MIMO 2&amp;#x00D7;2 reference antennas concept

Szini, I.; Pedersen, Gert Frølund; Scannavini, A.; Foged, L. J.

doi:10.1109/eucap.2012.6206567

Cited by 14 publications

(17 citation statements)

References 1 publication

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“…The proposed MIMO reference antenna can also be designed for the reference antennas with "good", "normal" or "bad" MIMO performance, as defined in [7]. The detailed configurations of the designed antenna are shown in Fig.…”

Section: Mimo Reference Antenna For the Investigation Of Mimo Performmentioning

confidence: 99%

“…Compared with the previous work in [7] the proposed MIMO reference antenna has the following advantage:…”

Section: Introductionmentioning

confidence: 99%

“…A kind of MIMO reference antenna has been proposed in [5][6][7]. It consists of two inverted-F antennas (IFA) on two corners of a ground plane.…”

Section: Introductionmentioning

confidence: 99%

“…For each band, the MIMO reference antenna systems have been defined as "good" (with low correlation and high efficiency), "nominal" (with moderate correlation and moderate efficiency), and "bad" (with poor correlation and low efficiency). If the reference antennas require different ECCs with small variation of total efficiencies, the design in [5][6][7] is difficult to achieve it.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the proposed antenna is also re-designed for the similar properties as that in [7] for the "good" and "normal" situations. In the "bad" case, with a total efficiency of 47%, the ECC of the designed antenna is around 0.98, which is much higher than the 0.84 in [7]. Finally, some key parameters for antenna designs are also provided.…”

Section: Introductionmentioning

confidence: 99%

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Mimo Reference Antennas With Controllable Correlations and Total Efficiencies

Zhang¹,

Zhao

Zhu

et al. 2014

PIER

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Abstract-MIMO reference antennas are proposed for over the air (OTA) measurement applications. The reference antennas could get rid of feeding cable interference and control envelope correlation coefficients (ECC) continuously by only changing the length of an etched slot on a dual-feed PIFA. If only the ECC is investigated, the MIMO reference antenna is optimized to have a small variation of total efficiency from 70% to 50% when the ECC increases from 0.1 to 0.88. The prototypes are fabricated and measured in a scattered field chamber (SFC). Measurements agree well with the simulations. If the MIMO performance is studied, the MIMO reference antenna is proposed to own a large variation of total efficiencies from 90% to 47% while the ECC increases from 0 to 0.98. The bandwidth of the proposed reference antennas depend on the size of the antennas. This method is valid for all the frequencies.

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Section: Mimo Reference Antenna For the Investigation Of Mimo Performmentioning

confidence: 99%

“…Compared with the previous work in [7] the proposed MIMO reference antenna has the following advantage:…”

Section: Introductionmentioning

confidence: 99%

“…A kind of MIMO reference antenna has been proposed in [5][6][7]. It consists of two inverted-F antennas (IFA) on two corners of a ground plane.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mimo Reference Antennas With Controllable Correlations and Total Efficiencies

Zhang¹,

Zhao

Zhu

et al. 2014

PIER

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Study of ferroelectric/dielectric multilayers for tunable stub resonator applications at microwaves

et al. 2014

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Tunable coplanar waveguide stub resonators deposited on various ferroelectric/dielectric heterostructures are studied in the 10-GHz band. A frequency tunability up to 45% is achieved under a moderate biasing field (E bias < 100 kV/cm) when the resonator is printed on KTa 0.5 Nb 0.5 O 3 (KTN) ferroelectric thin film alone: this comes from the large permittivity agility of the KTN material ( r(KTN) varies from 700 to 200). Nevertheless this also leads to significant insertion loss due to the dielectric loss of the ferroelectric material itself (tan r(KTN) ≈ 0.15-0.30 at 10 GHz). In this paper, an original route has been considered to reduce the device loss while keeping up a high frequency tunability. It consists in associating the KTN film with a dielectric film to elaborate ferroelectric/dielectric multilayers. The * Corresponding author. Tel.: +33 2 96 60 96 53; fax: +33 2 96 60 96 52. E-mail address: xavier.castel@univ-rennes1.fr (X. Castel).2 Bi 1.5 Zn 0.9 Nb 1.5 O 7- (BZN) oxide material is selected here for two main reasons, namely its low dielectric loss (tan r(BZN) ≈ 0.005-0.0075) and its moderate relative permittivity ( r(BZN) ≈ 95-125) at 12.5 GHz. The relevance of this approach is studied numerically and experimentally.We compare numerically two different heterostructures for which the ferroelectric film is grown on the dielectric film (KTN/BZN), or vice versa (BZN/KTN). A stub resonator printed on the most relevant heterostructure has been fabricated, and experimental data are discussed and compared to the numerical results.

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