120-GHz-Band Amplifier Module with Hermetic Sealing Structure for 10-Gbit/s Wireless System

2014 ◽  
Vol E97.C (6) ◽  
pp. 583-591
Author(s):  
Hiroyuki TAKAHASHI ◽  
Toshihiko KOSUGI ◽  
Akihiko HIRATA ◽  
Jun TAKEUCHI ◽  
Koichi MURATA ◽  
...  
Keyword(s):  
Wireless System ◽  
Hermetic Sealing

Low Temperature Al-Al Thermo-compression Bonding with Sn Oxidation Protect Layer for Wafer-level Hermetic Sealing

2016 ◽  
Vol 136 (6) ◽  
pp. 237-243 ◽  
Author(s):  
Shiro Satoh ◽  
Hideyuki Fukushi ◽  
Masayoshi Esashi ◽  
Shuji Tanaka
Keyword(s):  
Low Temperature ◽  
Wafer Level ◽  
Hermetic Sealing

Shape Measurement of Canned Food to Verify Hermetic Sealing

2012 ◽  
Vol E95.C (10) ◽  
pp. 1662-1665
Author(s):  
Ryosuke SUGA ◽  
Shigenori TAKANO ◽  
Takenori YASUZUMI ◽  
Taichi IJUIN ◽  
Tetsuya TAKATOMI ◽  
...  
Keyword(s):  
Shape Measurement ◽  
Canned Food ◽  
Hermetic Sealing

A 60GHz CMOS Transceiver IC for a Short-Range Wireless System with Amplitude/Phase Imbalance Cancellation Technique

2012 ◽  
Vol E95.C (10) ◽  
pp. 1598-1609 ◽  
Author(s):  
Koji TAKINAMI ◽  
Junji SATO ◽  
Takahiro SHIMA ◽  
Mitsuhiro IWAMOTO ◽  
Taiji AKIZUKI ◽  
...  
Keyword(s):  
Short Range ◽  
Wireless System

scholarly journals Contact Mechanics of Rough Surfaces in Hermetic Sealing Studies

2018 ◽  
Author(s):  
Peter Ogar ◽  
Sergey Belokobylsky ◽  
Denis Gorokhov
Keyword(s):  
Contact Mechanics ◽  
Rough Surfaces ◽  
Hermetic Sealing

scholarly journals Strengthening Thermal Stability in V2O5-ZnO-BaO-B2O3-M(PO3)n Glass System (M = Al, Mg) for Laser Sealing Applications

2021 ◽  
Vol 11 (10) ◽  
pp. 4603
Author(s):  
Soyoung Kim ◽  
Karam Han ◽  
Seonhoon Kim ◽  
Linganna Kadathala ◽  
Jinhyeok Kim ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Expansion ◽  
Bond Strength ◽  
Coefficient Of Thermal Expansion ◽  
Glass Frit ◽  
Glass System ◽  
Fiber Types ◽  
Hermetic Sealing ◽  
Doped Glasses ◽  
Glass Panels

Today, the most common way of laser sealing is using a glass frit paste and screen printer. Laser sealing using glass frit paste has some problems, such as pores, nonuniform height, imperfect hermetic sealing, etc. In order to overcome these problems, sealing using fiber types of sealant is attractive for packaging devices. In this work, (70-x)V2O5-5ZnO-22BaO-3B2O3-xM(PO3)n glasses (mol%) incorporated with xM(PO3)n concentration (where M = Mg, Al, n = 2, 3, respectively) were fabricated and their thermal, thermomechanical, and structural properties were investigated. Most importantly, for this type of sealing, the glass should have a thermal stability (ΔT) of ≥80 °C and the coefficient of thermal expansion (CTE) between the glass and panel should be 1.0 ppm/°C. The highest thermal stability ΔT of the order of 93.2 °C and 112.9 °C was obtained for the 15 mol% of Mg(PO3)2 and Al(PO3)3 doped glasses, respectively. This reveals that the bond strength and connectivity is more strongly improved by trivalent Al(PO3)3. The CTE of a (70-x)V2O5-5ZnO-22BaO-3B2O3-xAl(PO3)3 glass system (mol%) (where x = 5–15, mol%) is in the range of 9.5–15.5 (×10−6/K), which is comparable with the CTE (9–10 (×10−6/K)) of commercial DSSC glass panels. Based on the results, the studied glass systems are considered to be suitable for laser sealing using fiber types of sealant.

scholarly journals Trajectory planning in UAV emergency networks with potential underlaying D2D communication based on K-means

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Shuo Zhang ◽  
Shuo Shi ◽  
Tianming Feng ◽  
Xuemai Gu
Keyword(s):  
Trajectory Planning ◽  
Trajectory Optimization ◽  
Communication Systems ◽  
Complete Coverage ◽  
Wireless System ◽  
Fifth Generation ◽  
Emergency Communications ◽  
Trajectory Length ◽  
Post Disaster ◽  
Joint Evaluation

AbstractAt present, unmanned aerial vehicles (UAVs) have been widely used in communication systems, and the fifth-generation wireless system (5G) has further promoted the vigorous development of them. The trajectory planning of UAV is an important factor that affects the timeliness and completion of missions, especially in scenarios such as emergency communications and post-disaster rescue. In this paper, we consider an emergency communication network where a UAV aims to achieve complete coverage of potential underlaying device-to-device (D2D) users. Trajectory planning issues are grouped into clustering and supplementary phases for optimization. Aiming at trajectory length and sum throughput, two trajectory planning algorithms based on K-means are proposed, respectively. In addition, in order to balance sum throughput with trajectory length, we present a joint evaluation index. Then relying on this index, a third trajectory optimization algorithm is further proposed. Simulation results show the validity of the proposed algorithms which have advantages over the well-known benchmark scheme in terms of trajectory length and sum throughput.

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