Analysis of Resonant Mode Distributions and Suppression of Undesired Modes at Strongly Coupled Oscillator Arrays

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Zia Tohidi, Tahereh | 2022

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 55145 (05)
University: Sharif University of Technolog
Department: Electrical Engineering
Advisor(s): Banai, Ali
Abstract:
Mutually coupled oscillator arrays may be used for power combining at the millimeter-wave region. In addition, these arrays have the capability of beam steering without the use of any phase shifter. Using the strong coupling method is inevitable to obtain synchronization between all elements in the large arrays. One of the challenges in strongly coupled oscillators is the multi-moding problem or oscillation at undesired frequencies. In this thesis, we obtain mode distributions in a one-dimensional and a two-dimensional array with rectangular boundary, using a method based on circuit equations in the frequency domain. Then, we compared the results with the previous works and also verified them with the time-domain simulations. Eventually, we used this method to obtain mode distributions in various sizes of two-dimensional arrays with circular boundary and rectangular, triangular, and hexagonal coupling networks. In the next step, we reviewed the method introduced for damping the undesired modes in the linear arrays and developed it for two-dimensional arrays, and then checked the accuracy of the results with the time-domain simulations
Keywords:
Oscillator Array ; Damping ; Strong Coupling ; Mode Distributions ; Undesired Modes ; Two Dimensional Array ; Circular Boundary

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