Abstract
The reliability of phased array antenna can be improved with the self-repairing technology, and the existing self-repair method based on the TR module reconfiguration has problems such as slow calculation speed and difficulty in calculating the elements' mutual coupling, which is difficult to meet the application requirements. In this paper, a novel phased array antenna structure with self-repair ability is proposed. Based on the embryological electronics (embryonics), a novel phased array antenna structure with TR cell as the basic unit is constructed. The faulty TR cell can be detected and removed, and its influence on the phased array antenna's performance can be eliminated. The function and connection of faulty TR cell can be implemented by the normal TR cells and idle TR cells, the performance of phased array antenna can be repaired in real-time. TR cell, TR cell array and input/output switching control module are designed. The simulation tests show that, the phased array antenna with various fault conditions can be repaired in real-time based on the proposed structure, and the performance of phased array antenna can be repaired to the initial normal state with enough idle TR cells in array. Even without the idle TR cell, the performance of phased array antenna with fault can be improved through the self-repair. A new way for the design of phased array antenna design with self-repair ability is provided.
Highlights
Phased array antenna is widely used in modern radar equipment due to its high power, high gain, and fast beam scanning
PHASED ARRAY ANTENNA’S BASIC STRUCTURE AND SELF-REPAIR A typical phased array antenna structure is given in FIGURE 1, which is composed of element array, TR module array, beam control system, and power distribution/addition network [11], [42]
EMBRYONICS The embryological electronics is a bionic hardware structure with self-detection and self-repair ability, and it is composed of electronic cells with the same structure, which is illustrated in FIGURE 2 [43]
Summary
Phased array antenna is widely used in modern radar equipment due to its high power, high gain, and fast beam scanning. The repair control circuit in the novel phased array antenna is researched, and the proposed self-repair structure provides a new method for the phased array antenna’s design. A. PHASED ARRAY ANTENNA’S BASIC STRUCTURE AND SELF-REPAIR A typical phased array antenna structure is given in FIGURE 1, which is composed of element array, TR module array, beam control system, and power distribution/addition network [11], [42]. In the existing phased array antenna self-repair study, the normal element’s excitation is modified through adjusting the control code of phase shifter and attenuator in TR module. Aiming at the normal beam pattern, the control code of normal TR modules’ phase shifter and attenuator is calculated through the group intelligence algorithm, iterative FFT and matrix beam method Those optimization-based algorithms are time-consuming due to blind-search features, which perform heuristic operators that improve solutions iteration-by-iteration. EMBRYONICS The embryological electronics (embryonics) is a bionic hardware structure with self-detection and self-repair ability, and it is composed of electronic cells with the same structure, which is illustrated in FIGURE 2 [43]
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