A shaped reflector antenna for mobile communications

Bergmann, J.R.; Hasselmann, F.J.V.; Branco, M.G. Castello

doi:10.1109/aps.1999.788388

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…The shape of the reflector antenna surface can be specified by combining both vertical and transverse curves. The conventional method for designing the shape of the reflector to produce a cosecant-squared pattern in the vertical plane is GO and is described in details by many authors [4][5][6][7][8][9]. Also a brief shaping procedure based on the GO is explained in the previous work [23].…”

Section: Fundamentals Of the Antenna Designmentioning

confidence: 99%

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Cosecant‐squared pattern synthesis method for broadband‐shaped reflector antennas

Dastranj

Abiri

Mallahzadeh

2014

IET Microwaves, Antennas & Propagation

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A new technique based on the invasive weed optimisation (IWO) algorithm and geometrical optics (GO) method for synthesising broadband cosecant‐squared pattern reflector antennas is presented. The main feature that distinguishes this technique from others is the wide bandwidth. Moreover, compared with the previous methods, the proposed method allows to obtain extremely smaller ripples in the shaped region and lower sidelobe level (SLL). To achieve the desired performance over the entire 18–40 GHz operational bandwidth, the reflector surface is synthesised using a complex and accurate frequency‐dependent fitness function including optimum weighting values. The simulation results via FEKO software package further prove the validity and versatility of this technique for solving reflector synthesis problems. In addition, experimental investigations are conducted to understand the complete reflector antenna system behaviours. Measurements show a good agreement with the simulation results. At last, the efficiency of the proposed frequency‐dependent IWO (FDIWO) method both in bandwidth and optimality of the results are compared with original IWO method, common GO method and electromagnetic radiation (TICRA) software package. Comparison results show that the FDIWO method outperforms the other techniques.

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Section: Fundamentals Of the Antenna Designmentioning

confidence: 99%

“…Many techniques have been devised to obtain cosecant-squared radiation pattern in reflector antennas. Most of these methods are based on the principles of GO [4][5][6][7][8][9]. Several modifications of the GO-shaping methods have been proposed in the literature [10].…”

Section: Introductionmentioning

confidence: 99%

Cosecant‐squared pattern synthesis method for broadband‐shaped reflector antennas

Dastranj

Abiri

Mallahzadeh

2014

IET Microwaves, Antennas & Propagation

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show abstract

“…Many techniques have been devised to synthesize the shaped beam reflector antennas. Most of these methods are based on the principles of geometrical optics (GO) . Several modifications of the GO‐shaping methods have been proposed in the literature .…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional synthesis and optimization of a broadband shaped beam reflector antenna using IWO and PSO algorithms

Dastranj

Abiri

Mallahzadeh

2014

Int J RF and Microwave Comp Aid Eng

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A new technique for broadband shaped beam reflector antennas synthesis is presented. The surface of the shaped reflector is represented by a set of orthogonal Jacobi-Fourier expansion functions. To achieve a cosecant squared pattern in the elevation plane and a pencil beam in the azimuth plane, the expansion coefficients are optimized using invasive weed optimization and particle swarm optimization algorithms. High accuracy is achieved by combining optimization tools and analysis methods such as physical optics and integral equation. Besides, in the optimization procedures, a complex object function is used to achieve the desired performance over the entire 26-40 GHz operating bandwidth. The simulation results via FEKO and CST Microwave Studio software packages prove the validity and versatility of this technique for solving shaped reflector synthesis problems. There are several features that distinguish this technique from the previous methods. First of all is the wide bandwidth. The second is its ability to shape the radiation patterns in the elevation and azimuth planes simultaneously (two-dimensional synthesis). Moreover, compared with other techniques, the proposed method allows achieving extra desired features such as high directivity, low sidelobe levels, and small ripples in the shaped beam region.

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On the design of reflector antennas for cosecant squared power pattern

Bergmann

Hasselmann

IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Dige

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A shaped reflector antenna for mobile communications

Cited by 5 publications

References 3 publications

Cosecant‐squared pattern synthesis method for broadband‐shaped reflector antennas

Cosecant‐squared pattern synthesis method for broadband‐shaped reflector antennas

Two-dimensional synthesis and optimization of a broadband shaped beam reflector antenna using IWO and PSO algorithms

On the design of reflector antennas for cosecant squared power pattern

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