Tunable microwave oscillator using magnetostatic waves
AssigneeThomson-CSF
InventorsJean-Paul Castera, Jean-Marie Dupont
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Abstract
Microwave oscillator using magnetostatic surface or bulk waves which can be transmitted in a thin layer of magnetic material having two cavity resonators with coupled gratings of different equivalent lengths in such a way that the first is multimode and the second monomode in the reflection pass band of the gratings, the cavities being arranged in such a way that the second filters the modes transmitted in the first. Microwave signals are applied to one of the two cavities and the resonated waves are collected in the second cavity.
Claims7
A microwave oscillator which can be tuned by a variation of a magnetic field, comprising:
- two coupled cavities formed in a magnetic material layer and forming a first resonator used as a multimode filter and a second resonator used as a monomode filter, respectively with the second resonator filtering one of the modes transmitted in said first resonator, an input transducer for exciting magnetostatic waves in said first cavity;
- an output transducer for an extraction of a signal corresponding to the waves transmitted in said second cavity;
- amplifier means with an input and an output respectively connected to said output transducer and said input transducer;
- and
- electromagnetic means for subjecting said two cavities to an external magnetic field.
Dependencies are inferred from the claim text.