Biphase modulator with balun design

H - Electricity – 04 – L

Patent

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Details

H04L 27/20 (2006.01) H03K 7/04 (2006.01) H03M 5/12 (2006.01)

Patent

CA 2297759

A double-balanced microwave biphase modulator circuit is provided with a first balun (9) for transforming the unbalanced RF input impedance to a balanced biode impedance and providing direct current ground return paths, and a second balun (11) for transforming the balanced diode impedance to the unbalanced RF output impedance and providing access for data input (12). The first balun (9) consists of a transmission line (1) attached from a coupled pair of transmission lines (2A, 2B) to ground. The second balun (11) consists of three pairs of coupled transmission lines (4A, 4B, 5A, 5B, 6A, 6B), in which the first two pairs of transmission lines (4A, 4B, 5A, 5B) are attached to a diode ring (10), to a data input filter (7), to a circuit ground, and to the third pair of transmission lines (6A, 6B).

L'invention concerne un circuit de modulation de phase à deux états du type mélangeur hyperfréquence doublement symétrique, comprenant un premier balun (9) qui transforme l'impédance d'entrée HF non équilibrée en impédance de diode équilibrée et établit des trajets de retour par la terre en courant continu, et un second balun (11) qui transforme l'impédance de diode équilibrée en impédance de sortie HF non équilibrée et établit l'accès pour l'entrée des données (12). Le premier balun (9) consiste en une ligne de transmission (1) reliée à la terre depuis une paire de lignes de transmission couplées (2A, 2B). Le second balun (11) consiste en trois paires de lignes de transmission couplées (4A, 4B, 5A, 5B, 6A, 6B), les deux premières paires de lignes de transmission couplées (4A, 4B, 5A, 5B) étant reliées à un anneau de diodes (10), à un filtre d'entrée de données (7), à une masse de circuit, et à la troisième paire de lignes de transmission (6A, 6B).

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