The design and analysis of a Ka-band coaxial to waveguide transition

• Published in: IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36 Vol. 1; pp. 524 - 527 vol.1
• Main Authors: Heejin Kang, Piljun Park, Jaehoon Choi, Kyungwan Yu, Jin-Dae Kim
• Format: Conference Proceeding
• Language: English
• Published: IEEE 1998
• Subjects: Analytical models; Coaxial components; Finite difference methods; Microwave theory and techniques; Payloads; Satellites; Signal analysis; Signal design; Waveguide components; Waveguide transitions
• ISBN: 9780780344785; 0780344782
• DOI: 10.1109/APS.1998.699193

The main objective of this paper is to design and analyze a Ka-band coaxial to waveguide transition which is an indispensable component in a satellite payload system, providing the microwave signal transfer from coaxial to waveguide or vice verse. We analyze a Ka-band coaxial to waveguide transition based on the FDTD method used by Nabarro (see IEEE Trans. Microwave Theory Tech. vol.42, p.347-50, 1994 and IEE Proc., vol.142, no.6, p.495-7, 1995). In order to simulate a real situation and to analyze the characteristics of a transition accurately, a coaxial cable is modeled by cylindrical cells, a rectangular waveguide is modeled by rectangular cells, and the connecting part between two structures are analyzed using the interpolation scheme which is based on the first order Taylor series approximation and coordinate transformation. The s-parameters and input impedances of a transition using the present approach are compared with those of HFSS and measurement.