Design and Simulation of an L-band Ferrite Waveguide Circulator for Industrial Applications
- Authors
- Aranganadin, Kaviya; Hsu, Hua-Yi; Lin, Ming-Chieh
- Issue Date
- Apr-2023
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- 915 MHz; broad bandwidth; L-band waveguide circulator
- Citation
- 2023 24th International Vacuum Electronics Conference, IVEC 2023, pp.1 - 2
- Indexed
- SCOPUS
- Journal Title
- 2023 24th International Vacuum Electronics Conference, IVEC 2023
- Start Page
- 1
- End Page
- 2
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189020
- DOI
- 10.1109/IVEC56627.2023.10157134
- Abstract
- Commercial L-band circulator (WR975) at 896 ± 10MHz is available on markets. However, for a wider bandwidth ( 30 MHz) application, we would need two units operated in dual frequencies between 896 MHz and 915 MHz to cover the frequency range required. A Finite Element Method (FEM) simulation study found that a broader bandwidth can be achieved by reducing the height of the waveguide circulator in half. This also leads to a reduction in overall fabrication cost. This paper discusses a detailed design and modelling of the L-band circulator operating at 915 MHz with a wide bandwidth of 55 MHz (895MZ to 950 MHz), an insertion loss of 0.195 dB for the entire bandwidth, and 0.173 dB at 915 MHz for a uniform applied bias field. The average transmission efficiency within the bandwidth is > 95.59% in the operating region, which reduces power reflections for improving the performance and reliability of magnetrons. This paper also discusses a realist magnetic circuit design for the proposed model to simulate a non-uniform applied bias for more accurate simulation results.
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