Research on high-gain and broad-band backfire antenna

1987 ◽  
Vol 4 (1) ◽  
pp. 69-72
Author(s):  
Song Ximing
Keyword(s):  
Broad Band ◽  
High Gain

scholarly journals A Novel Hook-Shaped Antenna Operating at 28 GHz for Future 5G mmwave Applications

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 673
Author(s):  
Mian Kamal ◽  
Shouyi Yang ◽  
Saad Kiani ◽  
Daniyal Sehrai ◽  
Mohammad Alibakhshikenari ◽  
...  
Keyword(s):  
Antenna Array ◽  
Communication Systems ◽  
Broad Band ◽  
High Gain ◽  
Single Element ◽  
Total Efficiency ◽  
Potential Candidate ◽  
Next Generation ◽  
Dual Beam ◽  
Element Array

To address atmospheric attenuation and path loss issues in the mmwave portion of the spectrum, high gain and narrow beam antenna systems are essential for the next generation communication networks. This paper presents a novel hook-shaped antenna array for 28 GHz 5G mmwave applications. The proposed antenna was fabricated on commercially available Rogers 5880 substrate with thickness of 0.508 mm and dimensions of 10 × 8 mm2. The proposed shape consists of a circle with an arc-shaped slot on top of it and T-shaped resonating lengths are introduced in order to attain broad band characteristics having gain of 3.59 dBi with radiation and total efficiency of 92% and 86% for single element. The proposed structure is transformed into a four-element array with total size of 26.9 × 18.5 mm2 in order to increase the gain up to 10.3 dBi at desired frequency of interest. The four-element array is designed such that it exhibits dual-beam response over the entire band of interest and the simulated results agree with fabricated prototype measurements. The proposed antenna array, because of its robustness, high gain, and dual-beam characteristics can be considered as a potential candidate for the next generation 5G communication systems.

Broad-band high-gain room temperature photodetectors using semiconductor–metal nanofloret hybrids with wide plasmonic response

Nanoscale ◽  
2019 ◽  
Vol 11 (13) ◽  
pp. 6368-6376 ◽  
Author(s):  
Amir Ziv ◽  
Avra Tzaguy ◽  
Zhiyuan Sun ◽  
Shira Yochelis ◽  
Emmanuel Stratakis ◽  
...  
Keyword(s):  
Room Temperature ◽  
Broad Band ◽  
Optoelectronic Device ◽  
High Gain ◽  
Spectral Detection

We present an optoelectronic device for broad spectral detection using SiGe nanowires coupled to a plasmonic antenna.

scholarly journals The Tunable, Narrow-Bandwidth Excimer Laser, the New Workhorse for Photochemistry in the UV and VUV

1983 ◽  
Vol 3 (1-6) ◽  
pp. 307-310
Author(s):  
K. Hohla ◽  
W. Mückenheim ◽  
D. Basting
Keyword(s):  
Excimer Laser ◽  
Broad Band ◽  
High Gain ◽  
Four Wave Mixing ◽  
Excimer Lasers ◽  
Spectral Brightness ◽  
Wave Mixing ◽  
Laser Transition ◽  
Linear Processes ◽  
Narrow Bandwidth

Excimer lasers are powerful sources of radiation in the UV, providing several laser lines between 157 and 353 nm. The excimer laser transition is bound-free, and thus the emitted wavelengths are broad-band (up to 200 cm−1). In addition the high gain (0.15 cm−1) of the laser gas causes a rather large divergence (>1 mrad) in conventional excimer lasers.A new excimer laser concept is described which improves the spectral brightness in terms of watt/(rad × bandwidth) by three orders of magnitude. This allows, through non-linear processes such as Raman shifting the fundamental output and four-wave-mixing in gases, the generation of new laser lines in the UV and VUV.

Ultraviolet Femtosecond Pulse Amplification with High Gain Using Solid-State, Broad-Band Gain Medium Ce3+:LiCaAlF6

2001 ◽  
Vol 40 (Part 1, No. 4A) ◽  
pp. 2308-2309 ◽  
Author(s):  
Zhenlin Liu ◽  
Toshimasa Kozeki ◽  
Yuji Suzuki ◽  
Nobuhiko Sarukura ◽  
Kiyoshi Shimamura ◽  
...  
Keyword(s):  
Solid State ◽  
Femtosecond Pulse ◽  
Broad Band ◽  
High Gain ◽  
Gain Medium ◽  
Pulse Amplification

Instability of a two-dimensional compressible jet

1970 ◽  
Vol 42 (1) ◽  
pp. 151-159 ◽  
Author(s):  
C. H. Berman ◽  
J. E. Ffowcs Williams
Keyword(s):  
Broad Band ◽  
Supersonic Jet ◽  
Nonlinear Effects ◽  
Maximum Growth ◽  
Vortex Sheet ◽  
High Gain ◽  
Maximum Growth Rate ◽  
Two Dimensional ◽  
Mean Flow ◽  
Wide Range

A linearized analysis of the two-dimensional double vortex sheet model of a jet shows that inviscid jet instabilities occur over a wide range of frequencies at all jet Mach numbers. No particular frequency for maximum growth rate exists unless finite shear layer thickness effects are considered. It is suggested that the model describes the essential characteristics of a real jet disturbed by long wavelength perturbations. The idea is advanced that the jet flow constitutes a broad band amplifier of high gain. Disturbances can grow rapidly to a size when nonlinear effects bring about significant interaction with the mean flow. By seeding the jet with disturbances of a type that are highly amplified it is argued that gross features of the flow may be affected and that the jet may be rendered less noisy at high Mach number. It is argued that some of these ideas are supported by the observation that a supersonic jet diffuses at an unusually rapid rate when subject to the oscillatory condition known as ‘screech’.

scholarly journals Broad Band Propinquity Coupled Feed Line Micro-strip Blotch Antenna for 5G Applications

2019 ◽  
Vol 8 (9S) ◽  
pp. 290-296
Keyword(s):  
Broad Band ◽  
Research Work ◽  
High Gain ◽  
Feeding Method ◽  
Array Configuration ◽  
Communication Devices ◽  
Planar Array ◽  
Smart Mobile Phone ◽  
Smart Mobile ◽  
Future Work

In this research based paper, as the need of capacity is increasing very frequently so the demand of smart mobile phone and other wireless communication devices are increasing. The only technology that would be able to fastly fulfill the increasing communication capacity is 5G. For the establishment of communication between the devices of wireless on the higher band of frequencies like mm wave (mili-meter) there is much demand of such type of antennas that are lesser in size, not much expansive, compact and also main easy to fabricate as well as simulate. So, according to all these requirements the antennas that can fulfill all the requirements are only the patch antennas. The Micro-strip blotch Antenna and the authentic viewpoint are shown with high gain millimeter-wave antenna. The micro-strip blotch Antenna has high gain more prominent ground as of late. The Antenna has a good return-loss, gain up-to 11.91dB and the directivity 12.62dB at 28GHz frequency with 6×5 micro-strip planar array configuration with Propinquity coupled planar array Feeding method & line feed method procedure, it gives advantages over traditional conventional Antennas and benefits for 5G applications. In this research work for the implementation the designing and simulation work done on CST TOOL. This simulation is basically performed for coup-led propinquity and line feed for 5G application in future work together.

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