Patent ID: 7456631

Claim:
An NMR probe comprising: a resonant circuit resonating with first RF waves, the resonant circuit including a sample coil having a first and a second ends, a first transmission line having a first end and a second end grounded, and a second transmission line having a first end and a second end grounded, the sample coil being made of a conductor, the first end of the first transmission line being connected with the first end of the sample coil, the first end of the second transmission line being connected with the second end of the sample coil; a first connector for entering and extracting the first RF waves; and a first matching circuit connected between the first connector and the resonant circuit; wherein the total transmission line length of the conductor of the sample coil, the first transmission line, and the second transmission line is set to a value at which standing waves given by λ+(n−1)×λ/2 are produced, where % is the wavelength of the first RF waves applied to the resonant circuit and n is a positive integer; and wherein the sample coil is placed at a position where the strength of a produced magnetic field is maximized.