Low profile filter using open disk dual mode dielectric resonators for microcellular base station

1995 ◽  
Author(s):  
Youhei Ishikawa ◽  
Seiji Hidaka ◽  
Jun Hattori
Keyword(s):  
Base Station ◽  
Dielectric Resonators ◽  
Open Disk ◽  
Dual Mode ◽  
Low Profile

Low-profile filter using open disk dual-mode dielectric resonators

1996 ◽  
Vol 79 (3) ◽  
pp. 16-25
Author(s):  
Youhei Ishikawa ◽  
Seiji Hidaka ◽  
Tomoyuki Ise ◽  
Norifumi Matsui
Keyword(s):  
Dielectric Resonators ◽  
Open Disk ◽  
Dual Mode ◽  
Low Profile

scholarly journals Design, modeling, and demonstration of a new dual-mode back-assist exosuit with extension mechanism

2021 ◽  
Vol 2 ◽  
Author(s):  
Erik P. Lamers ◽  
Karl E. Zelik
Keyword(s):  
Biomechanical Model ◽  
Mode Switching ◽  
Design Parameters ◽  
Dual Mode ◽  
Extension Mechanism ◽  
Body Forces ◽  
Low Profile ◽  
Military Healthcare ◽  
The Moment ◽  
Practical Factors

Abstract Occupational exoskeletons and exosuits have been shown to reduce muscle demands and fatigue for physical tasks relevant to a variety of industries (e.g., logistics, construction, manufacturing, military, healthcare). However, adoption of these devices into the workforce has been slowed by practical factors related to comfort, form-factor, weight, and not interfering with movement or posture. We previously introduced a low-profile, dual-mode exosuit comprised of textile and elastic materials to address these adoption barriers. Here we build upon this prior work by introducing an extension mechanism that increases the moment arm of the exosuit while in engaged mode, then collapses in disengaged mode to retain key benefits related to being lightweight, low-profile, and unobstructive. Here we demonstrate both analytically and empirically how this extensible exosuit concept can (a) reduce device-to-body forces (which can improve comfort for some users and situations), or (b) increase the magnitude of torque assistance about the low back (which may be valuable for heavy-lifting jobs) without increasing shoulder or leg forces relative to the prior form-fitting exosuit. We also introduce a novel mode-switching mechanism, as well as a human-exosuit biomechanical model to elucidate how individual design parameters affect exosuit assistance torque and device-to-body forces. The proof-of-concept prototype, case study, and modeling work provide a foundation for understanding and implementing extensible exosuits for a broad range of applications. We envision promising opportunities to apply this new dual-mode extensible exosuit concept to assist heavy-lifting, to further enhance user comfort, and to address the unique needs of last-mile and other delivery workers.

A Low-Profile Base-Station Antenna

2018 ◽  
Author(s):  
Son Xuat Ta ◽  
Minh Duc Nguyen ◽  
Khac Kiem Nguyen ◽  
Chien Dao-Ngoc
Keyword(s):  
Base Station ◽  
Low Profile
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