A novel Ku/K band reflectarray antenna with reduced phase slope and phase sensitivity

2021 ◽  
Author(s):  
Kavitha Narayanasamy ◽  
Gulam Nabi Alsath Mohammed ◽  
Kirubaveni Savarimuthu ◽  
Ramprabhu Sivasamy ◽  
Malathi Kanagasabai
Keyword(s):  
Phase Sensitivity ◽  
Phase Slope ◽  
Reflectarray Antenna ◽  
K Band

Design of W-band Wideband Low Phase Sensitivity Dual-Reflectarray Antenna with Beam Steering

2019 ◽  
Vol 17 (4) ◽  
pp. 61-68
Author(s):  
Eun-Cheol Choi ◽  
Sangwook Nam ◽  
Ji-Hyung Kim ◽  
Gyung-Hyun Oh ◽  
Sang-Jin Shin
Keyword(s):  
Beam Steering ◽  
Phase Sensitivity ◽  
W Band ◽  
Reflectarray Antenna

Enhanced Reflectarray Antenna Using Elements With Reduced Reflection Phase Sensitivity

2018 ◽  
Vol 17 (7) ◽  
pp. 1334-1338 ◽  
Author(s):  
Bahman Mohammadi ◽  
Javad Nourinia ◽  
Changiz Ghobadi ◽  
Abdelhady Mahmoud ◽  
Mohsen Karamirad ◽  
...  
Keyword(s):  
Phase Sensitivity ◽  
Reflection Phase ◽  
Reflectarray Antenna

scholarly journals Dielectric Resonator Reflectarray Antenna Unit Cells for 5G Applications

2018 ◽  
Vol 8 (4) ◽  
pp. 2531
Author(s):  
Nur Fazreen Sallehuddin ◽  
Mohd Haizal Jamaluddin ◽  
Muhammad Ramlee Kamarudin ◽  
Muhammad Hashim Dahri ◽  
Siti Umairah Tajol Anuar
Keyword(s):  
Computer Simulation ◽  
Dielectric Resonator ◽  
Unit Element ◽  
Performance Comparison ◽  
Optimum Configuration ◽  
Microstrip Patch ◽  
Phase Slope ◽  
Unit Cells ◽  
Phase Range ◽  
Reflectarray Antenna

This paper presents an investigation for the performance comparison of three different unit cell configurations operating at 26 GHz for 5G applications. The unit cells are cross shape dielectric resonator, cross microstrip patch and cross hybrid dielectric resonator. Verification of the comparison has been done by simulations using commercial Computer Simulation Technology Microwave Studio (CST MWS). The simulated results for reflection phase, slope variation, reflection loss and 10% bandwidth were analyzed and compared. The results indicate that the optimum configuration to be deployed for the reflectarray’s unit element in order to fulfill the 5G requirements of a wide bandwidth is the cross hybrid DRA. This configuration is a combination of cross DRA with cross microstrip patch as the parasitic element in order to tune the phase and provide a wide phase range with smooth variation slope. Cross hybrid DRA provided a wide phase range of 520° with 0.77 dB loss and 10% bandwidth of 160 MHz.

Design of a K-band reflectarray antenna using double square ring elements

2011 ◽  
Vol 54 (2) ◽  
pp. 394-398 ◽  
Author(s):  
Bing Ma ◽  
Mingyao Xia ◽  
Lubin Yan
Keyword(s):  
Reflectarray Antenna ◽  
Ring Elements ◽  
K Band

Dose-Response Aggregometry in Maternal/Neonatal Platelets

1988 ◽  
Vol 60 (02) ◽  
pp. 314-318 ◽  
Author(s):  
A M A Gader ◽  
H Bahakim ◽  
F A Jabbar ◽  
A L Lambourne ◽  
T H Gaafar ◽  
...  
Keyword(s):  
Arachidonic Acid ◽  
Dose Response ◽  
Lag Phase ◽  
Phase Slope ◽  
Multiple Doses ◽  
Nonpregnant Adult ◽  
Aggregation Of Platelets

SummaryThe aggregation of platelets collected from maternal/neonatal pairs (n = 240) at the time of childbirth, was studied in response to multiple doses of ADP, collagen, arachidonic acid and ristocetin. Similar responses were obtained from healthy nonpregnant adult controls for comparison. The lag phase, slope of the aggregation curves as well as maximum aggregation (MA%) were recorded and analysed. Neonatal and adult platelets exhibited more enhanced responses to decreasing doses of ADP, arachidonic acid and ristocetin, than maternal platelets. These enhanced responses were exhibited more consistantly in the slopes of the aggregation curves than in MA%. Although neonatal platelets have shown longer lag phase in their responses to collagen, the rate of the aggregation reaction was significantly faster than maternal platelets, with no differences in MA%. These results contradict many previous reports suggesting impaired aggregation responses of neonatal platelets to these agonist. The possible reasons for these contradictions were discussed.

EBG Based Compact Design of Dual Band UWB MIMO Antenna Operating in Ku/K Band

2020 ◽  
Vol 10 (4) ◽  
pp. 268
Author(s):  
Subuh Pramono ◽  
Muhammad Hamka Ibrahim ◽  
Josaphat Tetuko Sri Sumantyo
Keyword(s):  
Dual Band ◽  
Mimo Antenna ◽  
Compact Design ◽  
K Band

K-band SS/TDMA in Japanese satellite communication system

1982 ◽  
Author(s):  
S. OKASAKA ◽  
M. NAKAMURA ◽  
T. TANAKA ◽  
T. TAKEUCHI ◽  
H. KOMAGATA
Keyword(s):  
Communication System ◽  
Satellite Communication ◽  
Satellite Communication System ◽  
K Band
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