Gain enhancement of dielectric resonator loaded waveguide antennas with dielectric overlays

Hakkak, Mohammad; Ameri, Hoda

doi:10.1049/el:19920341

Cited by 9 publications

(9 citation statements)

References 4 publications

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“…Various gain-enhancement techniques for antennas have been studied in the past decades [1][2][3][4][5]. One of the most commonly used methods for this purpose is to construct an array of identical antenna elements, such as described in [6].…”

Section: Introductionmentioning

confidence: 99%

Radiation of High-Gain Cavity-Backed Slot Antennas Through a Two-Layer Superstrate

Tan

Shen

Shao

2008

IEEE Antennas Propag. Mag.

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The radiation of cavity-backed slot (CBS) antennas through a two-layer superstrate is studied in this paper. A novel transmission-line model is proposed to explain the gain-enhancement effect of the superstrate on cavity-backed slot antennas. Experimental result showed that a single cavity-backed slot antenna can achieve a high gain of 16.7 dBi through a properly designed superstrate, and this gain-enhancement property is valid for array configurations, as well. A rotationally arranged four-slot array, covered by the superstrate, is also investigated, to demonstrate that good circular polarization and high gain can be obtained from the superstrate-covered slot antennas.

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Section: Introductionmentioning

confidence: 99%

Radiation of High-Gain Cavity-Backed Slot Antennas Through a Two-Layer Superstrate

Tan

Shen

Shao

2008

IEEE Antennas Propag. Mag.

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“…These efforts resulted in a gain improvement of up to 2.7 dB over a single DRA element. Hakkak and Ameri [7] have achieved a 7 dBi gain from a dielectric 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.…”

Section: Introductionmentioning

confidence: 99%

“…The most common mechanical structures are the cantilever and the air Bridge. Each type of switch has certain advantages in performance or manufacturability [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of the RF MEMS switch can be carried out by the present approach in conjunction with Moments Method [5], HFSS [6], and TLM [7]. Even through the latter approaches provide good results, the wave concept iterative procedure method intervenes with its three predominant advantages: simplicity in use, no limitations in form of structure and reduce the number of interface by the introduction of adequate boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

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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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“…Hakkak and Ameri [6] have achieved a 7-dBi dB gain from a dielectric resonator loaded waveguide antenna with parasitic dielectric directors. However, this structure is very long and hence not suitable for compact antenna applications.…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Compact Microwave Antenna with High Gain

Nasimuddin

Weily

Verma³

2005

2005 18th International Conference on Applied Electromagnetics and Communications

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We demonstrate a novel, low-profile, compact antenna consisting of a rectangular dielectric resonator and a quasi-planar surface mounted horn. The proposed structure shows a gain of 8.5 dBi at 6.0 GHz, giving a 4.9 dB increase compared to the standard dielectric-resonator antenna (DRA) without a surface mounted horn. Total height of the fabricated structure is only 0.172 λ 0 , or 8.61 mm at 6.0 GHz, and the aperture size is 0.96 λ 0 × 0.86 λ 0, or 48.1 mm × 43.1 mm. The cross-polarization level of the antenna is less than 33 dB in both E-and H-planes.

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Gain enhancement of dielectric resonator loaded waveguide antennas with dielectric overlays

Abstract: Ref er e e es I REINEIX, A., and JECKO, B.: 'Analysis of microstrip patch antennas using finite difference time domain method,

Cited by 9 publications

References 4 publications

Radiation of High-Gain Cavity-Backed Slot Antennas Through a Two-Layer Superstrate

Radiation of High-Gain Cavity-Backed Slot Antennas Through a Two-Layer Superstrate

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

A Low-Profile Compact Microwave Antenna with High Gain

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