Null Placement in Time-Modulated Linear Antenna Arrays of Dipole Element

2017 ◽  
Vol 63 (3) ◽  
pp. 403-412 ◽  
Author(s):  
Gopi Ram ◽  
Durbadal Mandal ◽  
Sakti Prasad Ghoshal ◽  
Rajib Kar
Keyword(s):  
Antenna Arrays ◽  
Linear Antenna ◽  
Null Placement ◽  
Linear Antenna Arrays

Collective-Animal-Behaviour-Based Optimized Null Placement in Time-Modulated Linear Antenna Arrays

2017 ◽  
pp. 115-132
Author(s):  
Gopi Ram ◽  
Rajib Kar ◽  
Durbadal Mandal ◽  
Sakti Prasad Ghoshal
Keyword(s):  
Antenna Arrays ◽  
Excitation Amplitude ◽  
Animal Behaviour ◽  
Optimal Placement ◽  
Linear Antenna ◽  
Rf Switch ◽  
Optimal Current ◽  
Null Placement ◽  
Linear Antenna Arrays ◽  
Collective Animal Behaviour

In this paper optimal design of time modulated linear antenna arrays (TMLAA) with optimal placement of nulls in the desired direction of elevation plane has been dealt with the approach based on evolutionary algorithm like collective animal behaviour (CAB). Analysis has been done in theoretical and practical environment. Firstly the current excitation weights of the linear array of isotropic elements have been optimized by CAB is applied to improve null performance of TMLAA by Radio Frequency (RF) switch in MATLAB environment. The nulls positions of a TMLAA can be reduced significantly by optimizing the static excitation amplitudes and proper design of switch-on time intervals of each element. The CAB adjusts the current excitation amplitude of each element to place deeper nulls in the desired directions. Secondly the obtained optimal current excitation weight of the array factor is practically implemented in computer simulation technology- microwave studio (CST- MWS) environment. The array of microstrip patch antenna has been designed to operate at 5.85 GHz.

SYNTHESIS OF SIMULTANEOUS MULTIPLE-HARMONIC-PATTERNS IN TIME-MODULATED LINEAR ANTENNA ARRAYS

2014 ◽  
Vol 34 ◽  
pp. 135-142 ◽  
Author(s):  
Sujit Kumar Mandal ◽  
Gautam Kumar Mahanti ◽  
Rowdra Ghatak
Keyword(s):  
Antenna Arrays ◽  
Linear Antenna ◽  
Linear Antenna Arrays

Tens of Gigabits Wireless Communications Over E-Band LoS MIMO Channels With Uniform Linear Antenna Arrays

2014 ◽  
Vol 13 (7) ◽  
pp. 3791-3805 ◽  
Author(s):  
Peng Wang ◽  
Yonghui Li ◽  
Xiaojun Yuan ◽  
Lingyang Song ◽  
Branka Vucetic
Keyword(s):  
Wireless Communications ◽  
Antenna Arrays ◽  
Linear Antenna ◽  
Mimo Channels ◽  
Linear Antenna Arrays

scholarly journals The optimal synthesis of scanned linear antenna arrays

2020 ◽  
Vol 10 (2) ◽  
pp. 1477
Author(s):  
Anas A. Amaireh ◽  
Asem S. Al-Zoubi ◽  
Nihad I. Dib
Keyword(s):  
Antenna Arrays ◽  
Firefly Algorithm ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Linear Antenna ◽  
Symbiotic Organisms Search ◽  
Optimization Parameters ◽  
Antlion Optimization ◽  
Symbiotic Organisms ◽  
Linear Antenna Arrays

In this paper, symmetric scanned linear antenna arrays are synthesized, in order to minimize the side lobe level of the radiation pattern. The feeding current amplitudes are considered as the optimization parameters. Newly proposed optimization algorithms are presented to achieve our target; Antlion Optimization (ALO) and a new hybrid algorithm. Three different examples are illustrated in this paper; 20, 26 and 30 elements scanned linear antenna array. The obtained results prove the effectiveness and the ability of the proposed algorithms to outperform and compete other algorithms like Symbiotic Organisms Search (SOS) and Firefly Algorithm (FA).

Sign in / Sign up

Export Citation Format

Share Document