A shared‐aperture S/X dual broadband microstrip antenna with one perforated patch

Kim, Jae Hyun; Hong, Sun K.; Kim, Boo-Gyoun

doi:10.1002/mop.32056

Cited by 11 publications

(7 citation statements)

References 11 publications

(28 reference statements)

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“…For the antenna design in Figure 1, the multiplexing efficiency metric is shown in Figure 17a, which indicates that the proposed design is mainly limited by the overall efficiencies of the elements. Table 4 shows the performance of the proposed antenna compared with other published stacked patch antennas [36,[46][47][48][49][50][51][52][53][54][55][56]. As can be observed, our work has attained a wider impedance bandwidth compared to others, except [56].…”

Section: Diversity Gain Correlation and Multiplexing Efficiencymentioning

confidence: 78%

Compact Wideband MIMO Diversity Antenna for Mobile Applications Using Multi-Layered Structure

et al. 2020

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A closely packed wideband multiple-input multiple-output (MIMO)/diversity antenna (of two ports) with a small size of less than 18.5 mm by 18.5 mm is proposed for mobile communication applications. The antenna can be orthogonally configured for corner installation or by placing it on a back-to-back structure for compact modules. To enhance the isolation and widen the bandwidth, the antenna is structured with multiple layers having differing dielectric constants. The feeding through a via significantly reduces the ground waves. A multi-fidelity surrogate model-assisted design exploration method is employed to obtain the optimized antenna geometric parameters efficiently. The antenna design was investigated using electromagnetic simulation and a physical realization of the optimal design was then created and subjected to a range of tests. The specific parameters investigated included reflection coefficients, mutual coupling between the input ports, radiation patterns, efficiency and parameters specific to MIMO behavior: envelope correlation coefficient and pattern diversity multiplexing coefficient. It was found that the antenna has an impedance bandwidth of approximately 4 GHz, mutual coupling between input ports of better than −18 dB and an envelope correlation coefficient of less than 0.002 across the operating band. This makes it a good candidate design for many mobile MIMO applications.

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Section: Diversity Gain Correlation and Multiplexing Efficiencymentioning

confidence: 78%

Compact Wideband MIMO Diversity Antenna for Mobile Applications Using Multi-Layered Structure

et al. 2020

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“…However, this antenna has a narrow matching bandwidth characteristic. In addition, a differential feeding method and perforated patch antenna for a shared-aperture antenna were proposed to achieve good isolation [10,11]. However, these studies have the subarray structure, which has a narrow scan range due to the grating lobe characteristic.…”

Section: Introductionmentioning

confidence: 99%

Design of S/X-Band Dual-Loop Shared-Aperture 2×2 Array Antenna

Wang

Jang²,

Kim³

et al. 2022

J Electromagn Eng Sci

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This article proposes the S/X band dual-loop shared-aperture 2 × 2 array antenna, which is constructed using a unit-cell having one Sband element stacked on 3 × 3 X-band elements. The unit-cell employs a coupled-fed dual-loop structure with a direct-feed pin on the upper loop to obtain the broadband matching characteristics and low manufacturing error. This radar configuration has the advantages of easy installation and low cost. In addition, the thin loop structure of the upper layer S-band element is optimized so that the S-band element has electromagnetic (EM) transparent characteristics in the X-band. The extended via cavity wall is also applied outside the nine Xband elements to block the mutual coupling effect among the X-band elements. To confirm the feasibility of the proposed array antenna, the beamforming performance and active reflection coefficient (ARC) characteristics of the fabricated array are examined in the S/X band.

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“…For the multi-layer shared-aperture array, perforated elements were applied to the upper elements to avoid the blockage of the upper-layer elements [22][23][24]. Nonetheless, it is difficult to apply this solution for space-efficient shared-aperture arrays, since there are many restrictions on the antenna shape and configuration of the upper and lower layers, which lead to the degradation of the array characteristics.…”

Section: Introductionmentioning

confidence: 99%

Design of a Polarization-Selective EM Transparent Mesh-Type E-Shaped Antenna for Shared-Aperture Radar Applications

Wang

Kim

Kim³

et al. 2022

Applied Sciences

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In this paper, we propose a polarization-selective electromagnetic (EM) transparent mesh-type E-shaped antenna unit-cell in a shared aperture. The proposed antenna unit-cell, which can be expanded to a larger array in a modular way, has one S-band antenna on the upper layer and nine X-band antennas on the lower layers. The simple E-shaped structure, which has a low profile with a good bandwidth, is used for the antenna elements. However, due to the limited aperture size of the stacked configuration, the lower-layer elements can be physically blocked by the upper-layer element. To reduce this blockage effect, the S-band element is rotated 90 degrees with respect to X-band elements so that the polarizations between the S- and X-band elements are perpendicular to each other. Moreover, to minimize performance degradation due to the blockage effect, a mesh structure is applied for S-band elements for EM transparent characteristics, thereby improving EM transparency from −30 dB to −1.5 dB. The extended via cavity wall is also employed outside the nine X-band elements to minimize the mutual coupling and to reduce antenna size. To confirm the effectiveness of the proposed design, the proposed antenna unit-cell is fabricated, and the radiation characteristics are measured, in a full anechoic chamber. The average bore-sight gains in the S- and X-band are 5 dBi and 4.5 dBi, respectively. The results confirm that the proposed design is suitable for shared-aperture radar applications.

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A shared‐aperture S/X dual broadband microstrip antenna with one perforated patch

Cited by 11 publications

References 11 publications

Compact Wideband MIMO Diversity Antenna for Mobile Applications Using Multi-Layered Structure

Compact Wideband MIMO Diversity Antenna for Mobile Applications Using Multi-Layered Structure

Design of S/X-Band Dual-Loop Shared-Aperture 2×2 Array Antenna

Design of a Polarization-Selective EM Transparent Mesh-Type E-Shaped Antenna for Shared-Aperture Radar Applications

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