An on-board integrated beam conditioning system for active phased array satellite antennas

Lier, E.; Purdy, D.S.; Ashe, Jeffrey; Kautz, G.M.

doi:10.1109/past.2000.859008

Cited by 11 publications

(13 citation statements)

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“…Finally, (19) can be used (with the updated distances computed using ( 21)-( 24)) to compute the array weights for an N-dimensional array on a cylindrical surface with radius r. As with the wedge-shaped surface, the expressions to compute the array weights have been written in a general manner that includes element spacing and the radius of the cylinder. This makes the technique presented here useful for an array attached to a changing cylindrical surface.…”

Section: Computing the Array Weights For N Elementsmentioning

confidence: 99%

“…It has been shown that the overall gain of an antenna array can be reduced by as much as 25 dBi in a particular direction without appropriate phase and amplitude compensation [16]. To mitigate some of the unwanted effects of deformation on the overall gain of the array, several compensation techniques have been proposed [17][18][19][20][21][22][23][24][25][26]. The aforementioned literature Sensors 2022, 22, 6616 2 of 18 study shows that the main focus is on the broadside radiation pattern correction of a conformal antenna array attached to a changing surface (i.e., vibrating surface) using composite amplitude and phase errors measurements, mechanical calibration methods, hardware sensor monitoring and the null points adjusting method.…”

Section: Introductionmentioning

confidence: 99%

“…Sensors 2022, 22, x FOR PEER REVIEW 2 o compensation techniques have been proposed [17][18][19][20][21][22][23][24][25][26]. The aforementioned literat study shows that the main focus is on the broadside radiation pattern correction of a c formal antenna array attached to a changing surface (i.e., vibrating surface) using com site amplitude and phase errors measurements, mechanical calibration methods, ha ware sensor monitoring and the null points adjusting method.…”

Section: Introductionmentioning

confidence: 99%

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Beamforming with 1 × N Conformal Arrays

Ullah

Braaten

Iftikhar

et al. 2022

Sensors

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The rapid growth of wireless spectrum access through cellular and IoT devices, for example, requires antennas with more capabilities such as being conformal and self-adapting beamforming. In this paper, the adaptive beamforming patterns of microstrip patch antenna arrays on changing flexible (or conformal) curved surfaces are developed by deriving array coefficients based on the projection method that includes the mutual coupling between elements. A linear four-element microstrip patch antenna array is then embedded on two deformed conformal surfaces to investigate the projection method for desired beamforming patterns. The generated beamforming radiation patterns using the computed weighting coefficients are validated with theoretical equations evaluated in MATLAB, full-wave simulations in HFSS and measurement results. The measured results of the fabricated system agree with the simulated results. Furthermore, new guidelines are provided on the effects of mutual coupling and changing conformal surfaces for various beam-forming patterns. Such demonstrations pave the way to an efficient and robust conformal phased-array antenna with multiple beam forming and adaptive nulling capabilities.

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Section: Computing the Array Weights For N Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Beamforming with 1 × N Conformal Arrays

Ullah

Braaten

Iftikhar

et al. 2022

Sensors

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“…A fast and accurate calibration scheme was reported in [5][6][7][8]. This orthogonal encoding and decoding approach, based on the Hadamard coding scheme, was applied to the array presented in this paper [9].…”

Section: Array Antenna Calibration and Controlmentioning

confidence: 99%

A Modular and Lightweight Multibeam Active Phased Receiving Array for Satellite Applications: Design and Ground Testing

Lier

Melcher

2009

IEEE Antennas Propag. Mag.

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A 17 GHz receiving multibeam active phased array, based on modular "supertiles," was built and tested. The array was launched and placed in geostationary orbit in 2008. The tile concept is characterized by low volume and low mass, making it well suited for satellite-antenna applications, and in particular for deployed multibeam active phased arrays for communications satellites. The modular design facilitates low recurring cost in a high-volume continuous production. Both component and array measurement data are presented in the paper. Measured array-antenna patterns were in good agreement with estimated and predicted values, proving that the array can be built according to its requirements, and calibrated and controlled to generate independent beams with low sidelobes from low-rms excitation errors.

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“…Conformal antenna arrays are used extensively in a wide variety of applications such as antennas on an aircraft [1], satellite arrays [2] and wearable networks [3]- [4]. One of the main advantages of a conformal antenna is the ability to place them on curved surfaces.…”

Section: Introductionmentioning

confidence: 99%

Gain limits of phase compensated conformal antenna arrays on non-conducting spherical surfaces using the projection method

Ijaz

Sanyal

Mendoza-Radal

et al. 2013

IEEE International Conference on Wireless for Space and Extreme Environments

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Previously, it has been shown that the projection method can be used as an effective tool to compute the appropriate phase compensation of a conformal antenna array on a spherical surface. In this paper, the projection method is used to study the gain limitations of a phase-compensated sixelement conformal microstrip antenna array on non-conducting spherical surfaces. As a metric for comparison, the computed gain of the phase-compensated conformal array is compared to the gain of a six-element reference antenna on a flat surface with the same inter-element spacing and operating frequency. To validate these computations, a conformal phased-array antenna consisting of six individual microstrip patches, voltage controlled phase shifters and a power divider was assembled and tested at 2.22 GHz. Overall, it is shown how much less the gain of the phase-compensated antenna is than the reference antenna for various radius values of the sphere.

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An on-board integrated beam conditioning system for active phased array satellite antennas

Cited by 11 publications

References 0 publications

Beamforming with 1 × N Conformal Arrays

Beamforming with 1 × N Conformal Arrays

A Modular and Lightweight Multibeam Active Phased Receiving Array for Satellite Applications: Design and Ground Testing

Gain limits of phase compensated conformal antenna arrays on non-conducting spherical surfaces using the projection method

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