (MCDRA). The aim is to achieve a broadband and high gain Electromagnetic Band Gap (EBG) antenna that can be used in harsh propagation areas to satisfy all the requirements for the 60GHz wireless communications offering a bandwidth of 7GHz in the unlicensed ISM ba...

In this paper, we propose a method to use 1-D dielectric slabs, instead of metallic Frequency Selective Surfaces (FSSs), to produce Partially Reflective Surfaces (PRSs) with positive reflection phase gradients. The structure is realized by a single kind of dielectric substrate. It is modeled as cascaded transmission lines and then analyzed by virtue of the Smith Chart from the perspective of im...

Hwang, Huan-Sheng A Two Dimensional Quasi-Optical Microwave Power Combining System Based On A Dielectric Slab Under the direction of Michael B. Steer A quasi-optical (QO) power combining system based on a two dimensional hybrid dielectric slab beammode waveguide (HDSBW) with solid-state devices is demonstrated. This 2D QO system can serve as a planar resonator or a planar amplifier system, in w...

This article presents a novel dielectric resonator antenna (DRA) with an eight-port feeding system offering gain and polarization diversity. The single-antenna unit is defined by square arrangement of four aperture coupled slots (ACSs), hybridized the radiation resonator. Basically, atypical layout, realized two microstrip transmission lines driving each ACSs (thus requiring total eight feed li...

The temperature sensor presented in this paper is based on a microwave dielectric resonator, which uses alumina ceramic as a substrate to survive in harsh environments. The resonant frequency of the resonator is determined by the relative permittivity of the alumina ceramic, which monotonically changes with temperature. A rectangular aperture etched on the surface of the resonator works as both...

Miniature 310μm tall copper-air rectangular coaxial lines (RCL) with the inner conductor supported by periodic dielectric straps are demonstrated in this paper. The measured line loss is about 0.2dB/cm at 26GHz, while the isolation between two parallel lines with a center-to-center separation of 700μm is better than 60dB. Several quasi-planar components are designed and fabricated on the same w...

A miniaturized, multi-band and circularly polarized (CP) antenna with high Front-to-Back-Ratio (FTBR) in the L1 band for global navigation satellite systems (GNSS) is developed this paper. The proposed CP consists of four dielectric substrates, each which forms a folded monopole parasitic inverted-L frequency bands (L1/L2/L5/L6). To improve FTBR, microstrip resonator situated multi-layer substr...

Proof of concept of a cavity backed slot antenna based on inverted microstrip gap ‎waveguide (IMGW) technology is presented. Since the antenna is operating based on the ‎first resonating mode of the cavity, it is more compact compared to the ordinary cavity ‎backed slot antennas in which the second cavity mode is used for radiation. Furthermore, ‎the proposed antenna element introduces lower lo...