Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
184 words
An EPR spectrometer comprising a cavity for supporting a sample to be analyzed, means for providing a relatively low frequency magnetic field in the sample, a microwave energy source having a frequency for electromagnetically exciting said cavity to resonance, a coaxial line coupling said microwave source and the cavity, and means for variably coupling microwave energy from the coaxial line to the resonant portion of the cavity, said variable coupling means including: a section in a portion of said cavity, said section being dimensioned so that it is a waveguide beyond cutoff for the frequency propagating in said line, a nonferromagnetic, metallic electromagnetic radiator for the energy, said radiator being positioned in the section to electromagnetically excite the cavity with the energy, a fixedly mounted termination for said line connected to the line to be excited by the energy propagating in said line, said termination being positioned in the section to be inductively coupled with said radiator, and means for controlling the inductive coupling between the termination and the radiator to control the amount of said energy radiated by the radiator into the cavity.
Claim 2
Dependent Claim
184 words
An EPR spectrometer comprising a cavity for supporting a sample to be analyzed, means for providing a relatively low frequency magnetic field in the sample, a microwave energy source having a frequency for electromagnetically exciting said cavity to resonance, a coaxial line coupling said microwave source and the cavity, and means for variably coupling microwave energy from the coaxial line to the resonant portion of the cavity, said variable coupling means including: a section in a portion of said cavity, said section being dimensioned so that it is a waveguide beyond cutoff for the frequency propagating in said line, a nonferromagnetic, metallic electromagnetic radiator for the energy, said radiator being positioned in the section to electromagnetically excite the cavity with the energy, a fixedly mounted termination for said line connected to the line to be excited by the energy propagating in said line, said termination being positioned in the section to be inductively coupled with said radiator, and means for controlling the inductive coupling between the termination and the radiator to control the amount of said energy radiated by the radiator into the cavity.
Claim 3
Dependent Claim
20 words
The coupler of claim 1 wherein the means for controlling includes means fOr moving the radiator relative to the termination.
Claim 4
Dependent Claim
62 words
The spectrometer of claim 1 wherein the termination is a planar loop, said radiator comprising a metal stud mounted with a longitudinal axis coplanar with the loop and at right angles to the plane of magnetic flux lines inductively coupling the loop and the stud, and the means for controlling comprises means for varying the length of the stud in the section.
Claim 5
Dependent Claim
47 words
The spectrometer of claim 1 wherein the termination is a planar loop, said radiator comprising a metal disc mounted for rotation about an axis at right angles to the plane of the loop, and the means for controlling comprises means for rotating the disc about the axis.