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A 90° Oversized Broadband TE01-to-TM11 Mode Converter for High-Power Transmission Line.
- Source :
-
IEEE Transactions on Microwave Theory & Techniques . Dec2019, Vol. 67 Issue 12, p4692-4699. 8p. - Publication Year :
- 2019
-
Abstract
- This article proposes a novel method to design a 90° oversized TE01-to-TM11 mode converter for high-power transmission line. In order to obtain a full power conversion at 90° bend angle rather than an acute angle, the mode coupling process inside the oversized circular waveguide bend is analyzed, and a phase rematching method is deduced. Based on the analysis results, a phase rematching structure, consisting of two identical circular-to-elliptical transitions and a uniform circular waveguide which can transform the phase difference from $-\pi $ /2 into $\pi $ /2, is introduced. Two mode converters with the input/output radius of 14 mm are designed at the center frequency of 34 GHz to validate the proposed method. The results show that the mode converter with a limited height has a bandwidth of 4.6 GHz, while the mode converter with a limited width has 4.3 GHz with conversion efficiency over 95%. The mode converter with a limited height is manufactured and measured, and the high-purity outputs are validated by the obtained radiation field patterns at the output port of the mode converter from 32 to 36 GHz. The proposed mode converter provides a new approach for developing a compact, high-efficiency, and broadband high-power millimeter-wave transmission line. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189480
- Volume :
- 67
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Microwave Theory & Techniques
- Publication Type :
- Academic Journal
- Accession number :
- 141083506
- Full Text :
- https://doi.org/10.1109/TMTT.2019.2945711