scholarly journals A Compact Single-Layer Balanced Phase Shifter With Wide Bandwidth and Uniform Reference Line

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 41530-41536
Author(s):  
Wei Zhang ◽  
Kai Xu ◽  
Jin Shi ◽  
Zhidan Shen
Keyword(s):  
Phase Shifter ◽  
Single Layer ◽  
Reference Line ◽  
Wide Bandwidth

scholarly journals The Simulation Design of Microwave Absorption Performance for the Multi-Layered Carbon-Based Nanocomposites Using Intelligent Optimization Algorithm

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1951
Author(s):  
Danfeng Zhang ◽  
Congai Han ◽  
Haiyan Zhang ◽  
Bi Zeng ◽  
Yun Zheng ◽  
...  
Keyword(s):  
Layer Structure ◽  
Optimal Solution ◽  
Single Layer ◽  
Simulation Design ◽  
Wide Bandwidth ◽  
Abc Algorithm ◽  
Bee Colony ◽  
Absorbing Material ◽  
Important Means ◽  
Carbon Based

The optimal design objectives of the microwave absorbing (MA) materials are high absorption, wide bandwidth, light weight and thin thickness. However, it is difficult for single-layer MA materials to meet all of these requirements. Constructing multi-layer structure absorbing coating is an important means to improve performance of MA materials. The carbon-based nanocomposites are excellent MA materials. In this paper, genetic algorithm (GA) and artificial bee colony algorithm (ABC) are used to optimize the design of multi-layer materials. We selected ten kinds of materials to construct the multi-layer absorbing material and optimize the performance. Two algorithms were applied to optimize the two-layer MA material with a total thickness of 3 mm, and it was found that the optimal bandwidth was 8.12 GHz and reflectivity was −53.4 dB. When three layers of MA material with the same thickness are optimized, the ultra-wide bandwidth was 10.6 GHz and ultra-high reflectivity was −84.86 dB. The bandwidth and reflectivity of the optimized material are better than the single-layer material without optimization. Comparing the GA and the ABC algorithm, the ABC algorithm can obtain the optimal solution in the shortest time and highest efficiency. At present, no such results have been reported.

scholarly journals A MODIFIED COUPLED-LINE SCHIFFMAN PHASE SHIFTER WITH SHORT REFERENCE LINE

2014 ◽  
Vol 54 ◽  
pp. 17-27 ◽  
Author(s):  
Weiwei Zhang ◽  
Yuanan Liu ◽  
Yongle Wu ◽  
Weimin Wang ◽  
Ming Su ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Reference Line ◽  
Coupled Line

scholarly journals Ultra-wide bandwidth photonic microwave phase shifter with amplitude control function

2017 ◽  
Vol 25 (3) ◽  
pp. 2883 ◽  
Author(s):  
Xudong Wang ◽  
Jinglan Zhang ◽  
Erwin H. W. Chan ◽  
Xinhuan Feng ◽  
Bai-ou Guan
Keyword(s):  
Phase Shifter ◽  
Control Function ◽  
Wide Bandwidth ◽  
Amplitude Control ◽  
Microwave Phase Shifter

Wideband Single-Layer 90$^{\circ}$ Phase Shifter Using Stepped Impedance Open Stub and Coupled-Line With Weak Coupling

2014 ◽  
Vol 24 (3) ◽  
pp. 176-178 ◽  
Author(s):  
Qiang Liu ◽  
Yuanan Liu ◽  
Junyu Shen ◽  
Shulan Li ◽  
Cuiping Yu ◽  
...  
Keyword(s):  
Weak Coupling ◽  
Phase Shifter ◽  
Single Layer ◽  
Coupled Line

scholarly journals Simplified Printed Log-Periodic Dipole Array Antenna Fed by CBCPW

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Guohua Zhai ◽  
Yong Cheng ◽  
Qiuyan Yin ◽  
Shouzheng Zhu ◽  
Jianjun Gao
Keyword(s):  
Coplanar Waveguide ◽  
Single Layer ◽  
Measured Data ◽  
Simple Approach ◽  
Geometric Features ◽  
Wide Bandwidth ◽  
Broad Bandwidth ◽  
Low Profile ◽  
Low Insertion Loss ◽  
Good Agreement

A novel simple approach for designing single-layer printed log-periodic dipole array (PLPDA) antenna fed by conductor-backed coplanar waveguide (CBCPW) is presented. The PLPDA antenna has the merits of wide bandwidth, low profile, and stable radiation pattern, which should be fed by the balanced line. The balanced line, created by the geometric features of the CBCPW, provides a balun with a considerably wide bandwidth with low profile, broad bandwidth, low insertion loss, and so forth. The prototype of the proposed CBCPW-fed printed log-periodic array at Ka band is designed and fabricated; the measured data are in good agreement with the simulated results.

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