Mixer circuit

Details Mixer circuit Mixer circuit

H - Electricity

01

Q

325/113

H01Q 23/00 (2006.01) H01Q 1/24 (2006.01) H01Q 9/28 (2006.01) H01Q 9/44 (2006.01) H03D 9/06 (2006.01) H04B 1/26 (2006.01) H03D 7/14 (2006.01)

Patent

CA 1341457

A mixer circuit (1), comprised of two planar dipoles (3, 5), mounted upon a dielectric insulator or semiconductor body. Mixer elements (M1, M2) are incorporated in the path of each dipole (3, 5), there being two such elements each fed by both dipoles. The first of these dipoles, dipole (5) is split along part of its length, this split section (23) serving as a delay-line between one of the mixer elements, element (M1), and the second dipole (3). The second dipole (3) is split along at least a part of its length and is open at one end. A connective link (29C) is provided between one of the delay-line conductors (25/11) and one of the split parts (9) of the second dipole (3). Intermodulation signal developed in the one mixer (M1;M2) can then be extracted from the split ends ( 9, 13; 7, 11) of the second dipole (3). The link (29C) is formed outside the envelope of the delay-line (23) and does not affect its broad band properties. A slowing mechanism - for example, combline interdigitated structure (31) can be included in the delay-line (23). Preferably the link (23C) runs parallel to a significant portion of the length of the second dipole (3), the latter thus modified forming a folded dipole.

453751

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