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Publications Influence

Spatial variations of field polarization and phase in microwave cavities: application to the cesium fountain cavity

- A. Khursheed, G. Vecchi, A. De Marchi
- Physics
- IEEE Transactions on Ultrasonics, Ferroelectrics…
- 1 March 1996

Wall losses in microwave cavities will generate a phase difference between the components of the field, and give rise to spatial phase variations which are related to the geometry of complicated… Expand

23 3

Square wave frequency modulation as a mean to reduce the effect of local oscillator instabilities in alkali vapor passive frequency standards

- A. De Marchi, L. Lo Presti, G. Rovera
- Physics
- Proceedings of the IEEE International Frequency…
- 27 May 1998

A quick review is given of mechanisms that can transfer local oscillator instabilities onto the output frequency of an atomic frequency standard, with the possible result of representing a limitation… Expand

3 2

Effects of Servo Loop Modulation in Atomic Beam Frequency Standards Employing a Ramsey Cavity

- A. De Marchi, G. Rovera, A. Premoli
- Physics, Medicine
- IEEE Transactions on Ultrasonics, Ferroelectrics…
- 1987

Some kind of modulation needs to be imposed on the mi- crowave signal to acquire lock in all passive atomic frequency stan- dards. In this way a frequency-discriminating dc signal is obtained by… Expand

31 1

Virtues and problems of the high C-field Cs beam frequency standard

- G. Costanzo, M. Siccardi, V. Barychev, A. De Marchi
- Physics, Medicine
- IEEE Transactions on Ultrasonics, Ferroelectrics…
- 2000

The high C-field Cs beam frequency standard is presently a working machine that is undergoing first evaluations. The projected 10/sup -14/ accuracy goal is as yet unattained, mainly because of… Expand

4 1- PDF

A simple analysis of the Dick effect in terms of phase noise spectral densities

- L. Lo Presti, D. Rovera, A. De Marchi
- Physics, Medicine
- IEEE Transactions on Ultrasonics, Ferroelectrics…
- 1998

In cold-atom frequency standards based on the Ramsey double interaction method, the phase noise of the interrogating signal appears as a random "end-to-end phase difference", thereby introducing… Expand

16

The elusive half-pole in the frequency domain transfer function of Peltier thermoelectric devices.

- A. De Marchi, Valter Giaretto
- Physics, Medicine
- The Review of scientific instruments
- 10 March 2011

A half-pole can be expected in the transfer function of a Peltier device because proportionality between the diffusion length and the square root of the diffusion time is intrinsic in the diffusion… Expand

17- PDF

An accurate new method to measure the dimensionless figure of merit of thermoelectric devices based on the complex impedance porcupine diagram.

- A. De Marchi, Valter Giaretto
- Medicine, Physics
- The Review of scientific instruments
- 28 October 2011

The heat diffusion related f(-1/2) slow decay in the frequency domain transfer function of thermoelectric devices introduces a bias in figure of merit measurement methods that do not take it into… Expand

32- PDF

Spectral Analysis of Synthesized Signals in the mm Wavelength Region

- E. Bava, A. De Marchi, A. Godone
- Physics
- IEEE Transactions on Instrumentation and…
- 1 June 1977

In this paper some experimental results on the spectral purity along a multiplier chain from 5 MHz up to 600 GHz are reported. The measured points are compared to the numerical data which can be… Expand

15

Frequency stability of cell-based passive frequency standards: reducing the effects of local-oscillator PM noise

- J.Q. Deng, A. De Marchi, F. Walls, R. Drullinger
- Physics
- Proceedings of the IEEE International Frequency…
- 27 May 1998

Experimental measurements in our present diode-laser-pumped Rb buffer-gas-cell frequency standard show that the sensitivity to microwave PM noise is approximately a factor of 10 lower when… Expand

7

Phase-coherent synthesis and precision frequency measurements in the far infrared

- A. De Marchi, A. Godone, E. Bava
- Physics
- IEEE Transactions on Instrumentation and…
- 1 June 1981

A short review of the basic concepts and problems in frequency multiplication into the infrared region of the electromagnetic spectrum is given. Results obtained with a multiplier chain starting from… Expand

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