Planar multiple oscillator circuit

Details Planar multiple oscillator circuit Planar multiple oscillator circuit

1982-09-27

1984-10-30

Laroche, Eugene R.

Oscillators

Plural oscillators

Parallel connected

331107P, 331107SL, H03B 714, H03B 914

Patent

active

044802331

ABSTRACT:
At least two oscillators (20) are power combined using planar transmission lines, e.g., microstrip, stripline, or suspended substrate. A portion (42) of each oscillator (20) is preferably implemented in suspended substrate while an impedance matching portion (24) is preferably implemented in microstrip. Each oscillator (20) comprises a two-terminal negative-resistance active device power source (22) such as a negative resistance diode. The sources (22) are all operated in phase in the even mode. Stabilizing resistors (8) connect adjacent oscillators (20) to keep the sources (22) in phase. A diplexer (29, 33) within each oscillator (20) isolates the RF output (and RF input when injection locking is employed) from the individual DC biases used for sources (22), controls out-of-band impedances, and isolates oscillators (20) from each other. The outputs of the oscillators (20) are summed at a common junction (12) via planar transmission line spokes (10) having equal lengths. In the multi-oscillator embodiment, several oscillators (20) are radially symmetrically oriented around cylindrical junction (12 ).

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