Optimization of a Gangbuster Reflectarray Antenna

Mussetta, Marco; Pirinoli, Paola; Bliznyuk, N.; Engheta, Nader; Zich, R.E.

doi:10.1109/aps.2005.1552331

Cited by 4 publications

(3 citation statements)

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“…However, the single antenna and the 2 × 2 array antenna have reflection coefficient close to −10 dB level around 60 GHz, at the same time the shared array antenna reflection coefficient level is less than −15 dB. The relatively high level for the single and 2 × 2 array antennas can be explained by fabrication errors; the single antenna sample presented in [15], was manufactured using the same materials and processes, and has much better agreement with simulated reflection coefficient. Additional losses in the bent feed line increase the single antenna impedance bandwidth, making it wider than for the shared array antenna, and eliminate the effect of bandwidth widening due to the mutual coupling, which was discovered in the simulation.…”

Section: Reflection Coefficientmentioning

confidence: 94%

“…Even if the array element size itself exceeds this distance, sometimes the element geometry features can be used to keep a small distance between the elements. One example is a dipole antenna array: if the dipoles are tilted or placed on different levels, then it is possible to pack them closely, however, the capacitive coupling between the dipole arms will be increased [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Gridded parasitic patch stacked microstrip array antenna for 60 GHz band

Bondarik

Sjöberg

2020

IET Microwaves, Antennas & Propagation

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An array antenna design based on a gridded parasitic patch stacked microstrip antenna element is presented. The radiating part in the top layer of one antenna element has nine rectangular metal patches placed in a grid with three rows and three columns with a separation of 0.1 mm between the patches. Two means of realising the array are investigated. In a regular 2×2 concept, the parasitic patches of individual elements are placed next to each other, forming on the top layer a uniform grid of parasitic patches with six rows and six columns. In an alternative concept named as shared array, neighbouring antenna elements share one row and one column of parasitic patches, forming on the top layer a uniform grid of parasitic patches with five rows and five columns. The antenna arrays are designed for the 60 GHz band. The measured bandwidth is 13.8 GHz for the single antenna, 15.3 GHz for the 2×2 array, and 12.4 GHz for the shared array. The measured realised gain at 60 GHz is 6 dBi for the single antenna, 11 dBi for the 2×2 array, and 10.5 dBi for the shared array. The measured radiation patterns have good agreement with simulations.

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Section: Reflection Coefficientmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Gridded parasitic patch stacked microstrip array antenna for 60 GHz band

Bondarik

Sjöberg

2020

IET Microwaves, Antennas & Propagation

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“…Since then, it has attracted increasing attention due to its unique and outstanding property. Numerous numerical studies on its performance and applications have been conducted [3][4][5][6][7][8][9][10][11][12]. However, literature survey shows that little experimental study has been reported.…”

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confidence: 99%

Experimental study on frequency selective surface with gangbuster array

Qing

2006

Micro & Optical Tech Letters

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Experiment provides the most convincing justification of numerical studies. A frequency selective surface (FSS) with Type-2 gangbuster array is fabricated and measured. The measurement results agree well with numerical results. An FSS with regular y-directed dipole array is also fabricated and measured. The bandwidth of the former isobserved much wider than that of the latter. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2421-2425, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ mop.21967Key words: frequency selective surfaces; gangbuster INTRODUCTIONA frequency selective surface (FSS) with gangbuster array was put forward by Kornbau in his dissertation in 1984. It was introduced to the public by Munk [1, 2]. Since then, it has attracted increasing attention due to its unique and outstanding property. Numerous numerical studies on its performance and applications have been conducted [3][4][5][6][7][8][9][10][11][12]. However, literature survey shows that little experimental study has been reported.In this article, FSS with gangbuster array is experimentally investigated. An FSS with Type-2 gangbuster array is fabricated and measured. The measured reflection and transmission coefficients agree well with numerical results.For comparison, an FSS with regular y-directed dipole array is also fabricated and measured. The band of FSS with gangbuster array is observed much wider. ANALYSIS OF FREQUENCY SELECTIVE SURFACESAnalysis of FSS is very crucial for both design and application engineers. Many approaches such as the periodic moment method [1, 2], the standard SDM [13], the equivalent circuit model [14], the finite element method [15], the finite difference time domain method [16], the recursive T-matrix method [17], etc., have been proposed. Commercial software such as Ansoft HFSS is also applicable.Among various methods for the analysis of FSS, the standard SDM is usually the method of choice. However, it is not imme- FABRICATIONAn FSS with Type-2 gangbuster array is fabricated. First, PCB technology is used to generate the array pattern as shown in Figure 1. Thin copper dipoles (width: 80 m, thickness: 17.5 m) are printed on Kapton substrate (relative permittivity:Ϸ3.5, thickness: 40 m). Dipole length (9.18 mm) is chosen so that the resonant frequency is approximately 10 GHz. A sandwich structure as shown in Figure 2 is then obtained by putting four Kevlar sheets (relative permittivity: Ϸ3.65 Ϫ j0.1, each sheet is 230 m thick) on both sides of the PCB. Finally, the sandwich structure is vacuum bagged and cured in autoclave for 1 h (7 bars, 175°C). The final panel (424 ϫ 424 ϫ 1.7 mm 3 , tolerance of thickness: Ϯ0.1 mm) with gangbuster array embedded is shown in Figure 3.For comparison, a panel with regular y-directed dipole array as shown in Figure 4 is also fabricated in the same way. EXPERIMENTAL SETUPThe experimental setup is shown in Figure 5. Figure 6 is a photo of the panel holder. Its height is 100 cm and the top surface is 60 ϫ 60 cm 2 . ...

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