Topic
Dielectric resonator antenna
About: Dielectric resonator antenna is a research topic. Over the lifetime, 8199 publications have been published within this topic receiving 111090 citations. The topic is also known as: DRA.
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TL;DR: In this paper, the authors proposed a circular slot ultrawideband (UWB) antenna with multimode reconfigurable dual band-notched characteristics by using a two-stage T-shaped stepped impedance resonator and a parallel stubs loaded resonator (PSLR).
Abstract: In this article, we propose a circular slot ultrawideband (UWB) antenna with multimode reconfigurable dual band-notched characteristics. By using a two-stage T-shaped stepped impedance resonator (TS-TSIR) and a parallel stubs loaded resonator (PSLR), dual band-notched function is achieved to reject worldwide interoperability for microwave access, WLAN, and X-band signals. The multimode reconfigurable band-notched characteristic is realized by integrating four switches onto the TS-TSIR and the PSLR. Simulated and measured results show that this antenna, with multimode reconfigurable characteristics and dual band-notched function, can operate from 2.7 to 12 GHz (VSWR<2), which includes the entire UWB band. This antenna maintains omnidirectional radiation patterns that is suitable for UWB applications. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:570–574, 2014
43 citations
43 citations
TL;DR: In this paper, a single coaxial probe is used to excite circularly polarized patterns in a superquadric dielectric resonator antenna, and different aspect ratios for each squareness parameter for circular polarization are calculated.
Abstract: Circularly polarized superquadric dielectric resonator antenna is investigated. A single coaxial probe is used to excite circularly polarized patterns. Finite element method is used to analyze the problem. Different aspect ratios of the superquadric dielectric resonator cross section for each squareness parameter for circular polarization are calculated.
43 citations
01 Dec 2007
TL;DR: In this article, the authors demonstrate a 1.1 GHz MEMS resonator operating in fundamental mode occupying a chip area of only several mum2. The resonator is excited by means of an electrostatic force and the mechanical motion is detected using the piezo-resistive properties of Si.
Abstract: This paper demonstrates a 1.1 GHz MEMS resonator operating in fundamental mode occupying a chip area of only several mum2. To our knowledge this is the smallest and first fundamental mode Si resonator operating above 1 GHz. The resonator is excited by means of an electrostatic force and the mechanical motion is detected using the piezo-resistive properties of Si. The effective impedance at resonance is orders of magnitude lower than the impedance obtained using the more common capacitive or field effect read-out. More importantly, its effective impedance is in principle insensitive to uniform and directional geometric scaling.
43 citations
TL;DR: In this paper, a hybrid dielectric resonator antenna (DRA) excited by a monopole antenna is proposed and implemented to enhance the antenna performance in terms of bandwidth and to create a dipole-shape radiation pattern.
Abstract: A new hybrid dielectric resonator antenna (DRA) excited by a monopole antenna is proposed and implemented. In this structure, three different methods of impedance matching, dielectric, and ground plane shaping are applied to enhance the antenna performance in terms of bandwidth and to create a dipole-shape radiation pattern. The effect of each method to increase the input impedance bandwidth is carefully investigated by an extensive parametric study. The resonant frequencies of the structure are also described and determined. The proposed structure provides more than 5-GHz bandwidth for 10dB return loss ranging from 1.8 to 6.9 GHz. Measurements as well as 3-D simulations were carried out for return loss and antenna radiation pattern, and they show a good agreement.
43 citations