Compact 5G MIMO Mobile Phone Antennas With Tightly Arranged Orthogonal-Mode Pairs
By Libin Sun, Haigang Feng, Yue Li, Zhijun Zhang. IEEE Transactions on Antennas and Propagation, 2018
257 citations recorded by the source corpus.
In this communication, the novel compact tightly arranged pairs are employed to form a <inline-formula> <tex-math notation="LaTeX">$4 \times 4$ </tex-math></inline-formula> multiple-input-multiple-output (MIMO) system and an <inline-formula> <tex-math notation="LaTeX">$8 \times 8$ </tex-math></inline-formula> MIMO system operating at 3.4–3.6 GHz for fifth-generation (5G) mobile phones. Each tightly arranged pair is composed of a bent monopole and an edge-fed dipole with a compact size of <inline-formula> <tex-math notation="LaTeX">$7 \times 12$ </tex-math></inline-formula> mm<sup>2</sup>. The orthogonal-mode method is presented to mitigate the mutual coupling of the tightly arranged pairs without any external decoupling structure. With the help of the orthogonal mode, isolation performances across the desired band of the <inline-formula> <tex-math notation="LaTeX">$4 \times 4$ </tex-math></inline-formula> MIMO system and the <inline-formula> <tex-math notation="LaTeX">$8 \times 8$ </tex-math></inline-formula> MIMO system are better than 20 and 17 dB, respectively, with the elements closely spaced. The measured efficiencies are 51.7%–84.5%/49%–72.9%, and the measured envelope correlation coefficients are less than 0.06/0.07 for the <inline-formula> <tex-math notation="LaTeX">$4 \times 4/ 8 \times 8$ </tex-math></inline-formula> MIMO system. The proposed MIMO systems provide a promising solution to compact 5G MIMO mobile phone antennas with good isolation and diversity performance.
Subfields: Aerospace Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/913188f2f89141d212e4e2035a58b8c6138e7f57
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Citations in the corpus
- MIMO Antenna With Compact Decoupled Antenna Pairs for 5G Mobile Terminals (2019, methodology): “Although the antenna structures proposed in [6], [11]–[13], and [18] have compact size, the antenna elements have to be located at both sides of the system ground plane.”
- Tightly Arranged Four-Element MIMO Antennas for 5G Mobile Terminals (2019, background): “In the last years, many internal-decoupling dual-antenna prototypes have been proposed by using multiple polarizations [23]–[26], the theory of characteristic modes (TCM) [27]–[28], even and odd modes [29], [30], and mirrored elements [31], [32].”