Investigation of low profile, conformable, dielectric resonator antennas

Fasenfest, B.J.; Walsh, Aaron M.; Young, Chelsie M.; Kennedy, Timothy; Long, Stuart A.; Williams, J.T.

doi:10.1049/el:20030039

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…The transfer range at which efficiency exceeds 50% increases by 2.5 times for the single-sided PSS system and by 5.5 times for the doublesided PSS system compared with the conventional system. Magnetically coupled wireless power transfer (WPT) has applications in consumer electronics, biomedical devices, and industrial equipment [1][2][3]. In these applications, to allow unrestricted use of moving devices, the wireless transfer range must be expanded.…”

Section: Resultsmentioning

confidence: 99%

“…IN recent years, dielectric resonator antennas (DRAs) have attracted much attention owing to their attractive features such as small size, low loss at high frequency, wider impedance bandwidth, high temperature tolerance, no excitation of surface waves etc [1][2][3]. As the ohmic loss in conventional metallic antennas increases as frequency increases, the DRAs are very useful for high frequency applications.…”

Section: Introductionmentioning

confidence: 99%

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Radar target identification using one-dimensional scattering centres

Kim¹,

Seo

Kim

2001

IEE Proc., Radar Sonar Navig.

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methods as well as with the conventional OMP by adopting the ER SCE and the MSE RP as the performance measures. The results showed that the accuracy of the proposed method is better than that of the other methods with an incomplete RCS dataset with missing data as well as with a complete RCS dataset under noisy environment. In addition, we experimentally found that the l 1 -norm optimization for sparse recovery provides poor performance in terms of SCE accuracy and, therefore, it is not suitable for obtaining a robust performance for SCE accuracy. Another advantage of the proposed method was that the estimated nSC can be automatically found by the residual and the stopping criterion. Therefore, we can establish that the proposed method also accomplishes robust detection of dominant scattering centers, even when using the incomplete RCS dataset.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Radar target identification using one-dimensional scattering centres

Kim¹,

Seo

Kim

2001

IEE Proc., Radar Sonar Navig.

View full text Add to dashboard Cite

show abstract

“…IN recent years, dielectric resonator antennas (DRAs) have attracted much attention owing to their attractive features such as small size, low loss at high frequency, wider impedance bandwidth, high temperature tolerance, no excitation of surface waves etc . As the ohmic loss in conventional metallic antennas increases as frequency increases, the DRAs are very useful for high frequency applications.…”

Section: Introductionmentioning

confidence: 99%

Gain enhancement of a dual-polarized dielectric resonator antenna using polarization independent FSS

Rana

Chatterjee

Parui

2016

Microw. Opt. Technol. Lett.

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A dual‐polarized dielectric resonator antenna (DRA) fed by two orthogonal microstrip lines has been explored employing coupled‐resonator spatial filter (CRSF) frequency selective surface (FSS) as superstrate which, to the best of our knowledge, is reported for the first time. The DRA with εr = 20 has been used as a primary radiator, excites fundamental TE111 mode. A CRSF FSS has been placed above the ground plane at a distance of half wavelength and a 3.4 dBi increased gain has been found compared to the gain without FSS. Using Arlon AD270 both the antenna and the FSS have been fabricated and experimental measurements have been carried out. The proposed antenna with FSS offers an impedance bandwidth of 5.1% covering frequency from 6.4 to 6.74 GHz with a maximum gain of 8.9 dBi at the resonant frequency for the port1. For the port2, the DRA with FSS resonates at 6.54 GHz with an impedance bandwidth of 5.3% covering frequency from 6.37 to 6.72 GHz. A good agreement has been observed between the measured and simulated results. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1415–1420, 2016

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“…Dielectric resonator antennas (DRAs) offer several advantages such as wide bandwidth, small size, ease of fabrication, and high radiation efficiency. A rectangular DRA can be designed as a compact, low profile antenna [1][2][3], but it suffers from low gain.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, MEMS switches offer much better performance than FET transistor and PIN diode [1,2]. Recently, several researches have made efforts on the development of miniaturized RF/microwave circuits with RF MEMS switches [3][4][5]. Hence, several different forms of MEMS switches have been developed.…”

Section: Introductionmentioning

confidence: 99%

Gain enhancement of a dielectric resonator antenna with use of surface mounted short horn

Nasimuddin

2007

Micro & Optical Tech Letters

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the switched buffer multiplexer, this work achieves the phase noise of less than Ϫ121 dBc/Hz at 1 MHz offset and the frequency tuning range of 10% while consuming 52.2 mW from a 1.8-V supply. ACKNOWLEDGMENTThe authors thank the Chip Implementation Center of the National Science Council, Taiwan, Republic of China, for supporting the TSMC CMOS process. This work was supported by Research Projects of the National Science Council, Taiwan, Republic of China, under Projects NSC 94 -2213-E-009 -051, and the National Chip Implementation Center. resonator loaded waveguide antenna with parasitic dielectric directors. However, in most cases the structures lack structural stability and are very large, and therefore, are not suitable to be used as compact antenna or as an array element. Recently, Abdel et al. GAIN ENHANCEMENT OF[8] used a surface mounted short horn (SMSH) to enhance the gain of a microstrip patch antenna. They have made a horn from PVC sheet ( r ϭ 3.38) and mounted it on the patch structure. The inner surface of the horn is painted with the conductive silver epoxy.In this study, we presented how the gain of an aperture-coupled rectangular DRA can be enhanced by integrating with a SMSH. We also study the effects of the material required to support the SMSH on antenna performance. The proposed configuration, where the aperture coupled DRA acts as a feed to SMSH, is mechanical stable, very simple, and easy to fabricate. We achieved a gain of 8.5 dBi at 5.95 GHz, and an impedance bandwidth of 3.2% with this configuration. The design and optimization has been carried out on the Microwave Studio, commercial 3D-EM software from Computer Simulation Technology (CST) [9]. DESIGN OF SMSH FOR GAIN ENHANCEMENTOur aim was to enhance the gain of a standard rectangular DRA by integrating it with a quasi-planar SMSH as shown in Figure 1(a). First, a rectangular DRA, with a rectangular coupling slot in the ground, and excited by a 50-⍀ microstrip line feed, was designed as in [1] to operate around 6 GHz.The rectangular DRA parameters are: length ϭ 12.8 mm; width ϭ 7.3 mm; height ϭ 6.35 mm; dielectric constant ϭ 9.8; and loss tangent ϭ 0.002. Slot coupled feeding structure dimensions are: slot length ϭ 6.4 mm; slot width ϭ 1.24 mm; stub length ϭ 1.6 mm; microstrip width ϭ 1.16 mm; substrate dielectric constant ϭ 3.38; loss tangent ϭ 0.0022 and thickness (h f ) ϭ 0.508 mm. This antenna has a theoretical gain 6 dBi at the operating frequency of 6 GHz, and a 10-dB return loss bandwidth from 5.90 to 6.07 GHz. Then the design of the SMSH was considered. For that purpose, first the base dimensions of the SMSH were set following Abdel et al.[8] and the horn taper angle () was set to 45°. As we preferred to keep the height of the SMSH as small as possible, then we investigated the effect of horn height (H) on gain, over the frequency range of interest. The variation of gain with height for three different frequencies (5.95, 6.0, and 6.05 GHz) is shown in Figure 2(a). The gain increases with increasing height up to H Ϸ 9 mm ϭ 0.15 0...

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Investigation of low profile, conformable, dielectric resonator antennas

Cited by 8 publications

References 3 publications

Radar target identification using one-dimensional scattering centres

Radar target identification using one-dimensional scattering centres

Gain enhancement of a dual-polarized dielectric resonator antenna using polarization independent FSS

Gain enhancement of a dielectric resonator antenna with use of surface mounted short horn

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