Ultra-Low Profile, Compact Quasi-Yagi Antenna Suitable for IoT Application

2021 ◽  
Author(s):  
M Habib Ullah ◽  
M Jasim Uddin ◽  
Syed Zahurul Islam
Keyword(s):  
Low Profile ◽  
Yagi Antenna

scholarly journals A Planar Quasi-Yagi For Next Generation Wireless Communication Systems

2008 ◽  
Author(s):  
Mai Thanh Nga ◽  
Vu Van Yem ◽  
Nguyen Huu Thanh ◽  
Pham Duy Phong
Keyword(s):  
Global Positioning System ◽  
Communication Systems ◽  
Cell Phone ◽  
Wireless Communication Systems ◽  
Optimal Model ◽  
Low Profile ◽  
Yagi Antenna ◽  
Global Positioning ◽  
Universal Mobile Telecommunications System ◽  
Better Than

UMTS (Universal Mobile Telecommunications System) technology is one of the third-generation (3G) cell phone technologies, which is also being developed into a 4G technology. Although UMTS2001 is the most widely-deployed UMTS band, some countries utilize 1900 MHz instead. Besides, the co-existing GPS (Global Positioning System) operates at the frequency of 1575 MHz. Thus, a desirable antenna in UMTS systems needs to cover both of two bands in order to operate in various devices. This paper will propound an antenna covering the range of frequencies from 1.53 GHz to 2.53 GHz that includes 1.575 GHz, 1.8 GHz, 1.9 GHz ,and 2.1 GHz. The developed quasi-Yagi antenna has a simple-low profile and achieves a bandwidth of 48%, a front- to- back ratio of 19 dB, a gain of 6dBi, and an efficiency of better than 78% at 2.1GHz. In this paper, the study on effects of parameters of the antenna is also investigated to achieve optimal model.

Low-Profile Helical Quasi-Yagi Antenna Array With Multibeams at the Endfire Direction

2017 ◽  
Vol 16 ◽  
pp. 1241-1244 ◽  
Author(s):  
Zhenxin Hu ◽  
Wenwei Wang ◽  
Zhongxiang Shen ◽  
Wen Wu
Keyword(s):  
Antenna Array ◽  
Low Profile ◽  
Yagi Antenna

Low-Profile Top-Hat Monopole Yagi Antenna for End-Fire Radiation

2015 ◽  
Vol 63 (7) ◽  
pp. 2851-2857 ◽  
Author(s):  
Zhenxin Hu ◽  
Zhongxiang Shen ◽  
Wen Wu ◽  
Jian Lu
Keyword(s):  
Low Profile ◽  
Yagi Antenna

scholarly journals A Quasi-Yagi Antenna Backed by a Jerusalem Cross Frequency Selective Surface

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Sergio E. Melais ◽  
David Cure ◽  
Thomas M. Weller
Keyword(s):  
Ground Plane ◽  
Angular Spectrum ◽  
Frequency Selective Surface ◽  
Frequency Stability ◽  
Ism Band ◽  
Operating Band ◽  
Low Profile ◽  
Yagi Antenna ◽  
Frequency Selective ◽  
Incident Waves

A quasi-Yagi antenna is developed to operate at 2.4 GHz (ISM band) presenting a low profile and off-axis radiation when packaged over a metal ground plane. The off-axis radiation is realized by incorporating a Jerusalem cross frequency selective surface (JC-FSS) as the ground plane for the antenna. A JC-FSS is preferred because of its frequency stability in the operating band for a large angular spectrum (≈70°) of TE- and TM-polarized incident waves. In this research, the substrate of the antenna flush-mounted on top of the FSS is added to the JC-FSS model and allows for a smaller cell grid. The prepared quasi-Yagi antenna over the JC-FSS offered 260 MHz of functional bandwidth and 54° of beam tilt towards the end-fire direction. To the best of the authors’ knowledge this is the first instance that these two structures are combined for off-axis radiation. Additionally, to support the preferred use of the JC-FSS, the quasi-Yagi is backed by a square patch (SP) FSS for comparison purposes.

6F Low-Profile Stents zur Anlage eines TIPSS – ein Widerspruch?

2008 ◽  
Vol 180 (S 1) ◽  
Author(s):  
J Wiskirchen ◽  
K Brechtel ◽  
A Fischmann ◽  
G Tepe ◽  
S Miller ◽  
...  
Keyword(s):  
Low Profile

A New Fixed-wire, ‘Stent-on-a-wire’, Very-low-profile Stent Delivery System – Rationale, Design and Update

2010 ◽  
Vol 5 (1) ◽  
pp. 20 ◽  
Author(s):  
Tim A Fischell ◽  
Keyword(s):  
Delivery System ◽  
Cost Savings ◽  
Coronary Stenting ◽  
Bleeding Complications ◽  
Need For Closure ◽  
Procedural Cost ◽  
Low Profile ◽  
Direct Stenting ◽  
Coronary Artery Stenting ◽  
Time Required

Coronary artery stenting has evolved substantially since the first use of coronary stenting as an adjunct to balloon angioplasty in the early 1990s. The performance (and particularly the deliverability) of coronary stents has improved such that coronary stenting is now the primary mode of revascularisation for percutaneous coronary interventions (PCIs) in more than 95% of cases. The new Svelte™ stent-on-a-wire (SOAW) delivery system represents one of the first substantive innovations in stent delivery systems (SDS) in more than a decade. This SDS uses a shapeable ‘fixed wire’ as an integral part of the SDS. This allows a significant reduction in SDS profile (~0.029 inches) compared with conventional monorail or over-the-wire SDS. This SOAW SDS is intended to facilitate direct stenting. It has the potential to provide substantial procedural cost savings by eliminating the need for a coronary guidewire and balloon pre-dilatation and/or post-dilatation, and by reducing contrast use and the time required to complete the procedure. The SOAW system is compatible with 5Fr guiding catheters, and may reduce the need for closure devices, facilitate stenting via the radial approach and (potentially) reduce bleeding risks. In conclusion, the Svelte SOAW SDS represents a new very-low-profile balloon-expandable SDS that should promote direct stenting in PCIs. The efficiency and small profile of this SDS may allow procedural cost savings, a reduction in procedure time and a reduced risk of bleeding complications. These theoretical advantages will need to be demonstrated in clinical trials.

A Low-Profile Dual-Polarized Directional Antenna for Enhancing Channel Capacity in Indoor MIMO Systems

2010 ◽  
Vol E93-B (10) ◽  
pp. 2570-2577 ◽  
Author(s):  
Daisuke UCHIDA ◽  
Hiroyuki ARAI ◽  
Yuki INOUE ◽  
Keizo CHO
Keyword(s):  
Channel Capacity ◽  
Mimo Systems ◽  
Directional Antenna ◽  
Low Profile ◽  
Dual Polarized
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