| 摘要 |
Provided is a rotation angle detecting sensor having a structure for realizing miniaturization. The sensor comprises a rotational body, an encoder structure (3) in which the width dimension of a conductor pattern is periodically changed and n 0 to 360-degree phase cycles (n is a positive number) are generated, and a sensor body (4) which has a plurality of inductance elements (C1, C2, C3, C4) and which is arranged in opposition to the encoder structure (3) with a space therebetween. The number of phase cycles of the encoder structure (3) is an integral number equal to or more than 3. The plurality of inductance elements (C1, C2, C3, C4) each have a 90-degree phase difference. Two adjacent inductance elements are arranged with a space which is at least equal to or more than a half of one phase of the encoder structure (3) therebetween.
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