Compact 2 $\times$ 2 Coupled Double Loop GPS Antenna Array Loaded With Broadside Coupled Split Ring Resonators

Gheethan, Ahmad A.; Herzig, P.; Mumcu, Gökhan

doi:10.1109/tap.2013.2253539

Cited by 41 publications

(26 citation statements)

References 27 publications

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“…Moreover, the maximum total efficiency is achieved at f c with a value of −0.5 dB, and also keeps above −1 dB within a range of 20 MHz, being the array more than adequate for the GPS signal bandwidth requirements. It is important to remark that the total efficiency achieved by this AA example is higher than many recently proposed compact designs . The main reason is that these array designs are intended to reduce reflected power at the expense of creating a lossy structure by, for example, employing high dielectric permittivity, fences, resonant structures, or decoupling and matching networks, which actually creates an inefficient array system.…”

Section: Efficient Compact Microstrip Aamentioning

confidence: 96%

“…It is important to remark that the total efficiency achieved by this AA example is higher than many recently proposed compact designs. 4,5,17,18,23,24 The main reason is that these array designs are intended to reduce reflected power at the expense of creating a lossy structure by, for example, employing high dielectric permittivity, fences, resonant structures, or decoupling and matching networks, which actually creates an inefficient array system. However, as we have previously described, it is not necessary to make use of these elements if our approach is adopted.…”

Section: Array Responsementioning

confidence: 99%

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Orthonormal method for compact Global Navigation Satellite Systems antenna array designs

Marranghelli

Valle

Roncagliolo

2019

Int J RF Microw Comput Aided Eng

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Compact antenna arrays require special considerations at design time not to degrade its efficiency and also the spatial diversity becomes reduced in terms of phase resolution as distance diminishes. Additionally, element radiation patterns are affected and the objective of equally behaved antennas is even more difficult to achieve. However, the induced antenna gain differences can actually be helpful because they can be used to maintain the degrees of freedom in array radiation pattern subspace. In this article, a general analysis on the relationship of efficiency and beam patterns are reviewed to prove that maximum efficiency is achieved when radiation patterns fulfill a given orthogonality condition. Under this condition, we propose to apply a unitary matrix transformation to the array response that can translate the compact antenna array behavior into the equivalent response of a λ2‐spaced ideal antenna array without modifying its total efficiency. Consequently, an useful compact antenna array should be designed to have orthogonal radiation beams. Then, applying the transformation, they can be translated to another orthogonal radiation patterns set with only phase differences and a common gain pattern. Simulated results of a computer‐aided design of a practical array of Global Navigation Satellite Systems microstrip antennas are presented.

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Section: Efficient Compact Microstrip Aamentioning

confidence: 96%

Section: Array Responsementioning

confidence: 99%

Orthonormal method for compact Global Navigation Satellite Systems antenna array designs

Marranghelli

Valle

Roncagliolo

2019

Int J RF Microw Comput Aided Eng

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“…Nevertheless, the decoupling methods mentioned earlier are restricted to linearly polarized antenna arrays. In a more recent work, the broadside coupled SRRs (BC‐SRR) have been located and oriented strategically in order to reduce mutual coupling between circularly polarized (CP) elements within a compact global positioning system (GPS) patch antenna array . This technique offers a coupling suppression of 10 dB; however, its obvious drawbacks involve a larger number of expensive SRRs, relatively higher profile, and challenging assembly process.…”

Section: Introductionmentioning

confidence: 99%

Isolation enhanced circularly polarized patch antenna array using modified electric‐field‐coupled resonator

Shi

Feng

et al. 2018

Int J RF Microw Comput Aided Eng

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A modified electric‐field‐coupled (MELC) resonator featuring negative permittivity is proposed to enhance the inter‐element isolation of a circularly polarized (CP) patch antenna array operated at Chinese compass navigation satellite system (CNSS) downlink band. The resonator comprises two capacitive gaps and a common inductive strip connected to the ground plane by two metal vias. A suspended microstrip line excitation is employed to efficiently design and investigate the MELC resonator whose constitutive parameters are subsequently extracted. A dual‐element CNSS antenna array has been prototyped and measured. The experimental results demonstrate that under the assistance of the proposed MELC resonator, a mutual coupling reduction of 15 dB has been achieved while maintaining good impedance matching and CP radiation performance. Details of the design considerations along with simulation and measurement results are presented and discussed.

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“…Various efforts to solve this problem are found in literature, e.g. by means of adding a decoupling and matching network [10], [11] able to decouple the coupled patterns of the antennas, or by using, for instance, split ring resonators (SRRs) to stop the coupling between the elements [12]. These techniques are, however, manufacturingintensive and considerably increase the cost of the system.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized E5a/E1 Antenna Array for Robust GNSS Navigation

Caizzone

2017

Antennas Wirel. Propag. Lett.

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This paper discusses the design and manufacturing of a miniaturized 2x2 stacked patch antenna array, operating at E5a and E1 Galileo bands (i.e. respectively at central frequencies of 1176 and 1575 MHz), for robust navigation applications. The 2x2 array configuration has a total dimension of 100 mm x 100 mm, hence enabling its use in mobile applications. Due to the tight placement of nearby elements, mutual coupling problems arise. The reduction of the electromagnetic interaction among the elements is pursued by means of a metallic fence.

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Compact 2 $\times$ 2 Coupled Double Loop GPS Antenna Array Loaded With Broadside Coupled Split Ring Resonators

Cited by 41 publications

References 27 publications

Orthonormal method for compact Global Navigation Satellite Systems antenna array designs

Orthonormal method for compact Global Navigation Satellite Systems antenna array designs

Isolation enhanced circularly polarized patch antenna array using modified electric‐field‐coupled resonator

Miniaturized E5a/E1 Antenna Array for Robust GNSS Navigation

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