Title :
Input impedance of a coaxial line probe feeding a circular waveguide in the TM01 mode
Author :
MacPhie, R.H. ; Opie, M. ; Ries, C.R.
Author_Institution :
Dept. of Electr. Eng., Waterloo Univ., Ont., Canada
fDate :
3/1/1990 12:00:00 AM
Abstract :
By means of the conversion of complex power technique (CCPT), a formally exact full-wave solution is given for the case of a coaxial line probe fending a circular waveguide for TM01 modal excitation. The overall scattering matrix of the coaxial-line-prove-circular-waveguide system is deduced. Numerical results for the impedance as `seen´ by the coaxial line are presented and compared with experimental results obtained in the 9.0-11.5-GHz frequency range. Their agreement is reasonably good except at the lower frequencies (<10.0 GHz), where the TM01 mode in the circular guide is close to its cutoff frequency (8.14 GHz)
Keywords :
S-matrix theory; circular waveguides; coaxial cables; electric impedance; probes; waveguide theory; 9 to 11.5 GHz; SHF; TM01 modal excitation; circular waveguide; coaxial line probe; conversion of complex power technique; full-wave solution; input impedance; scattering matrix; waveguide feed; Capacitance; Coaxial components; Frequency; Impedance; Modal analysis; Probes; Scattering; Transmission line discontinuities; Transmission line matrix methods; Waveguide junctions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
