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- Title
Design and Implementation of C-Band Large-Power Planar Butler Matrix in SRS.
- Authors
Li, Jinfeng; Yan, Liping; Liu, Changjun; Bai, He; Cui, Wanzhao
- Abstract
In satellite remote sensing (SRS), there is a demand for large-power microwave components. A Butler matrix is essential to a transmitting antenna array in SRS. This article illustrates the electrical and mechanical design, simulation, and test results of a large-power planar beamforming network for SRS at C-band. It is a 4 × 4 Butler matrix based on square coaxial lines. Short-ended stubs are used in the Butler matrix to broaden its bandwidth by 10%, support inner conductors, and enhance heat transfer in vacuum environments. The simulation results are consistent with the measured results. The reflection coefficient is less than −18 dB, and the isolation is more than 23 dB from 3.8 GHz to 4.2 GHz. The insertion losses are less than 0.6 dB, and the phase errors are better than ±6°. The measured peak microwave power of the proposed Butler matrix is 9 kW. Its size is 440 × 400 × 40 mm3. The proposed Butler matrix beamforming network can be applied to SRS systems.
- Subjects
TRANSMITTING antennas; REFLECTANCE; INSERTION loss (Telecommunication); COAXIAL cables; ANTENNA arrays; MATRICES (Mathematics)
- Publication
Sensors (14248220), 2024, Vol 24, Issue 7, p2132
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s24072132