Developing MEMS Electric Current Sensors for End-use Monitoring of Power Supply: Part X — An IEEE802.11g Protocol Compliant Integratable Dual-frequency Coaxial Microstrip Antenna

In our initial work of DTIP, a passive DC MEMS current sensor was proposed for single-wire or dual-wire current detection (DTIP2011, DTIP2012). A new type of oscillating MEMS DC current sensor, composed of an excitation element and a sensing element, was further proposed in DTIP2013. Since then, a series of studies, such as cantilever-based magnetic field sensor device (DTIP2014), corresponding relation between polarization and output voltage (DTIP2015), corresponding relationship between sensitivity and magnetic inductance (DTIP2017), magnetic field distribution surrounding three-phase four-wire appliances (DTIP2018), segmentation design and empirical analysis of piezoeletric layers (DTIP2018), as well as threshold-triggered current sensing (DTIP2019), have been carried out from different aspects. This work however, is oriented to realize an IEEE802.11g protocol compliant integratable dual-frequency coaxial microstrip antenna for wireless sensor networks. The newly designed antenna can be operated under two frequency bands of 2.45GHz and 5.2GHz, meeting the new physical layer standard IEEE802.11g emerged in recent years. A wireless cantilever current sensor (WCCS) is conceptualized to be an integration of a magnetic cantilever for sensing currents and a dual-frequency coaxial microstrip antenna for transmitting signals.