Enabling Antenna Systems for Extreme Deep-Space Mission Applications

Schulze, R.; Wallis, R.E.; Stilwell, R.K.; Cheng, Wei

doi:10.1109/jproc.2007.905068

Cited by 20 publications

(9 citation statements)

References 11 publications

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“…INTRODUCTION AND MOTIVATION P HASED arrays supporting wide-angle electronic scanning play a key role in several applicative domains [1] (e.g., radar [2], remote sensing [3], and space communication systems [4]) that usually require antenna elements (e.g., waveguide apertures, slots, and horns [1], [5], [6]) able to radiate high powers. In such kinds of large antenna arrangements, nonnegligible variations in the reflection coefficient generally occur at the aperture-air interface when the array is scanned [6], [7] because of the variations in the inter-element coupling [6], [7].…”

Section: Synthesis Of Multilayer Waim Coatingsmentioning

confidence: 99%

“…Despite the very interesting results [8], [13], such an approach could be not so effective when facing multiple minima functionals [19], [20] because of the local nature of the optimization strategy. This could be the case of anisotropic multilayer WAIMs with multiband or wideband operations [1]- [4] and complicated constraints enforcing technological feasibility requirements (e.g., permittivity/permeability profiles, anisotropy behavior, WAIM thickness profiles, compositions, etc. ).…”

Section: Synthesis Of Multilayer Waim Coatingsmentioning

confidence: 99%

“…However, the computation of the generic (n, m)th Floquet series term is carried out in an approximate fashion by truncating the summation in (8) to the indexes P and Q (input parameters of the synthesis process) 4 :…”

Section: B Electromagnetic Modeling Blockmentioning

confidence: 99%

“…Previous examples have considered the design of singlefrequency (f min = f max = 15.25 [GHz], F = 1) W AIM structures; however, modern applications require increasing operative bandwidths to support different services with the same physical array [1], [4]. To assess the reliability of the SbD-based approach to address such a challenging issue, as well, the next numerical validation is concerned with the same WAIM structure of Fig.…”

Section: B Multifrequency Design (F > 1)mentioning

confidence: 99%

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Synthesis of Multilayer WAIM Coatings for Planar-Phased Arrays Within the System-by-Design Framework

Oliveri

Viani

Anselmi

et al. 2015

IEEE Trans. Antennas Propagat.

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The synthesis of multilayer wide-angle impedancematching (WAIM) structures for waveguide-fed planar phased array antennas is addressed. Under multifrequency constraints and assuming arbitrary array layouts, the synthesis problem is formulated within the system-by-design (SbD) framework. An iterative strategy is implemented by combining a fast EM modeling tool for the computation of the voltage reflection coefficient at the array surface and a solution-space sampling loop driven by the set of physical constraints describing both the synthesis objectives and the range boundaries for the degrees-of-freedom (DoFs) of the problem at hand. Thanks to the effectiveness and the reliability of such an integrated approach, it is possible to deal with multilayer multifrequency WAIM structures with uniaxially anisotropic permittivity and permeability tensors. Selected numerical results are presented to assess the potentialities and the reliability of the proposed approach also in comparison with state-of-the-art techniques.Index Terms-Metamaterials, particle-swarm (PS) optimizer, phased arrays, system-by-design (SbD), wide-angle impedance matching (WAIM).Giacomo Oliveri (M'07-SM'13) received the B.S. and M.S. degrees in telecommunications engineering and the Ph.D. degree in space sciences and engineering from the

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Section: Synthesis Of Multilayer Waim Coatingsmentioning

confidence: 99%

Section: Synthesis Of Multilayer Waim Coatingsmentioning

confidence: 99%

Section: B Electromagnetic Modeling Blockmentioning

confidence: 99%

Section: B Multifrequency Design (F > 1)mentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of Multilayer WAIM Coatings for Planar-Phased Arrays Within the System-by-Design Framework

Oliveri

Viani

Anselmi

et al. 2015

IEEE Trans. Antennas Propagat.

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“…We hope our work could help improve this situation and re-inspire the interest in CP antennas for mobile communications. Omnidirectional CP antennas may also find applications in television broadcasts, mobile satellites, and space vehicles such as airplanes, missiles, rockets, and spacecraft [5]- [10]. For modern mobile communications, base station antennas must have a wide bandwidth.…”

Section: Introductionmentioning

confidence: 99%

A novel broadband omni-directional circularly polarized antenna for mobile communications

Quan

Tentzeris

2011

2011 IEEE International Symposium on Antennas and Propagation (APSURSI)

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Abstract-A broadband circularly polarized (CP) antenna is developed with an omnidirectional radiation pattern in the horizontal plane. Four broadband CP rectangular loop elements are employed for broadband omnidirectional CP radiation. The four rectangular loop elements are first printed on a flexible thin dielectric substrate and then rolled into a hollow cylinder. A conducting cylinder is introduced inside the hollow cylinder for achieving desired omnidirectional CP performance. A feeding network consisting of four broadband baluns and an impedance matching circuit is designed to feed the four rectangular loop elements. The omnidirectional CP antenna has a circular cross section with diameter of . Experimental results show that the omnidirectional CP antenna has bandwidths of 41% (1.65-2.5 GHz) for axial ratio dB and 45% (1.58-2.5 GHz) for return loss dB. The gain variation in the omnidirectional plane is less than 1 dB for the frequency range from 1.65 to 2.5 GHz. Good agreement is obtained between simulated and measured results.Index Terms-Broadband antenna, circularly polarized (CP) antenna, mobile communications, omnidirectional antenna.

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Design of a tunable omnidirectional circularly polarized antenna based on VO ₂

Zhang

Liu

Zeng

et al. 2019

Int J RF Microw Comput Aided Eng

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In this article, a VO 2 -based tunable omnidirectional circularly polarized (CP) antenna is designed. The proposed antenna combines copper and metamaterial VO 2 . By utilizing the characteristics of insulator-metal phase transition of VO 2 , we can change the length of the resonant branches to achieve tunable working bandwidth. The proposed antenna is composed of a modified floor loaded with VO 2 and copper resonant branches, a top patch with slits, and 14 shorting vias connecting the top path and bottom floor. Different from the traditional electric controlled antennas, antennas based on metamaterial VO 2 do not need to design complicated circuit structures and can be easily tailored by the external temperature (T). The simulated results illustrate that when T ≥ 68 C (state I), the proposed antenna has a 10-dB impedance bandwidth of 15.9% (2.09-2.45 GHz), and a 3-dB axial ratio (AR) bandwidth of 23.4% (2.04-2.58 GHz). When T < 68 C (state II), it has a bandwidth of 6.5% (2.38-2.54 GHz) with S 11 below −10 dB, and a bandwidth of 19.9% (2.39-2.92 GHz) with AR below 3 dB. K E Y W O R D S omnidirectional circular polarization, phase transition, tunable antenna, VO 2

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Enabling Antenna Systems for Extreme Deep-Space Mission Applications

Cited by 20 publications

References 11 publications

Synthesis of Multilayer WAIM Coatings for Planar-Phased Arrays Within the System-by-Design Framework

Synthesis of Multilayer WAIM Coatings for Planar-Phased Arrays Within the System-by-Design Framework

A novel broadband omni-directional circularly polarized antenna for mobile communications

Design of a tunable omnidirectional circularly polarized antenna based on VO ₂

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Enabling Antenna Systems for Extreme Deep-Space Mission Applications

Cited by 20 publications

References 11 publications

Synthesis of Multilayer WAIM Coatings for Planar-Phased Arrays Within the System-by-Design Framework

Synthesis of Multilayer WAIM Coatings for Planar-Phased Arrays Within the System-by-Design Framework

A novel broadband omni-directional circularly polarized antenna for mobile communications

Design of a tunable omnidirectional circularly polarized antenna based on VO 2

Contact Info

Product

Resources

About

Design of a tunable omnidirectional circularly polarized antenna based on VO ₂