Abstract
This paper presents a compact dual-band and dual-polarized millimeter-wave patch antenna array with satisfactory performance on element mutual coupling and beam scanning capabilities. Using capacitive feed technique and stacked configuration with extra parasitic strips, the proposed antenna array is able to achieve a wide operating bandwidth in both the low- and high-bands. In order to reduce the array's footprint, and to enhance the beam scanning performance in both bands, the element spacing is shrunk to less than 0.36 wavelength at 26 GHz. To improve the isolation between array elements due to their small spacings, two effective decoupling approaches are adopted, which result in a 6-dB isolation enhancement. The overall size of the proposed antenna array is only 18.2 mm ×4.1 mm ×1.07 mm, which is smaller than some industrial mm-Wave antenna modules released recently. Our simulation shows that the antenna array can fully cover the 5G NR bands of n258~n261 simultaneously. The four-element array provides ±60° and ±45° beam scanning performance in the low- and high-bands, respectively. The experimental data of reflection coefficient, mutual coupling, and radiation patterns confirm with the simulated results, rendering the proposed array to be a good candidate for 5G mm-Wave communications.
Highlights
Millimeter-wave technologies for 5G applications attract more and more attentions after the 2019 World Radiocommunication Conference (WRC-19), where a series of globally unified resolutions on mm-Wave frequency bands for International Mobile Telecommunications (IMT) are accomplished
In this paper, a dual-band and dual-polarized mm-Wave antenna array with decoupling structures has been proposed for 5G mobile terminal applications
The proposed design starts with the investigation of the antenna element, followed by two decoupling approaches for mutual coupling reduction in the low-band, the operating principle of which has been analyzed in detail
Summary
Millimeter-wave (mm-wave) technologies for 5G applications attract more and more attentions after the 2019 World Radiocommunication Conference (WRC-19), where a series of globally unified resolutions on mm-Wave frequency bands for International Mobile Telecommunications (IMT) are accomplished. The mm-Wave antennas in mobile phone are expected to offer multi-band coverage with dual-polarized function, they must be constructed in a limited size to form a compact antenna module. Such design specifications are very challenging for the academia and the industry. This paper mainly discusses an effective solution to meet the above-mentioned requirements and proposes a compact dual-band and dual-polarized patch antenna array with decoupling structures, which operates in the frequency bands of 26 GHz and 38 GHz. A 4-element antenna array based on this solution is able to provide ±60◦ and ±45◦ beam scanning capability in the two frequency bands, respectively.
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