US 5,629,625 AGranted

Process for adjusting as to frequency, particularly microwave bridges, and device embodying such a process

AssigneeSadis Bruker Spectrospin, Societe Anonyme de Diffusion de l'Instrumentation Scientifique, Bruker Spectrospin (Societe Anonyme a Directive)

InventorsVictor Ringeisen, Laurent Martinache

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Abstract

A process for frequency tuning microwave bridges and a device for practicing such a process. The process is characterized in that it consists in subjecting a resonator (3) to the radiation delivered by a secondary microwave source (10) sweeping a wide band of frequencies comprising particularly the frequency (F) of radiation delivered by the principal microwave source (1). The radiation reflected by the resonator (3) is displayed and the relative positions are marked along the frequency spectrum, of the frequency (F) and of the frequency of resonance (Fr) of the resonator (3). The frequency (F) of radiation delivered by the principal microwave source (1) is varied while controlling in real time the effect of this variation on the relative positions of the frequencies (F and Fr).

Claims13

Dependent claims

Process for tuning and adjusting, as to frequency, emitter/receiver assemblies comprising microwave bridges allowing microwave radiation to be coupled to a resonator disposed in a static magnetic field and adapted to receive a sample, the process comprising:

subjecting a resonator (3) to radiation from a secondary independent microwave source (10) sweeping a band of frequencies, said band of frequencies including a frequency (F) of a radiation delivered by a principal microwave source (1), said radiation from the secondary microwave source (10) being mixed, before application to the resonator (3), with strongly attenuated radiation from the principal microwave source (1);
detecting radiation reflected by said resonator (3) and said mixed radiation;
marking relative positions in the frequency spectrum of the frequency (F) and of a resonance frequency (Fr) of said resonator (3);
varying the frequency (F) of radiation delivered by the principal microwave source (1) by controlling, in real time, the effect of this variation on the relative positions of said frequencies (F and Fr);
and subjecting at least one sample (5), and a resonator (3) assembly to the radiation delivered, in an unattenuated manner, from the principal microwave source (1) after tuning of the frequency (5) relative to the resonance frequency (Fr) of said resonator (3).

2 more elements

Device for frequency tuning an apparatus for the generation of microwave radiation and for detection and analysis of the resulting absorbed or reflected radiation, comprising a microwave bridge, an independent secondary microwave source (10) having a band of radiation frequencies, means (11, 12) to substitute, during a tuning operation, for the radiation delivered by a principal microwave source (1) of the microwave bridge, either the radiation generated by the secondary source (10), or a composite radiation formed by a mixing of radiations from the secondary microwave source (10) and the principal microwave source (1), said radiation from said principal microwave source (1) being substantially attenuated, and means (6, 7, 15) for the detection and analysis and display of the radiation reflected by the resonator (3) and of the radiation coupled to said resonator (3), so as to permit determining in relative positions of the frequency (F) of the principal source (1) and of the resonance frequency of the resonator (3), said band of radiation frequencies of said secondary microwave source including said frequency (F) of said principal source (1).

Dependencies are inferred from the claim text.