Miniaturized Dual-Band Broadside/Endfire Antenna-in-Package for 5G Smartphone

Seo, Ji Hoon; Yoon, Inseop; Jung, Jaebaek; Ryoo, Jeongki; Park, Juhyoung; Lee, Woncheol; Ko, Dong-Ok; Oh, Jungsuek

doi:10.1109/tap.2021.3088230

Cited by 74 publications

(13 citation statements)

References 26 publications

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“…Recently, several dualband dual-polarized mmWave antennas have been proposed for 5G applications [6]- [12]. These designs use either stacked patches [6]- [11] or planar dipoles [12]. However, their height profiles are in the range of 2 − 4 mm, whereas the typical thickness of the printed circuit boards (PCBs) used in cell phones is around 1 mm.…”

Section: Introductionmentioning

confidence: 99%

“…The large sizes of the antennas make them impractical for 5G smartphones. A recently developed patch array with a multilayer reactive impedance surface (RIS) [11] achieves a bandwidth of 26.22-29.57 GHz on a 1.122 mm thick substrate. A major issue with patch antennas is that they inherently exhibit broadside radiation with sub-hemispherical coverage.…”

Section: Introductionmentioning

confidence: 99%

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A Low-Profile Dual-Band Dual-Polarized Quasi-Endfire Phased Array for mmWave 5G Smartphones

Rao

Sarabandi

2022

IEEE Access

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This paper presents a very low-profile (0.105λ 0 at 28 GHz) dual-band dual-polarized millimeter-wave phased array for 5G smartphones. The array element is based on two distinct dual-band antennas to realize two orthogonal linear polarizations. A planar folded dipole with a parasitic strip is used to produce horizontally polarized radiation, and a novel hexagonal bridge antenna is devised to generate vertically polarized radiation while maintaining a very low profile. A prototype of a 1 × 4 phased array is designed and implemented on a multilayer laminate using standard printed circuit board process. The real estate of the array is kept within 6.5 mm × 23 mm × 1.12 mm. For both polarizations, the −10 dB bandwidth covers 25.4-30.84 GHz and 38-40 GHz with peak gains of 11.31 and 11.93 dBi at two center frequencies, respectively. The overlapped 3 dB scan ranges between both polarizations are ±45 • at 28 GHz and ±39 • at 39 GHz. This work considers a number of important design challenges of implementing low-cost mmWave antennas in smartphones, providing a practical solution to mmWave 5G mobile devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Low-Profile Dual-Band Dual-Polarized Quasi-Endfire Phased Array for mmWave 5G Smartphones

Rao

Sarabandi

2022

IEEE Access

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“…18). If the termination criterion is fulfilled (e fit,l < e criterion ), the individual with the optimized holographic multi-feed antenna configuration is found (see 8 in Fig. 18).…”

Section: Design Of the Holographic Multi-feed Antennamentioning

confidence: 99%

Angle-Dependent Synthesis Method for Holographic Multi-Feed Antennas

Frey

Döring

Riese

et al. 2023

IEEE Open J. Antennas Propag.

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A novel synthesis method for holographic multi-feed antennas is presented to combine all sub-holograms into an angle-dependent shared holographic aperture. In order to find the global error minimum between the shared holographic aperture and all ideal sub-holograms, a non-pixel-based genetic optimization is used. For a more accurately implementation of the analytical impedance tensor an eigenvector approach taking all tensor components into account is introduced. The optimized holographic antenna has four feeds for an exemplary integration into a 2D-monopulse radar system and is realized on a fused silica wafer due to its lower loss at millimeter-wave frequencies compared to Teflon-based materials. The antenna prototype provides a measured gain of 23 dBi, a polarization purity of 26 dB and a side-lobe level of 20 dB for feed 1, 2 and 4 is reached across 76 GHz−81 GHz. The S-parameters are measured from 60 GHz to 90 GHz, and a reflection coefficient of −14 dB and an inter-port coupling <−38 dB are achieved. The measured 2D-monopulse patterns provide a FOV of 10°, the sum beam has a gain of 26 dBi leading to an aperture efficiency of 45 % and the differential beams show a null depth of 30 dB.INDEX TERMS holographic antenna, metasurface antenna, multi-feed antenna, multi-beam antenna, surface wave, leaky wave, monopulse radar, glass technology.

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“…On one hand, antennas are required to have broadband transmission characteristics [1][2][3]. On the other hand, antennas are required to be small in size and light in weight [4,5]. Therefore, when adopting RCS reduction methods such as antenna reflectors [6], AMC [7,8], and radome [9], the size of space loading should be considered to avoid space waste.…”

Section: Introductionmentioning

confidence: 99%

A Low RCS and Array-Insensitive FSS Wideband Radome

Gong,

Zhang,

Wang

et al. 2023

Electronics

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In order to further expand the RCS reduction model of the miniature broadband antenna, a four-notch shaped FSS radome insensitive to the number of array elements is designed based on the multi-layered medium Green’s function and the transflective coefficient of the finite radome is derived. The calculated results are in good agreement with the infinite array, showing broadband transmission performance in both C-band and X-band. The electric field distribution and far-field distribution of a finite FSS array are given and the effects of a 5 × 5 array in a V-shaped structure on the surface of a miniature broadband antenna on its gain coefficient and RCS reduction characteristics are calculated numerically. The results show that the designed radome exhibits good array element insensitivity and far-field scattering reduction characteristics and achieves significant in-band and out-of-band RCS accurate reduction under the premise of constant antenna radiation performance. At normal incidence, the single-station RCS in the passband and stopband are as low as −35 dB and −32.66 dB, respectively. The maximum reduction in the transmission band reaches 20.96 dB under oblique incidence and the projection size of the radome decreases with the increase in the bottom angle of the radome but the RSC reduction performance is basically unaffected and can be adjusted flexibly according to actual needs. The above results provide a theoretical basis and technical support for the application of FSS radome in RCS reduction in micro wideband antennas.

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Miniaturized Dual-Band Broadside/Endfire Antenna-in-Package for 5G Smartphone

Cited by 74 publications

References 26 publications

A Low-Profile Dual-Band Dual-Polarized Quasi-Endfire Phased Array for mmWave 5G Smartphones

A Low-Profile Dual-Band Dual-Polarized Quasi-Endfire Phased Array for mmWave 5G Smartphones

Angle-Dependent Synthesis Method for Holographic Multi-Feed Antennas

A Low RCS and Array-Insensitive FSS Wideband Radome

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