Multibeam active phased arrays for communications satellites

Jacomb-Hood, A.; Lier, E.

doi:10.1109/6668.893245

Cited by 73 publications

(25 citation statements)

References 7 publications

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“…The radiated field of each element is represented by a method of cosine tapers [19], which gives closed-form expressions for the directivity of a planar array with arbitrary element locations and excitation identical patterns approximated by cosine functions, identical orientations and polarizations [2]. The elemental radiationĒ mn (r) of the mn th element located atr = (x mn , y mn , 0) is modelled by Equation (1)…”

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

“…The shape of the radiation pattern is controlled by indices (t 1 , t 2 ). These values are obtained by equating Equation (2) to the actual elements radiation pattern obtained from either experimental measurements or by numerical simulations [19].…”

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

“…The phased array antennas [1][2][3][4][5][6] are designed for high gain that can serve higher frequencies and improved phase progression technology. This technology enables sharp radiation patterns and steering antenna array beams toward a desired direction by using a phased array antenna.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

Section: Field Realization Of Single Antenna Elementmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Antennas play a vital role in communications and radar applications [1][2][3][4][5]. For particular an application, radiation pattern synthesis of an antenna is an important task.…”

Section: Introductionmentioning

confidence: 99%

Pattern Synthesis of Circular Antenna Array With Directional Element Employing Deterministic Space Tapering Technique

Ganesh¹,

Subhashini²

2017

PIER B

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Abstract-This paper proposes the concept of sparse appended with the space tapering technique for the synthesis of an antenna radiation pattern. The procedure experiments on a Circular Antenna Array (CAA) configuration comprising of directional element (1 + cos(ϕ)). The sparse initiates the minimum number of active elements in the CAA, while the space tapering technique gives the complex excitations that yield a beam pattern with constraints such as Side Lobe Level (SLL) and Beam Width (BW) in relation to Dolph-Chebyshev radiation pattern. The phase mode analysis, which is an built-in procedure in the proposed technique explores the circular antenna array configuration characteristics. The simulation results justify the effectiveness of the proposed technique for obtaining the desired radiation pattern synthesis.

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“…Another array was also developed at COMSAT Laboratories at C-band to produce eight simultaneous and independently shaped and steerable beams. Extensive development was performed in parallel at Lockheed Martin Commercial Satellite Systems and accomplished high level of integration in active phased arrays (Jacomb & Lier, 2000). The design uses modular concepts to increase the design flexibility and afford efficient in-orbit operation using MMIC components and high-efficiency SSPAs.…”

Section: Introductionmentioning

confidence: 99%