Microwave oscillator and low-noise converter using the same

Details Microwave oscillator and low-noise converter using the same Microwave oscillator and low-noise converter using the same

2006-01-17

2006-01-17

Nguyen, Lee (Department: 2682)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C331S1170FE

Reexamination Certificate

active

06987960

ABSTRACT:
A microwave oscillator for inducing parallel feedback from collector to base and obtaining a stabilized oscillation output is realized by connecting MSL A with released end to a base terminal of a transistor, connecting MSL B to its collector terminal, and disposing a DR closely to the MSL A and B to couple them electromagnetically. The length between the released end and the position of MSL A which is closest to the center of DR is set to λg1/4 (λg1 is the guide wavelength in the MSL A), and HIL is merely connected to this position as a bias supply line to the base terminal. This structure does not require the choke circuits which occupied a relatively wide area on the conventional circuit board, and a small and stable microwave oscillator having excellent phase noise characteristics, and a low-noise converter for receiving satellite signal by using the same are realized.

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Mizan, M., “An X-Band, 2.5 Watt Continous Wave Dielectric Resonator Oscillator For Future Military Systems”,IEEE Proceedings of the Frequency Control Symposium, pp. 409-414 (May 1992.
Lohninger, G. “Fundamentals of Oscillators for the Mirowave Range (Part 2)”,IEEE Signal Processing Society, vol. 6, No. 7, pp. 32-34 (Jul. 1999).
European Search Report corresponding to application No. EP 01 10 8601 dated Jul. 8, 2002.

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