Reduced size metallized dielectric resonator antennas

Mongia, R.K.

doi:10.1109/aps.1997.625406

Cited by 33 publications

(35 citation statements)

References 6 publications

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“…It was shown in [11] that by covering the top surface of the rectangular DRA with a metallic patch, the resonant frequency can be reduced by 10%. Furthermore, investigations carried out by [12] showed that by incorporating a metallic cap on the top surface of a cylindrical DRA, the resonant frequency of the DRA can be reduced by 30.6%.…”

Section: Introductionmentioning

confidence: 99%

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Microstrip - Fed Low Profile and Compact Dielectric Resonator Antennas

Saed¹,

Yadla²

2006

PIER

128

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Abstract-This paper presents a novel broadband, low-profile dielectric resonator antenna using relatively low dielectric constant substrate material. The rectangular DRA is fed with a stepped microstrip feed to ensure efficient coupling. Bandwidths in excess of 17% are obtained. In addition, the paper investigates methods to miniaturize the antenna using metallic strips or patches. Substantial size reduction is demonstrated while maintaining a reasonable bandwidth. Simulations as well as experimental results are presented.

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Section: Introductionmentioning

confidence: 99%

“…If desired, dielectric resonator antennas can be made more compact, at the expense of reduction in bandwidth, by placing a conducting strip or patch on the top of the DRA [11,12,20]. It was shown in [11] that by covering the top surface of the rectangular DRA with a metallic patch, the resonant frequency can be reduced by 10%.…”

Section: Introductionmentioning

confidence: 99%

Microstrip - Fed Low Profile and Compact Dielectric Resonator Antennas

Saed¹,

Yadla²

2006

PIER

128

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“…A popular dielectric antenna is the dielectric resonator antenna (DRA), introduced as a radiating source in [6]. Much research has taken place with DRAs [7] and common methods to reduce the size is to introduce metal [8], or to increase the permittivity [9]. To date, the thinnest all-dielectric antenna reported in the literature is the dielectric resonator antenna (DRA) described in [10].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Thin 3d Printed All-Dielectric Antenna

Rodríguez

Ávila

Rumpf³

2016

PIER C

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Abstract-In this work we report an ultra-thin all-dielectric antenna that was designed, built, tested, and compared with simulated data. The objective of this research was to develop an antenna that is easily manufactured by common 3D printers available today. 3D printing is quickly revolutionizing manufacturing and the need to incorporate electrical elements like antennas is rising. Multi-material 3D printing that can build parts with conductors and dielectrics is the future, but at present it is very immature and largely inaccessible. The antenna presented here represents our first steps in developing all-dielectric antennas that can be manufactured today with commonly available 3D printers and materials. A monolithic antenna would have additional mechanical benefits when subjected to bending or thermal cycling. With this goal in mind, an ultra-thin all-dielectric antenna was developed. The antenna operates by taking advantage of total internal reflection and exciting a leaky whispering gallery mode. The antenna reported here operates at 2.4 GHz and was able to be as thin as 1.5 mm.

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“…2-4 Some researchers also explored resonators with a metallic "cap" that reduce the cavity's fundamental resonance frequency. 5,6 While most studies focus on microstrip or aperture coupled single cavity resonators, we consider here a two-dimensional array of closely spaced cavities, supporting resonances that provide strong absorption at frequencies determined by the geometry of the unit cell.The use of structured metal-dielectric interfaces to provide frequency selective absorption of incident radiation is certainly not new. For instance, the current authors investigated dual period bigratings 7 that provide efficient incident angle independent absorption.…”

mentioning

confidence: 99%

“…[2][3][4] Some researchers also explored resonators with a metallic "cap" that reduce the cavity's fundamental resonance frequency. 5,6 While most studies focus on microstrip or aperture coupled single cavity resonators, we consider here a two-dimensional array of closely spaced cavities, supporting resonances that provide strong absorption at frequencies determined by the geometry of the unit cell.…”

mentioning

confidence: 99%

Thin resonant structures for angle and polarization independent microwave absorption

Lockyear

Hibbins

Sambles

et al. 2009

Applied Physics Letters

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We present a microwave absorbing structure comprised of an array of subwavelength radius copper disks, closely spaced from a ground plane by a low loss dielectric. Experiments and accompanying modeling demonstrate that this structure supports electromagnetic standing wave resonances associated with a cylindrical cavity formed by the volume immediately beneath each metal disk. Microwave absorption on resonance of these modes, at wavelengths much greater than the thickness of the structure, is dictated almost entirely by the radius of the disk and permittivity of the dielectric, being largely independent of the incident angle and polarization. © 2009 American Institute of Physics. ͓DOI: 10.1063/1.3059568͔Research into resonant cylindrical dielectric cavity antennas ͑dielectric elements mounted on a metallic ground plane͒ was conducted in the microwave bands as early as 1983. 1 Since then a large number of theoretical and experimental investigations have been undertaken, resulting in a host of applications including microantennas for mobile communications and wireless networks. 2-4 Some researchers also explored resonators with a metallic "cap" that reduce the cavity's fundamental resonance frequency. 5,6 While most studies focus on microstrip or aperture coupled single cavity resonators, we consider here a two-dimensional array of closely spaced cavities, supporting resonances that provide strong absorption at frequencies determined by the geometry of the unit cell.The use of structured metal-dielectric interfaces to provide frequency selective absorption of incident radiation is certainly not new. For instance, the current authors investigated dual period bigratings 7 that provide efficient incident angle independent absorption. Other examples include Dallenbach layers 8 and Salisbury screens. 9 However, these types of surfaces are often limited to a minimum thickness of one quarter wavelength. While Hibbins et al. 10 and more recently Landy et al. 11 used structured metal-dielectric composites to overcome this thickness constraint, these structures provide a polarization dependent response. Here we investigate a periodic array of cavities that support resonant modes with no quantization requirement in the direction along the axis of the cavity. This allows the construction of an ultrathin and flexible structure whose electromagnetic ͑EM͒ response is not significantly perturbed by the angle or polarization of the incident beam. Such a surface has many applications in a wide variety of commercial sectors, from radar absorbing materials and EM shielding applications to increasing the energy transfer efficiency in solar cells. [12][13][14] The sample ͓Fig. 1͑a͒, inset͔ consists of a 500 ϫ 500 mm 2 polyester sheet ͑permittivity of = 3.2+ 0.01i and thickness of t sp = 100 m͒ coated on each side with a copper layer with thickness of t p =18 m. Copper is then removed from one surface via standard print and etch techniques to give a square array of circular disks with radius of a = 3 mm whose centers are spaced in the pl...

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Reduced size metallized dielectric resonator antennas

Cited by 33 publications

References 6 publications

Microstrip - Fed Low Profile and Compact Dielectric Resonator Antennas

Microstrip - Fed Low Profile and Compact Dielectric Resonator Antennas

Ultra-Thin 3d Printed All-Dielectric Antenna

Thin resonant structures for angle and polarization independent microwave absorption

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