Coaxial probe modeling in waveguides and cavities

Coaxial to waveguide transitions and device under test characterization by means of inverse techniques

“…for the phase when comparing with the three cavities method in the frequency range under study. S 12 S 21 product has been included in this work in order to be able to compare our results to the three cavities technique described in [1]. S 12 S 21 provides better results as an absolute average error of 0.0017 has been obtained for the magnitude and 0.1034 rad.…”

“…To overcome these drawbacks some characterization methods based on S-parameter measurements have been presented, specifically focused on coaxial probe modeling in waveguides and cavities. One of the most important contributions of probe-excited waveguide problem was presented in [1], where a rigorous method to obtain the 2-port scattering matrix of a probe-excited semiinfinite waveguide is shown. This procedure, known as the three cavities moment method, uses three cavities and their input reflection coefficients for obtaining three linear equations.…”

“…Coaxial to waveguide transitions have been widely analyzed [1][2][3][4] since they are used in a multitude of microwave applications: multiplexers, diplexers, power dividers, and transitions (which can also be viewed as a particular case of T-junctions). If the scattering parameters of the employed transitions are known they can be removed from vector network analyzer (VNA) measurements by the so-called de-embedding process [5][6].…”

Analysis of Radiation Characteristics of a Probe-Excited Rectangular Ring Antenna by the Dyadic Green's Function Approach

“…In addition, the position of an excited probe that involves the modal distribution is comprised. Theoretically, there are many techniques to analyze the radiation from the aperture fed by probe in open literature [15][16][17][18][19][20][21][22][23]. Each method possesses its advantages and disadvantages.…”

“…Each method possesses its advantages and disadvantages. In this paper, the dyadic Green's function approach [22][23][24][25][26][27][28][29][30] is used to analyze the radiation characteristics of the proposed antenna since it is straightforward, and the closed form with physical insight is obtained. The rigorous analysis is expressed in detail.…”