Leaky Wave Enhanced Feeds for Multibeam Reflectors to be Used for Telecom Satellite Based Links

Neto, A.; Ettorre, Mauro; Gerini, G.; Maagt, P. de

doi:10.1109/tap.2011.2167909

Cited by 25 publications

(11 citation statements)

References 17 publications

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“…In Equation (1), G(θ mn , φ mn ) is the individual elemental radiation function, which is modeled by cosine tapers [12].Ḡ…”

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

“…To address this problem, a skirt element theory is appended in order to keep intact the efficiency and beam overlap, which is the main objective of the proposed method. Literature suggests that the most successful applications are in the satellite DTV (Direct Television) receptions, where the reflector antennas are widely employed to realize the concepts using multiple offset feeds [12][13][14][15][16][17]. In this case, the radiations of reflector antennas, when it is illuminated by each feed, are highly directive with their main beams pointing to different satellites.…”

Section: Introductionmentioning

confidence: 99%

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Design Approach of Multibeam Using Phased Array Antenna Aided With Butler Matrix for a Fixed Coverage Area

Vani¹,

Subhashini²

2018

PIER B

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Abstract-This paper devises a framework of phased array antennas to radiate multiple beams for a fixed coverage. The phased antenna array is chosen so that the beamforming can be fixed in selected coverage area. The antenna arrays are employed with a Butler matrix (BM) to form required phases of excitation coefficients to the radiating elements. Optimally designed 4 × 4 or 8 × 8 Butler matrix is utilized at the I/O ports of the phased antenna array. The grating lobes are reduced by using the principle of orthogonality to the feeds of subarray (group of column arrays of phased array). This article also exploits the concept of skirt elements to reach the desired coverage area while reducing the beam overlapping in the restricted area. Simulation studies highlight the proposed claims with elaborated numerical analysis of different case studies.

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“…In Equation (1), G(θ mn , φ mn ) is the individual elemental radiation function, which is modeled by cosine tapers [12].Ḡ…”

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design Approach of Multibeam Using Phased Array Antenna Aided With Butler Matrix for a Fixed Coverage Area

Vani¹,

Subhashini²

2018

PIER B

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“…Note that the optimization has been performed in E-plane (φ 0 = 90 • ) of the LWA. This plane is the most critical one for superstrate configurations due to the presence of a leaky-wave mode radiating close to endfire [2]- [13], [15]. On the other hand, the azimuthal symmetry of the configuration will assure good radiation performance in all field cuts once the E-plane fulfills the imposed requirements on the radiation pattern [11], [13].…”

Section: Flat-topped Radiating Structurementioning

confidence: 99%

Optimization Procedure for Planar Leaky-Wave Antennas With Flat-Topped Radiation Patterns

Scattone

Ettorre

Sauleau

et al. 2015

IEEE Trans. Antennas Propagat.

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International audienceWe describe here an optimization procedure to shape the radiation pattern of planar two-dimensional (2-D) leaky-wave antennas. The structures under investigation are superstrate configurations made by partially reflecting screens (impedances sheets) over a ground plane and excited by open-ended waveguides. The antenna configuration providing the required radiation pattern is obtained by resorting to an ad hoc optimization procedure that minimizes the mean squared error between the target pattern and the actual radiated far field. The radiated field is analytically evaluated using a Green's function spectral approach to speed up the optimization process. Several kinds of radiation patterns can be obtained using the proposed algorithm. In this work, we focus our attention on flat-topped radiation patterns, suitable as element pattern for phased array antennas covering a limited angular field of view such as those considered for space applications. The proposed procedure is validated by full-wave results and measurements

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“…Thus, this microstrip TWA design has advantages of simple design schematic, low profile, and easy impedance matching. TWAs have been studied as solutions for gain enhancement of simple radiating sources, side‐lobe level reduction, and radiation pattern reconfiguration . By designing a TWA for RADAR systems in Reference , an effective continuous scanning has been achieved with a small increase in the feeding signal's frequency, thus it is possible to optimize the range and propagation pattern of the radar array, and steer the pattern of antenna for a scanning in time.…”

Section: Introductionmentioning

confidence: 99%

Microstrip tapered traveling wave antenna for wide range of beam scanning in X‐ and Ku‐bands

Güneş

Belen

2019

Int J RF Microw Comput Aided Eng

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In this work, a broadband traveling wave antenna (TWA) is presented as a microstrip design that is capable of a wide range of beam scanning by changing the operation frequency within 8 to 14 GHz. For this purpose, a rhombus shaped microstrip patch is used as a unit element and TWA is built as a tapered microstrip line consisting of the cascaded rhombus shaped unit elements and terminated by a rectangular antenna instead of traditional resistive termination which can be called patch loaded traveling wave antenna (PLTWA). Optimization and simulation of the PLTWA is carried out using 3‐D Microwave simulation software CST and its dimensions are resulted as 130 × 30 mm. From the simulations, it should be noted that the patch termination increases the maximum gain almost 3 dB and the total efficiency up to 90% compared to the traditional resistive load over the operation band at the expanse of a small distortion on S11 characteristics. Then the PLTWA is fabricated and measured along its operation band 8 to 14 GHz and it exhibits a peak gain of 9.5 dBi at 11 GHz. The measured gain of the proposed antenna is found between 9 dB and 12 dB and its beam direction is steerable with the range of 80° (−65°‐15°) over the operation band 8 to 14°GHz.

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Leaky Wave Enhanced Feeds for Multibeam Reflectors to be Used for Telecom Satellite Based Links

Abstract: International audienc

Cited by 25 publications

References 17 publications

Design Approach of Multibeam Using Phased Array Antenna Aided With Butler Matrix for a Fixed Coverage Area

Design Approach of Multibeam Using Phased Array Antenna Aided With Butler Matrix for a Fixed Coverage Area

Optimization Procedure for Planar Leaky-Wave Antennas With Flat-Topped Radiation Patterns

Microstrip tapered traveling wave antenna for wide range of beam scanning in X‐ and Ku‐bands

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