Reconfigurable Antenna Array Direction Finding System Based on a Fast Search Algorithm

In a traditional antenna array direction finding system, all the antenna sensors need to work or shut down at the same time, which often leads to signal crosstalk, signal distortion, and other electromagnetic compatibility problems. In addition, the direction-finding algorithm in a traditional system needs a tremendous spectral search, which consumes considerable time. To compensate for these deficiencies, a reconfigurable antenna array direction finding system is established in this paper. This system can dynamically load part or all of the antennas through microwave switches (such as a PIN diode) and conduct a fast direction of arrival (DOA) search. First, the hardware structure of the reconfigurable antenna is constructed. Then, based on the conventional spatial domain search algorithm, an improved transform domain (TD) search algorithm is proposed. The effectiveness of the system has been proven by real experiments, and the advantage of the system has been verified by detailed simulations.

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Elevation and Azimuth Direction Finding by Two-Element Pattern Reconfigurable Antenna Array

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2021.3118820 ◽

2021 ◽

pp. 1-1

Author(s):

Ziheng Ding ◽

Jingfeng Chen ◽

Chong He ◽

Ronghong Jin

Keyword(s):

Antenna Array ◽

Direction Finding ◽

Reconfigurable Antenna ◽

Element Pattern

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Application of genetic algorithm in M × N reconfigurable antenna array based on RF MEMS switches

Modern Physics Letters B ◽

10.1142/s0217984918503657 ◽

2018 ◽

Vol 32 (30) ◽

pp. 1850365 ◽

Cited By ~ 3

Author(s):

Wenchao Tian ◽

Daowei Wu ◽

Qiang Chao ◽

Zhiqiang Chen ◽

Yongkun Wang

Keyword(s):

Genetic Algorithm ◽

Wireless Communication ◽

Resonant Frequency ◽

Antenna Array ◽

Electromagnetic Compatibility ◽

Rf Mems ◽

Reconfigurable Antenna ◽

Target Frequency ◽

Mems Switches ◽

Rf Mems Switches

With the continuous development of the wireless communication, a device needs to integrate multiple antennas, which will lead to increased volume, increased cost, electromagnetic compatibility problems and increased weight. This paper presents a [Formula: see text] reconfigurable antenna array based on RF MEMS switches. The modeling script of [Formula: see text] reconfigurable antenna array is written in MATLAB by using MATLAB-HFSS-API. In order to quickly get a switch array with target frequency, genetic algorithm is applied to [Formula: see text] reconfigurable antenna array. Taking the [Formula: see text] reconfigurable antenna array as an example, a switch array with the resonant frequency of 3.81 GHz is searched from its 4096 switch arrays. The switch array found by genetic algorithm is 1 1 0 0 1 0 0 1 1 0 1 0. The resonant frequency and S11 parameter of this switch array is 3.81 GHz and −20.96 dB. The search takes 6.77 h and the efficiency is 17 times of the simulating all switch arrays.

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