4G / 5G antenna with small clearance for metal frame smartphone applications

2020 ◽  
Vol 63 (2) ◽  
pp. 596-605
Author(s):  
Guiping Jin ◽  
Wei Wang ◽  
Yi Sun ◽  
Dujiao Lu ◽  
Shaowei Liao
2020 ◽  
Vol 19 (7) ◽  
pp. 1078-1082 ◽  
Author(s):  
Horng-Dean Chen ◽  
Yuan-Chung Tsai ◽  
Chow-Yen-Desmond Sim ◽  
Colin Kuo

2020 ◽  
Vol 104 ◽  
pp. 229-240
Author(s):  
Peng Liu ◽  
Yufa Sun ◽  
Tao Liu ◽  
Qing Li ◽  
Xuefeng Wang

2018 ◽  
Vol 12 (9) ◽  
pp. 1477-1482 ◽  
Author(s):  
Yong‐Hang Zhang ◽  
Shi‐Rong Yang ◽  
Yong‐Ling Ban ◽  
Yun‐Fei Qiang ◽  
Jinhong Guo ◽  
...  

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 136
Author(s):  
Jianlin Huang ◽  
Zhuoni Chen ◽  
Qibo Cai ◽  
Tian Hong Loh ◽  
Gui Liu

A multiple-input-multiple-output (MIMO) antenna array for triple-band 5G metal-frame smartphone applications is proposed in this paper. Each single antenna element consists of an S-shaped feeding strip and an L-shaped radiation strip on the metal frame. The dimension of the antenna element is only 6.5 mm × 7 mm (0.076 λ0 × 0.082 λ0, λ0 is the free-space wavelength at the frequency of 3.5 GHz). The −6 dB impedance bandwidth of the proposed eight-antenna array can cover 3.3–3.8 GHz, 4.8–5 GHz, and 5.15–5.925 GHz. The evolution design and the analysis of the optimal parameters for a single antenna element are derived to investigate the principle of the antenna. The measured total efficiency is larger than 70%. The measured isolation is better than 13 dB. The measurements of the prototype agree well with the simulation results.


Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 348 ◽  
Author(s):  
Ziqiang Xu ◽  
Chenguang Ding ◽  
Qiangqiang Zhou ◽  
Yangtao Sun ◽  
Si Huang

A dual-antenna system operating at WIFI and GPS bands is proposed for common-metal rimmed smartphones applications. This dual-antenna system, which is horizontally placed on a ground plane of 4.5 × 75 mm2, consists of two folded inverted-F antennas (IFAs) sharing the same metal rim. Each IFA contains part of the metal radiating arm, and both IFAs own approximately one-quarter free space wavelengths at 2.44 GHz. A matching network is embedded in the feeding line of the left IFA to provide a resonant frequency at 1.575 GHz. By adjusting the positions of the shorting branch and feeding line, good impedance matching is obtained. Two gaps in the metal frame and a center shorting branch between two IFAs are adopted to improve the isolation. The isolations of better than 22 dB and 19 dB in GPS and WIFI bands are attained, respectively. The proposed antenna is fabricated, and the measured results regarding S-parameters, radiation efficiency, gain, as well as diversity performances are presented.


2019 ◽  
Author(s):  
Grazianne-Geneve V. Mendoza ◽  
Christie Sio

Filipino:Sa loob ng mahabang panahon, ang mga metodong pampananaliksik na ginagamit sa Sikolohiyang Pilipino (SP) ay hango sa pang-araw-araw na pakikipag-ugnayan ng mga Pilipino. Ngunit makalipas ang higit 40 taon simula nang unang itatag ang SP, malaki na ang pinagbago ng pakikipag-ugnayan at pakikitungo ng mga Pilipino sa isa’t isa dahil sa modernisasyon at pag-unlad ng teknolohiya. Gayundin, dumarami na rin ang mga iskolar ng SP na kumikilala sa kahalagahan ng pagsasakatutubo-mula-sa-labas upang higit pang mapayaman ang disiplina. Kabilang dito ang pag-aangkop ng mga lapit at metodong pampananaliksik. Bilang tugon sa mga pagbabagong ito, tinatampok sa kasalukuyang pag-aaral ang experience sampling method (ESM), isang metodong malaki ang potensiyal ngunit hindi pa nagagamit sa kontekstong Pilipino. Kumpara sa mga tradisyunal na metodo, may kakayahan ang ESM na suriin at pag-aralan ang karanasan ng tao, kabilang na ang kaniyang damdamin, saloobin, at kilos, habang nangyayari ito mismo sa kasalukuyan. Upang higit na mailapit ito sa araw-araw na buhay at gawi ng mga kalahok, marami nang mga smartphone applications o apps na magagamit sa pagsasagawa ng ESM. Sa papel na ito, tinasa ang kaangkupan ng ESM bilang metodong pampananaliksik sa SP sa pamamagitan ng paggamit nito sa pag-aaral ng mga emosyonal na karanasan ng mga Pilipinong kalahok. Batay sa mga obserbasyong nakalap mula sa pag-aaral, masasabing mayroong natatanging kontribusyon ang ESM sa pag-unlad ng SP dahil tugma ito sa layunin ng disiplina at malapit ito sa araw-araw na pamumuhay ng mga Pilipino sa makabagong panahon. Iminumungkahi ang paggamit ng ESM katuwang ng iba pang metodong kasalukuyang tinatanggap sa SP upang higit na mapalalim ang pag-unawa sa karanasang Pilipino.English:For the longest time, the research methods used in Sikolohiyang Pilipino (SP) are those derived from the day-to-day manner of communication among Filipinos. However, more than 40 years since SP was first established, modernity and rapid advancements in technology have greatly changed the way Filipinos interact and communicate with each other. At the same time, scholars have increasingly recognized the importance of indigenization-from-without to further enrich the study of SP, including the adoption of non-indigenous approaches to research. In response to these changes, the current study features the Experience Sampling Method (ESM), which, though currently underutilized in the Filipino context, has great potential in the study of it. Compared to traditional research methods, ESM allows researchers to study people’s experiences, including their emotions, thoughts, and behaviors, as they occur in the present. Furthermore, ESM smartphone applications or apps have been created to facilitate the use of ESM in obtaining a more representative sample of the everyday lives of participants. This paper aims to evaluate the appropriateness of ESM as a research method to be used in the study of SP. To do so, ESM was used to study the emotional experiences of Filipino participants. The observations derived from the study lend support to the unique contribution of ESM to the advancement of SP because it coincides with the goals of the discipline and simulates the day-to-day lives of Filipinos in the modern age. As such, ESM is recommended to be used with other methods currently used in SP to further deepen our understanding of the lives of Filipinos.


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