An angular displacement sensor is designed using a corrugated substrate integrated waveguide (CSIW) cavity resonator. In the proposed cavity, instead of copper vias, one of the electric walls is made by a number of open quarter guided wavelength stubs and to make an angular displacement sensor, a rotatable copper sheet is located on the stubs. When the copper sheet rotates, the length of the stubs varies causing the shift of the resonant frequency. This relation between the variation of the rotation of the sheet and the resonant frequency shift is represented by an analytical model. According to the result of the measurement and that obtained by analytical model there is a good agreement between them, in addition the results indicate that the sensor provides an angle range of 21° and a sensitivity of 11.3 MHz/degree.

角位移传感器是使用波纹基板集成波导 (CSIW) 空腔谐振器设计的。在建议的空腔中，其中一个电气壁由许多开放的四分之一引导波长短截线制成，而不是铜通孔，并且为了制造角位移传感器，可旋转的铜片位于短截线上。当铜片旋转时，短截线的长度会发生变化，从而导致谐振频率发生偏移。片材旋转的变化与共振频移之间的这种关系由分析模型表示。根据测量结果和分析模型得到的结果，它们之间有很好的一致性，此外结果表明传感器提供了 21° 的角度范围和 11.3 MHz/度的灵敏度。