2 edition of Cylindrical dielectric resonator antennas found in the catalog.
Cylindrical dielectric resonator antennas
|Statement||George Drossos ; supervised by Z. Wu and L.E. Davies.|
|Contributions||Wu, Z., Davies, L. E., Electrical Engineering and Electronics.|
The main purpose of this book is to embed mathematical EM theory of dielectric resonator antennas with experimental validation so that understanding of concepts takes place. Initially, basic understanding of philosophy of dielectric resonators has been discussed, then it is supported with mathematical modeling and later same is implemented with. A planar Ultrawideband (UWB) integrated with multi narrowband cylindrical dielectric resonator antenna (CDRA) for cognitive radio (CR) application is addressed. In this communication the proposed design is composed of two different antennas with different feeding mechanisms.
DIELECTRIC RESONATOR ANTENNAS The DRA is an open resonating structure, fabricated from a low loss microwave dielectric material. Dielectric resonators (DR’s) have proved themselves to be ideal candidates for antenna applications by virtue of their high radiation efficiency, flexible. The recent advances in millimeter-wave communications have called for parallel development of compact and efficient antennas. This paper addresses the design and performance of a high gain on-chip cylindrical dielectric resonator antenna on conducting silicon. The integrated antenna has a return loss of 46 dB, with an impedance bandwidth of MHz at GHz, while the gain and radiation.
Abstract—A wideband high gain circularly polarized layered cylindrical dielectric resonator antenna (DRA) that operates in a higher order mode is proposed in the X-band frequency range. The antenna consists of two dielectric layers having diﬀerent dielectric constants and radii. The results demonstrate. Introduction to Dielectric Resonator Antennas - Brief History of Dielectric Resonator Antennas. Major Characteristics. Outline of the DRA Handbook.; Simple-Shaped Dielectric Resonator Antennas - The Hemispherical DRA. The Cylindrical DRA. The Rectangular DRA.; Coupling to DRAs - Coupling Coefficients. Fields within Rectangular and Cylindrical DRAs.
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Dielectric Resonator Antennas are becoming very attractive in many applications in today's technology. This work emphasizes on the half cylindrical dielectric resonator antennas applied in the /GHz WLAN.
It also explains the principles of dielectric resonator antennas and offers a simplified theoretical understanding of the modes excited Format: Paperback. Abstract: For the first time, a pattern-diversity cylindrical dielectric resonator (DR) antenna (DRA) is designed using the fundamental HEM 11δ and TM 01δ modes of the HEM and TM mode families, respectively.
It makes use of the fact that at the center of the DR, the E-field of the HEM 11δ mode is weakest but that of the TM 01δ mode is strongest. Therefore, increasing the dielectric Cited by: 1.
A dielectric resonator antenna (DRA) is a radio antenna mostly used at microwave frequencies and higher, that consists of a block of ceramic material of various shapes, the dielectric resonator, mounted on a metal surface, a ground waves are introduced into the inside of the resonator material from the transmitter circuit and bounce back and forth between the resonator.
Two books, Petosa Aldo, Dielectric resonator antenna handbook, and Kwai-Man Luk, DIelectric resonator antenna, got the equations for for microstrip lines, ADS, Polar Si, and other. Today, more and more antenna engineers are viewing the Dielectric Resonator Antenna (DRA) as a preferable alternative to conventional low-gain designs because of several attractive features, including high radiation, light weight, small size and low profile.
This practical resource presents complete, up-to-date details on DRAs in a single volume. dielectric resonator antennas of different geometries; in particular Chapter 2 on rectangular shapes, Chapter 3 on hemispherical shapes and Chapter 4 on cylindrical shapes.
A wideband and high gain dielectric resonator antenna (DRA) operating in hybrid HEM 11 δ mode is proposed. The investigated geometry employs one cylindrical dielectric resonator partially covered with a transparent dielectric superstrate and backed up by a single side metal coated dielectric reflector plane.
The reflector is dedicated for gain enhancement while the superstrate is employed for. The use of a dielectric resonator as a resonant antenna was proposed in Due to the absence of metallic loss, the dielectric resonator antenna (DRA) is highly efficient when operated at millimetre wave frequencies.
A dielectric resonator is a piece of dielectric (nonconductive) material, usually ceramic, that is designed to function as a resonator for radio waves, generally in the microwave and millimeter wave bands. The microwaves are confined inside the resonator material by the abrupt change in permittivity at the surface, and bounce back and forth between the sides.
In this paper, a hybrid dual-band cylindrical dielectric resonator antenna with parasitic slot fed by a microstrip line that is suitable for wireless body area network is proposed. In this configuration, the dielectric resonator performs the functions of an effective radiator along with the feeding structure and the slot in the ground plane.
Abstract: Novel cylindrical dielectric resonator antennas (DRAs) having supershaped base contour and adopting plastic materials for the resonator are studied. The specialization of the supershaped DRAs to the generation of linearly and circularly polarized waves is discussed, analyzed and experimentally verified.
A new geometry of ultra-wideband (UWB) hollow dielectric resonator antenna (DRA) has been designed, simulated, and fabricated. The antenna consists of a rectangular dielectric resonator and excited by a transformer type microstrip feedline.
A hollow cylindrical-shaped structure is extracted from a rectangular DR to improve the gain and impedance bandwidth of the antenna.
cylindrical dielectric resonator antennas. -compact The most design (in terms of wavelengths) was a top-loaded cylindrical dielectric resonator antennaresonant at MHz, with a diameter of 0, and a height ofλ. λ 0. More-compact designs should be possible by usinga combination of metal loading and high dielectric substrates.
ISBN: OCLC Number: Notes: About the Author Index Description: 1 online resource ( pages) Contents: Dielectric Resonator Antenna Handbook; Contents v; Preface ix; Acknowledgments xi; Chapter 1 Introduction to Dielectric Resonator Antennas 1; BRIEF HISTORY OF DIELECTRIC RESONATOR ANTENNAS 1; MAJOR.
Cylindrical DRA. Cylindrical DRAs have been studied extensively in literature. Figure 2 shows the three-dimensional view (a) and the cross-sectional view (b) of a probe-fed cylindrical DRA. The antenna consists of a cylindrical dielectric resonator (DR) with height, radius, and dielectric DR is placed on top of a ground plane and fed by a coaxial connector.
Dielectric resonators using high-permittivity materials were originally developed for microwave circuits, such as filters or oscillators as tuning element .Indeed, in the late nineteen sixties, the development of low-loss ceramic materials opened the way for their use as high-Q elements .Then, making use of dielectric materials to create the dielectric resonator antenna (DRA.
The use of a dielectric resonator as a resonant antenna was proposed in Due to the absence of metallic loss, the dielectric resonator antenna (DRA) is highly efficient when operated at millimetre wave frequencies.
With the use of high dielectric constant material, the DRA can also be used as a. Dielectric resonator antennas (DRA) are ceramic based materials that are nonmetallic in nature. They offer high permitivity values (εr: ).
DRAs. have made their mark in various applications specially in the microwave and millimeter wave (MMW) spectrum, and are making encouraging progress in the THz band, because of their low conduction losses and higher radiation. Cylindrical DRA. Cylindrical DRAs have been stud-ied extensively in literature.
Figure shows the three-dimensional view (a) and the cross-sectional view (b) of a probe-fed cylindrical DRA. e antenna consists of a cylindrical dielectric resonator (DR) with height, radius, lacedontopofaground. CYLINDRICAL DIELECTRIC RESONATOR ANTENNA FED BY A STAIR SLOT IN THE GROUND PLANE OF A MICROSTRIPLINE H.
RAGGAD 1, M. LATRACH 1, T. RAZBAN 2 and A. GHARSALLAH 3 1 Groupe Radio & Hyperfréquence, ESEO, 4 Rue Merlet de la Boulaye, BPAngers, France @ and [email protected]
Characteristic Modes by Yikai Chen,available at Book Depository with free delivery worldwide.Dielectric Materials for Compact Dielectric Resonator Antenna Applications 29 A number of modes can be excited within the DRA, many of them provide dipolar-like radiation characteristics.
The most common targeted frequencies presented by the research literatures are ranging from 1GHz to 40 GHz.The authors introduce a miniature and gain enhancement method of dielectric resonator antenna (DRA) using a metallic cap.
The structure of the proposed antenna consists of a stacked cylindrical dielectric resonator, a metallic cap that is located on the resonator, and a ground plane.