Low-profile Ku-band array antenna for broadband mobile satellite communications

Tiezzi, F.; Vaccaro, S.; Rio, Daniel Llorens del; Oro, C.D.G. de; Rua, Manuel Fajardo

doi:10.1109/aero.2011.5747325

Cited by 6 publications

(8 citation statements)

References 2 publications

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“…In a completely demagnetized state ( ), the material is characterized by a scalar relative permeability . Under the assumption of cylindrical domains, Schlömann [28] derived the expression in (1), which was later found to be in good agreement with experimental data (1) When the material is magnetized ( ), the permeability has the form of a gyrotropic tensor similar to Polder's tensor. The tensor permeability for a -biased partially magnetized ferrite is given in (2), diagonal elements are usually expressed using the empirical equations of Green and Sandy [29] given by (3) and (4) as follows:…”

Section: A Ferrites In Partially Magnetized Statementioning

confidence: 71%

“…Section II introduces the theory and phase-shifting properties of symmetrically and 1 Demagnetization effects refer to the reduction of the external magnetic field applied to a ferrite material resulting in establishing an internal magnetic field within the material whose value is lower than the applied field. It is governed by , where is called the demagnetization factor [17] anti-symmetrically biased waveguides in partially magnetized state.…”

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confidence: 99%

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An Integrable SIW Phase Shifter in a Partially Magnetized Ferrite LTCC Package

Nafe

Shamim

2015

IEEE Trans. Microwave Theory Techn.

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There is a growing need for small size integrable phased antenna arrays for emerging satellite communications on-the-move applications. Traditional ferrite-based phase shifters are generally bulky due to the need of electromagnets for biasing, yielding them unsuitable for this kind of application. In this paper, a novel compact light-weight substrate integrated waveguide (SIW) based phase shifter realized in a multi-layer ferrite low-temperature co-fired ceramic package with embedded bias windings is reported. By using embedded windings and operating the material in a partially magnetized state, the required bias magnetic field could be significantly reduced from typically about 1000 Oe to less than 50 Oe. Moreover, the presented phase shifter has two modes of operations corresponding to two different biasing scenarios of the SIW, namely, symmetric and anti-symmetric bias. Under anti-symmetric bias, the phase shifter can achieve high nonreciprocal phase shift, whereas under symmetric bias, the phase shift is reciprocal, but the available phase shift is less than the anti-symmetric case. The fabricated prototype operates in the 11.5-13.5-GHz range and has a peak figure of merit (phase shift per decibel of loss) of 102 dB and a maximum phase shift per unit length of 153 cm, which are more than five times the previously reported figures for this technology. Due to the use of embedded windings, the presented phase shifter offers a huge size reduction from the order of cm to mm , making it particularly useful for mobile phased-array applications.Index Terms-Ferrite phase shifter, low-temperature co-fired ceramic (LTCC), substrate integrated waveguide (SIW).

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Section: A Ferrites In Partially Magnetized Statementioning

confidence: 71%

mentioning

confidence: 99%

An Integrable SIW Phase Shifter in a Partially Magnetized Ferrite LTCC Package

Nafe

Shamim

2015

IEEE Trans. Microwave Theory Techn.

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“…• JAST company (Switzerland) designed a phased array antenna with combined scanning HiSat-30TR [19]. Antenna consists of two separate apertures for each subband ( Fig.9.b).…”

Section: B Antenna Arraysmentioning

confidence: 99%

Antennas for Satcom-on-the-Move, Review

Borisov¹,

Shishlov

2014

2014 International Conference on Engineering and Telecommunication

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“…For instance, to improve the system capacity of basestations antennas, a down-tilt of the radiation towards the ground was employed to increase the signal reception from the mobile device [1], [2]. In satellite communications, tilting the embedded pattern of the individual elements of an antenna array was implemented to achieve a gain enhancement for large scan angles within a limited azimuth region [3], [4]. The entire field of view was then covered by mechanical rotation of the array along its axis.…”

Section: Introductionmentioning

confidence: 99%

A Linear Array of Skewed Dipoles With Asymmetric Radiation Pattern for Angular Filtering

Yepes

Gandini²,

Monni³

et al. 2020

Antennas Wirel. Propag. Lett.

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We present a design of a linear array of tilted dipoles to achieve radiation patterns with asymmetric angular filtering characteristics. To realize the asymmetric radiation, the dipole elements are spaced by a distance larger than half a wavelength, thus allowing for grating lobes to occur in the visible region. Moreover, the dipoles are loaded with artificial dielectrics to increase the front-to-back ratio and consequently to enable higher gain in certain desired angular regions. Based on the design, a linear array with 10 elements is manufactured and tested. The measured results show the ability of such an array to achieve stable gain from broadside up to 90 degrees scanning, while implementing a stop-band angular filter for negative scanning angles.

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Low-profile Ku-band array antenna for broadband mobile satellite communications

Cited by 6 publications

References 2 publications

An Integrable SIW Phase Shifter in a Partially Magnetized Ferrite LTCC Package

An Integrable SIW Phase Shifter in a Partially Magnetized Ferrite LTCC Package

Antennas for Satcom-on-the-Move, Review

A Linear Array of Skewed Dipoles With Asymmetric Radiation Pattern for Angular Filtering

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