High-gain antenna using an intelligent artificial magnetic conductor ground plane

Park, I.Y.; Kim, D.

doi:10.1080/09205071.2013.817957

Cited by 16 publications

(8 citation statements)

References 11 publications

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“…However, for easier understanding of the proposed antenna, we summarize again how our antenna operates well even with remarkably reduce volume. The key idea for the significant volume reduction of the proposed MRA is originated from substituting a conventional directional feeding antenna with a new omni‐directional one located close to the reflectarray . One of the expected problems by lowering the height of the feeder antenna is gain and efficiency degradation due to reduced illumination efficiency.…”

Section: Antenna Designmentioning

confidence: 99%

“…Recently, our research group has proposed novel reflectarray antennas (RAs) with significantly reduced electrical volume, which was accomplished by substituting a conventional directional feeding antenna with a new omni‐directional one that is intentionally placed very close to a reflectarray ground plane . The first miniaturized reflectarray antenna (MRA) proposed in have achieved good aperture efficiency with high gain, even though it occupies electrically very small volume compared with that of the conventional RAs. In Kim et al, electrical volume of an MRA was far much reduced to 700 times smaller than the conventional RAs.…”

Section: Introductionmentioning

confidence: 99%

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Bandwidth enhancement of a miniaturized reflectarray antenna using sub‐wavelength meander‐line cells

Cho

Kim

2017

Micro & Optical Tech Letters

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We propose a new way to enlarge gain bandwidth of a miniaturized reflectarray antenna (MRA), a new type of reflectarray antenna (RA) with significantly reduced volume. To extend the gain bandwidth, we have used meander‐line based sub‐wavelength elements as reflectarray cells, which can fully cover a required reflection phase range ideally, 360°. As a result, we have accomplished a three times wider gain bandwidth than that of our previous MRAs. In addition, the proposed MRA can also provide high gain with good aperture efficiency even though a main beam directs toward a tilted direction. Furthermore, remarkably reduced electrical volume, which is 700 times smaller than the smallest conventional RAs, is still maintained. Measured aperture efficiency of the proposed MRA is 41.1% which is comparable with conventional RAs. And the measurement results show that the main lobe direction is very stable around the target direction within the given −1 dB gain bandwidth without any degradation in other performances. As a result, the proposed MRAs with wide gain bandwidth stands out as a good alternative of the conventional RAs.

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Section: Antenna Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bandwidth enhancement of a miniaturized reflectarray antenna using sub‐wavelength meander‐line cells

Cho

Kim

2017

Micro & Optical Tech Letters

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“…One of the major drawbacks of planar antenna is that it suffers from lower gain which reduces its application in practice. Various periodic structures such as meta‐material, AMC, and frequency selective surfaces (FSS) are used to increase the gain of single element single band planar antennas . Gain enhancement of a triple band linearly polarized (LP) antenna is discussed in Reference .…”

Section: Introductionmentioning

confidence: 99%

Dual‐band CPW fed MIMO antenna with polarization diversity and improved gain

Islam

Das²

2020

Int J RF Microw Comput Aided Eng

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A dual‐band MIMO slot antenna with polarization diversity and improved gain is proposed in this article. The antenna is composed of two C‐type back‐to‐back connected slot resonators and offers resonances at 3.5 and 5.2 GHz. This antenna element is further used to design a MIMO antenna. By introducing one U‐shaped slot between two antenna elements, isolation between the ports of this MIMO antenna is improved further. Finally, an artificial magnetic conductor (AMC) is placed below the MIMO antenna to enhance its gain. Gain enhancement of 1.5 and 2.2 dB is achieved at lower and upper band, respectively. S‐parameters, radiation patterns, gain, envelope correlation coefficient, and channel capacity loss are investigated to conclude about its performances in MIMO applications. Dual band dual polarization (circular and linear), improved isolation, polarization diversity (right‐hand circular polarization and left‐hand circular polarization), gain enhancement all are presented in a simple design represents the novelty of the proposed MIMO antenna.

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“…To solve the problem, our group proposed a novel technique to remarkably decrease the volume of reflectarray antennas . Although beam scanning was possible in our previous work, it is thoroughly restricted only on an H ‐plane, on which the feeding dipole antenna provides strong radiation innately.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a miniaturized reflectarray antenna radiating in unusually tilted directions

Cho

Kim

2018

Micro & Optical Tech Letters

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We investigate the overall performance of a miniaturized reflectarray antenna radiating in unusually inclined directions. In our previous work, we successfully reduced an overall electrical volume of a conventional reflectarray antenna by more than hundreds of times. In the previous work, beam scan directions were strictly limited on only one plane, i.e., an H‐plane which is a general beam scan plane for the used source half‐wavelength dipole antenna. However, for unrestricted beam control required to cover entire hemispherical radiation space, beam scanning on an E‐plane is also much required. Accordingly, we examine antenna gain and aperture efficiency for inclined radiation on an E‐plane, which is disadvantageous for the source dipole antenna. To minimize expected antenna gain decrease, each cell of the reflectarray is designed to present desired reflection phase which is required to provide constructive interference between direct and reflected waves coming from the dipole and the reflectarray, respectively. Consequently, even though the proposed antenna scans on an unusual E‐plane including a dipole axis, we can show our miniaturization method can still provide relatively high aperture efficiency, which is important to scan a main beam in any arbitrary directions collaborating on our previous work.

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High-gain antenna using an intelligent artificial magnetic conductor ground plane

Cited by 16 publications

References 11 publications

Bandwidth enhancement of a miniaturized reflectarray antenna using sub‐wavelength meander‐line cells

Bandwidth enhancement of a miniaturized reflectarray antenna using sub‐wavelength meander‐line cells

Dual‐band CPW fed MIMO antenna with polarization diversity and improved gain

Investigation of a miniaturized reflectarray antenna radiating in unusually tilted directions

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