Self-Decoupled, 5G NR77/78/79 Two-Antenna System for Notebook Computers

Chang, Wen Hsin; Su, Saou‐Wen; Tseng, Bin-Chyi

doi:10.1109/edaps47854.2019.9011620

Cited by 7 publications

(9 citation statements)

References 4 publications

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“…With the impedance matching better than −6 dB (VSWR of 3), the reflection coefficients cover the 3.4-3.6 GHz band. Note that the −6 dB impedance is usually defined for 5G mobile antennas as shown in [17][18][19][20][21][22][23]. Additionally, owing to the orthogonal polarization between the loop's two ports, low transmission coefficient lower than −32 dB is also achieved.…”

Section: Reflection Coefficients Transmission Coefficient and Tarcmentioning

confidence: 99%

Compact, Dual-Polarized, Oblong Loop Antenna for 5g Laptops

Su¹

2022

PIER M

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A compact, two-port, oblong loop antenna producing two orthogonal waves for fifthgeneration (5G) operation in the 3.4-3.6 GHz band with transmission coefficient (S 12 ) lower than −32 dB and excellent envelope correlation coefficient (ECC) less than 0.002 is introduced for laptop antenna applications. Unlike the conventional, probe-fed, dual-polarized patch antennas, the proposed design uses the loop antenna fed by the coaxial cables and has a coplanar structure. The loop antenna is placed 1 mm above the top edge of the display, has a compact size of 30 mm × 4 mm and two feed ports spaced merely 2 mm (about 0.02-λ at 3.4 GHz) apart. Port1 is designed as a coupling feed to the loop while port2 is a direct feed in the loop, all located along the loop's central line. With this feeding arrangement, port2 is located in the current-null region when port1 is excited, whereas maximum currents of port1 excitation are located in the current nulls of port2 excitation. These properties lead to two decoupled, orthogonal radiating waves with very low ECC. Additionally, due to the oblong structure of the loop, pattern diversity is also achieved. Details of the dual-polarized loop antenna for 5G applications are presented.

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Section: Reflection Coefficients Transmission Coefficient and Tarcmentioning

confidence: 99%

Compact, Dual-Polarized, Oblong Loop Antenna for 5g Laptops

Su¹

2022

PIER M

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“…That is, the one-wavelength dipole mode is decreased toward the half-wavelength mode at about 3.6 GHz and combines with the half-wavelength mode. As a result of two resonant modes of similar magnitude but counter-phases on the half of the shared radiator, 16,20 the common dipole is decoupled. Figure 4(A) shows the measured and the simulated (presented in corresponding dashed lines) S-parameters for the fabricated prototype.…”

Section: Decoupling Analysesmentioning

confidence: 99%

“…For port1 excitation in the experiments, the counterpart port2 was TABL E 1 Comparison of the MIMO antennas. [9][10][11][12][13][14][15][16][17][18][19][20] Isolation is obtained from the worst case (largest value) for all the bands between the connected to a 50-Ω load. The same setup was applied to the port2 measurement.…”

Section: Decoupling Analysesmentioning

confidence: 99%

“…On the dipole center, where currents are at a null for dipole's one-wavelength mode and maximum for half-wavelength mode, is added a capacitive load as distributed capacitance. This capacitance can increase the effective resonant length in the current-null location, allowing the one-wavelength resonance to be shifted toward the half-wavelength one, such that mode cancellation decoupling 16,20 is attained. With a height of 5 mm, the design is ideal for narrow-bezel laptops 21,22 and has simpler structure compared with the previous wideband antenna pair designs in References 18-20.…”

Section: Introductionmentioning

confidence: 99%

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Decoupled multi‐input multi‐output antennas with a common dipole for wideband 5G laptop computers

Lee

2020

Micro & Optical Tech Letters

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Two decoupled antennas, comprising two feeding monopoles and one dipole shared by the monopoles, for the fifth‐generation (5G) multi‐input multi‐output (MIMO) applications are proposed. The feeding monopoles are placed on both sides of the coupled‐fed, common dipole. First, to operate in the 3.3–5.0 GHz 5G wideband, two resonant modes at about 3.6 and 4.7 GHz, contributed to by the common dipole and the feeding monopoles respectively, are utilized. Then, by introducing distributed capacitance loaded on the dipole center, the one‐wavelength dipole resonant mode can be lowered to oppose the counter‐phased half‐wavelength mode currents on the half dipole, resulting in self decoupling around 3.6 GHz. The mutual coupling for the common dipole is reduced by about 19 dB in this study. The design shows a small size of 35 mm × 5 mm (0.38‐wavelength × 0.05‐wavelength at 3.3 GHz) and can be a promising candidate for narrow‐bezel 5G laptop computers.

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“…However, closely-packed antenna elements in the same frequency bands usually su er from high mutual coupling, which degrades the RF sensitivity of the multiantenna system. Numerous decoupling methods have been studied in the literature [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. One often-seen decoupling method is to introduce an additional coupling path between the antennas to counter the original coupling by adding the resonant structure [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Conjoined, Two-Monopole Antenna Pair with Decoupling Inductor for Wi-Fi 6E Notebook Applications

Juan

Chang

2022

International Journal of Antennas and Propagation

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A low-profile, conjoined and yet decoupled two-monopole design for Wi-Fi 6E notebook applications is presented. The single monopole antenna has a small size of 4 mm × 18.7 mm. The antenna is composed of a two-branched monopole with two shorting inductors for producing the 5 GHz (5150–5825 MHz) and 6 GHz (5925–7125 MHz) bands, and an inductor loaded at one branch end and connecting to a tuning portion for 2.4 GHz (2400–2484 MHz) operation. Two symmetrical monopoles are further conjoined by a chip inductor that connects the open ends of the tuning portions, forming a compact footprint of 4 mm × 38.4 mm for the two-notebook antenna design. With the use of the decoupling inductor and a proper two-monopole arrangement, acceptable isolation and a low envelop correlation coefficient (ECC) can be attained.

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Self-Decoupled, 5G NR77/78/79 Two-Antenna System for Notebook Computers

Cited by 7 publications

References 4 publications

Compact, Dual-Polarized, Oblong Loop Antenna for 5g Laptops

Compact, Dual-Polarized, Oblong Loop Antenna for 5g Laptops

Decoupled multi‐input multi‐output antennas with a common dipole for wideband 5G laptop computers

Conjoined, Two-Monopole Antenna Pair with Decoupling Inductor for Wi-Fi 6E Notebook Applications

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