Compact and Broadband CPW-to-RWG Transition Using 180° Phase Shifter.

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Bibliographic Details
Title:	Compact and Broadband CPW-to-RWG Transition Using 180° Phase Shifter.
Authors:	Cheng, Yueh-Hsien¹, Ko, Chun-An¹, Lin, Yi-Chih¹, Wang, Chun-Long¹ clw@mail.ntust.edu.tw
Source:	Progress in Electromagnetics Research C. 2026, Vol. 164, p51-57. 7p.
Subjects:	Phase shifters, Coplanar waveguides, Electric impedance, Broadband communication systems, Rectangular waveguides, Reflectance, Electronic equipment
Abstract:	In this paper, a compact and broadband 50-Ω coplanar waveguide-to-rectangular waveguide (CPW-to-RWG) transition using a 180◦ phase shifter is proposed. The frequency range, for which the reflection coefficient is smaller than −15 dB, covers the whole Xband (8.2 ∼ 12.4 GHz). In addition to the broadband performance, the transition occupies a small length of 7.37 mm. Furthermore, the characteristic impedance of the coplanar waveguide is 50 Ω, which conforms to the commonly used 50 Ω impedance of radio frequency systems. To further reduce the circuit size, a compact and broadband 50-Ω CPW-to-RWG transition using an inductance-compensated 180◦ phase shifter is proposed. The frequency range, for which the reflection coefficient is smaller than −15 dB, also covers the whole X-band (8.2 ∼ 12.4 GHz). Besides, the transition size is reduced from 7.37 mm to 6.55 mm, which is smaller than a quarter-wavelength. Furthermore, the characteristic impedance of the coplanar waveguide is of the nominal value of 50 Ω. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	In this paper, a compact and broadband 50-Ω coplanar waveguide-to-rectangular waveguide (CPW-to-RWG) transition using a 180◦ phase shifter is proposed. The frequency range, for which the reflection coefficient is smaller than −15 dB, covers the whole Xband (8.2 ∼ 12.4 GHz). In addition to the broadband performance, the transition occupies a small length of 7.37 mm. Furthermore, the characteristic impedance of the coplanar waveguide is 50 Ω, which conforms to the commonly used 50 Ω impedance of radio frequency systems. To further reduce the circuit size, a compact and broadband 50-Ω CPW-to-RWG transition using an inductance-compensated 180◦ phase shifter is proposed. The frequency range, for which the reflection coefficient is smaller than −15 dB, also covers the whole X-band (8.2 ∼ 12.4 GHz). Besides, the transition size is reduced from 7.37 mm to 6.55 mm, which is smaller than a quarter-wavelength. Furthermore, the characteristic impedance of the coplanar waveguide is of the nominal value of 50 Ω. [ABSTRACT FROM AUTHOR]
ISSN:	19378718
DOI:	10.2528/PIERC25092403