Mutual coupling and radiation pattern of vivaldi antenna with slit

2017 ◽  
Author(s):  
Nurhayati ◽  
Gamantyo Hendrantoro ◽  
Eko Setijadi
Keyword(s):  
Radiation Pattern ◽  
Mutual Coupling ◽  
Vivaldi Antenna

scholarly journals Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic Vivaldi Antenna for Base Station

2020 ◽  
Vol 10 (7) ◽  
pp. 2429 ◽  
Author(s):  
Li Hui Dai ◽  
Chong Tan ◽  
Yong Jin Zhou
Keyword(s):  
Radiation Pattern ◽  
Frequency Band ◽  
High Gain ◽  
Base Station ◽  
Ultra Wideband ◽  
Radiation Patterns ◽  
Low Profile ◽  
Simulation Results ◽  
Vivaldi Antenna ◽  
Good Agreement

Stable radiation pattern, high gain, and miniaturization are necessary for the ultra-wideband antennas in the 2G/3G/4G/5G base station applications. Here, an ultrawideband and miniaturized spoof plasmonic antipodal Vivaldi antenna (AVA) is proposed, which is composed of the AVA and the loaded periodic grooves. The designed operating frequency band is from 1.8 GHz to 6 GHz, and the average gain is 7.24 dBi. Furthermore, the measured results show that the radiation patterns of the plasmonic AVA are stable. The measured results are in good agreement with the simulation results.

Radiation Pattern Synthesis and Mutual Coupling Compensation in Spherical Conformal Array Antennas

2021 ◽  
Vol 36 (6) ◽  
pp. 707-717
Author(s):  
Taimur Khan ◽  
Muhammad Khattak ◽  
Adnan Tariq
Keyword(s):  
Radiation Pattern ◽  
Mutual Coupling ◽  
Surface Deformation ◽  
Spherical Shape ◽  
Least Square ◽  
Spatial Distance ◽  
Main Beam ◽  
Antenna Gain ◽  
Pattern Synthesis ◽  
Conformal Array

This paper presents a novel technique based on Hybrid Spatial Distance Reduction Algorithm (HSDRA), to compensate the effects of deformity and mutual coupling occurred due to surface change in conformal arrays. This antenna surface deformation shifts the position of null points and loss of the main beam resulting in reduced antenna gain along with substantial undesirable effects on the antenna performance. The proposed algorithm, which cumulatively incorporates the Linearly Constraint Least Square Optimization (LCLSO) and Quadratically Constraint Least Square Optimization (QCLSO) techniques, is formulated to minimize/reduce the absolute distance between the actual (simulated/measured) radiation pattern and the desired radiation pattern while keeping the direction of main beam and nulls position under control. In particular, a 4x4 conformal microstrip phased array from planar surface is deformed to prescribe spherical-shape surface with various radii of curvature, is validated. For the enhancement of Gain of the conformal array antenna, Gain Maximization Algorithm is also proposed, the simulated results of which is compared to the traditional Phase compensation technique and unconstraint least squares optimization. The analytical results for both planar and spherical deformed configurations are first evaluated in MATLAB and then validated through Computer Simulation Technology (CST).

scholarly journals Generation of OAM Radio Waves Using Circular Vivaldi Antenna Array

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Changjiang Deng ◽  
Wenhua Chen ◽  
Zhijun Zhang ◽  
Yue Li ◽  
Zhenghe Feng
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Hollow Cylinder ◽  
Phase Difference ◽  
Simple Solution ◽  
Mode Number ◽  
Radio Waves ◽  
Vivaldi Antenna ◽  
Successive Phase

This paper gives a feasible and simple solution of generating OAM-carrying radio beams. Eight Vivaldi antenna elements connect sequentially and fold into a hollow cylinder. The circular Vivaldi antenna array is fed with unit amplitude but with a successive phase difference from element to element. By changing the phase difference at the steps of 0, ±45°, ±90°, ±135°, and 180°, the OAM radio beam can be generated with mode numbers 0, ±1, ±2, ±3, and 4. Simulations show that the OAM states of ±2 and ±3 are the same as the traditional states, while the OAM states of 0, ±1, and 4 differ at the boresight. This phenomenon can be explained by the radiation pattern difference between Vivaldi antenna and tripole antenna. A solution of distinguishing OAM states is also proposed. The mode number of OAM can be distinguished with only 2 receivers.

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