Distributed diode VCO with stripline coupled output and distribu

Details Distributed diode VCO with stripline coupled output and distribu Distributed diode VCO with stripline coupled output and distribu

1983-08-31

1986-02-04

LaRoche, Eugene R.

Oscillators

Plural oscillators

331 48, 331 56, 331 96, 331107R, 331107P, 331177V, 357 13, 357 2314, 333238, 333247, H03B 700, H03B 714, H01L 2990, H01L 2968

Patent

active

045688893

ABSTRACT:
In a distributed IMPATT structure, power is coupled out through a side contact. That is, in previously proposed distributed IMPATT structures, the gain medium (the active region of the IMPATT) operates as a transmission line. The prior art has attempted to couple output power from the gain medium through an end contact, i.e., through a contact which is perpendicular to the primary direction of energy propagation (and also to the direction of maximum elongation) of the active medium. In the present invention, a sidewall contact extends in a direction which is parallel to the principal direction of propagation of the energy in the active medium. Thus, the sidewall contact plus the active region together can be considered as a single transmission line. This extended transmission line is also connected to a second distributed semiconductor element which functions as a varactor. By changing the bias voltage on this varactor, the distributed capacitance of a transmission line is changed, and this change in transmission line loading causes a change in the propagation characteristic of the transmission line.

REFERENCES:
patent: 3675161 (1972-07-01), Teramoto et al.
patent: 4150345 (1979-04-01), Goldman et al.
Swan, C. B. "Composite Avalanche Diode Structures for Increased Power Capability" IEEE Transactions on Electron Devices, vol. ED-14, No. 9, Sep. 1967, pp. 584-589.
Lineback, R. J. "New IMPATT Structure Widens Radar Vistas by Adding Power" Electronics, Dec. 15, 1983, pp. 47-48.
Curtice, W. R. et al., "Varactor-Tuneable Pulsed Avalanche-Diode Oscillator for X-Band Operation" Electronics Letters, vol. 12, No. 6, pp. 131-133, Mar. 18, '76.

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