IEEE Potentials 02/2006; 25(1):30- 35.
ABSTRACT: An analysis of the cascaded sections of a number of slot-coupled T
junctions between rectangular and circular waveguides is presented,
taking into account the mutual interactions of all possible modes
generated by the discontinuities as well as the effect of wall
thickness. The formulation is based on solving a set of coupled integral
equations resulting from the boundary conditions at the two interfaces
of the waveguide sections representing the coupling slots. The integral
equations are transformed into sets of matrix equations using the moment
method with entire basis and testing functions. Numerical results on
input VSWR (voltage standing wave ratio) and coupling are presented for
the case of a cascaded section of two air-filled T junctions for
different frequencies and different values of interelement spacing
IEEE Transactions on Microwave Theory and Techniques 02/1991; · 1.85 Impact Factor
ABSTRACT: Presents a method of estimation of coupling of a slot coupled H-plane T-junction, in which the primary waveguide is a rectangular one and the T-arm is a circular waveguide. An equivalent network of the junction is determined from a precise formulation for the effect of wall thickness. Appropriate dyadic Green's functions in the two waveguides are used for the determination of equivalent circuit parameters by the variational method. A comparison between the theoretical and experimental results on the variation of coupling with frequency is presented.
Microwaves, Antennas and Propagation, IEE Proceedings H 01/1990;