Low phase-noise sapphire crystal microwave oscillators: current status
This work demonstrates that ultra-low phase-noise oscillators with a single-sideband phase-
noise spectral density approaching-160 dBc/Hz at Fourier frequency of 1 kHz can be …
noise spectral density approaching-160 dBc/Hz at Fourier frequency of 1 kHz can be …
Whispering gallery mode resonators in microwave physics and technologies
A Barannik, N Cherpak, A Kirichenko… - International Journal of …, 2017 - cambridge.org
We review the main results of the development of whispering gallery mode (WGM)
resonators and their unique applications due to their quasi-optical functionality. Several …
resonators and their unique applications due to their quasi-optical functionality. Several …
Low phase-noise microwave oscillators with interferometric signal processing
Phase-noise spectral density of a 9-GHz oscillator has been reduced to-160 dBc/Hz at 1-kHz
offset frequency, which is the lowest phase noise ever measured at microwave frequencies …
offset frequency, which is the lowest phase noise ever measured at microwave frequencies …
Proposal for a new test of the time independence of the fine structure constant α using orthogonally polarized whispering gallery modes in a single sapphire resonator
ME Tobar, JG Hartnett - Physical Review D, 2003 - APS
A new experiment to test for the time independence of the fine structure constant α is
proposed. The experiment utilizes orthogonally polarized transverse electric and transverse …
proposed. The experiment utilizes orthogonally polarized transverse electric and transverse …
New method to build a high stability sapphire oscillator from the temperature compensation of the difference frequency between modes of orthogonal polarization
A new method to construct a high stability sapphire oscillator is presented. The method
relies on the anisotropic fractional temperature coefficients of frequency (TCF) of …
relies on the anisotropic fractional temperature coefficients of frequency (TCF) of …
On the flicker noise of ferrite circulators for ultra-stable oscillators
E Rubiola, Y Gruson, V Giordano - ieee transactions on …, 2004 - ieeexplore.ieee.org
The flicker noise of the ferrite circulator is a critical element in ultra-stable microwave
oscillators, in which the signal reflected from the input of the reference cavity is exploited to …
oscillators, in which the signal reflected from the input of the reference cavity is exploited to …
Second generation 50 K dual-mode sapphire oscillator
JD Anstie, JG Hartnett, ME Tobar… - IEEE transactions on …, 2006 - ieeexplore.ieee.org
Low-temperature, high-precision sapphire resonators exhibit a turning point in mode
frequency-temperature dependence at around 10 K. This, along with sapphire's extremely …
frequency-temperature dependence at around 10 K. This, along with sapphire's extremely …
The dual-mode frequency-locked technique for the characterization of the temperature coefficient of permittivity of anisotropic materials
ME Tobar, GL Hamilton, JG Hartnett… - Measurement …, 2003 - iopscience.iop.org
In this work we present a new method for obtaining accurate characterization of the
temperature coefficient of permittivity (TCP) of an anisotropic crystal, which we call the dual …
temperature coefficient of permittivity (TCP) of an anisotropic crystal, which we call the dual …
Room temperature dual-mode oscillator-first results
A frequency stability analysis of a room temperature frequency-temperature compensated
dual-mode resonator oscillator (patent pending) is presented. Using a single crystal …
dual-mode resonator oscillator (patent pending) is presented. Using a single crystal …
Temperature compensation of the difference frequency between modes of orthogonal polarization in anisotropic dielectric resonators
A new method to construct frequency-temperature compensated oscillators based on
anisotropic dielectric resonators is presented. The method relies on the anisotropic fractional …
anisotropic dielectric resonators is presented. The method relies on the anisotropic fractional …