Characterization of coupled finlines by generalized transverse resonance method

✍ Scribed by Giovanni Schiavon; Roberto Sorrentino; Piero Tognolatti

• Publisher: John Wiley and Sons
• Year: 1988
• Tongue: English
• Weight: 974 KB
• Volume: 1
• Category: Article
• ISSN: 0894-3370
• DOI: 10.1002/jnm.1660010107

✦ Synopsis

The conventional transverse resonance method, which has been widely used for the approximate characterization of a number of guiding structures and leaky wave antennas, is formulated in a generalized form. The transverse resonance viewpoint combined with the generalized matrix representation of discontinuities yields a rigorous transverse equivalent circuit of the guiding structure.

This technique is used to compute the characteristics of both symmetrical and asymmetrical double-slot unilateral finlines in terms of phase constant and characteristic impedance of the dominant as well as higherorder modes. Numerical aspects of this method are discussed.

In a double-slot finline structure, a coupled-mode regime is established with the onset of the first higherorder mode in addition to the dominant quasi-TEM mode. Symmetrical structures are simply modelled in terms of even and odd mode characteristics, but a more general coupled-line model, in terms of the C-mode and the n-mode must be applied to asymmetrical coupled finlines.