High-Spectral-Purity Microwave Oscillator: Design Using Conventional Air-Dielectric Cavity

Published

January 1, 2003

Author(s)

A Sen Gupta, David A. Howe, Craig Nelson, Archita Hati, F L. Walls, J F. Garcia nava

Abstract

We report exceptionally low PM and AM noise levels from a microwave oscillator that uses a conventional air-dielectric cavity resonator as a frequency discriminator. Our approach is to increase the discriminator's intrinsic signal-to-noise ratio by use of a high-power carrier signal to interrogate an optimally coupled cavity, while the high-level of the carrier is suppressed before the phase detector. We developed and tested an accurate model of the expected PM noise that indicates, among other things, that a conventional air-dielectric resonator of moderate Q will exhibit less discriminator noise in this approach than do more esoteric and expensive dielectric resonators tuned to a high-order, high-Q mode and driven at the dielectric's optimum power.

Proceedings Title

2003 Joint Mtg. IEEE Intl. Freq. Cont. Symp. and EFTF Conf

Conference Dates

May 4-8, 2003

Conference Location

Tampa, FL, US

Conference Title

Proc. 2003 Joint Mtg. IEEE Intl. Freq. Cont. Symp. and EFTF Conf.

Pub Type

Conferences

Download Paper

Local Download

Citation

Sen Gupta, A. , Howe, D. , Nelson, C. , Hati, A. , Walls, F. and Garcia nava, J. (2003), High-Spectral-Purity Microwave Oscillator: Design Using Conventional Air-Dielectric Cavity, 2003 Joint Mtg. IEEE Intl. Freq. Cont. Symp. and EFTF Conf , Tampa, FL, US, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105555 (Accessed October 4, 2024)