Broad-band coaxial directional couplers for high-power applications
IEEE transactions on microwave theory and techniques, 2003•ieeexplore.ieee.org
A new class of coaxial broad-band directional couplers for high-power RF testing is
presented. These devices overcome the drawbacks of classical stripline and coaxial
couplers, and allow simple low-cost mechanical construction. A design technique for the
new longitudinally nonuniform transversally nonsymmetrical couplers is described,
providing the synthesis of any coupling shape versus frequency. As a first demonstration of
the proposed method, a set of broad-band (2-7.5 GHz) low-coupling (-30,-33,-35 dB) …
presented. These devices overcome the drawbacks of classical stripline and coaxial
couplers, and allow simple low-cost mechanical construction. A design technique for the
new longitudinally nonuniform transversally nonsymmetrical couplers is described,
providing the synthesis of any coupling shape versus frequency. As a first demonstration of
the proposed method, a set of broad-band (2-7.5 GHz) low-coupling (-30,-33,-35 dB) …
A new class of coaxial broad-band directional couplers for high-power RF testing is presented. These devices overcome the drawbacks of classical stripline and coaxial couplers, and allow simple low-cost mechanical construction. A design technique for the new longitudinally nonuniform transversally nonsymmetrical couplers is described, providing the synthesis of any coupling shape versus frequency. As a first demonstration of the proposed method, a set of broad-band (2-7.5 GHz) low-coupling (-30, -33, -35 dB) nonsymmetrical coaxial directional couplers in air has been designed, built, and characterized, showing very good agreement between predicted and obtained performances.
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