###### Abstract  
The research on MEMS wireless sensing technology adapted to strong power frequency electromagnetic field environments is of great significance to our energy security, economic society, and even national security. Here, we propose a subwavelength cross-meandering resonator (0.49\(\lambda_{0}\)\(\times\) 0.49\(\lambda_{0}\)) to simultaneously achieve power frequency electromagnetic field shielding and wireless communication signal transmission. The element size of the resonator is only \(\lambda_{0}\)/11, which is much smaller than that of previous works. In the resonator, a resonance mode with the significant near-field enhancement effect (about 180 times that at \(f\) = 1 GHz) is supported. Based on the self-made shielding box experimental setup, the measured shielding effectiveness of the resonator sample can reach more than 33 dB. Moreover, by integrating the cross-meandering resonator with the MEMS sensor, a wireless communication signal can be successfully transmitted. A dual-function cross-meandering resonator integrated with sensors may find potential applications in many military and civilian industries associated with strong power frequency electromagnetic fields. cross-meandering resonator; subwavelength; electromagnetic shielding; wireless sensing communication [1][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][  
materials is also not as good as that of metal alloy materials [5]. Moreover, these methods cannot guarantee the wireless communication signal transmission of electronic sensing components. In recent years, the frequency selective surface (FSS) or microwave antenna structure has been utilized to achieve wireless communication [6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20]. For example, by combining parallel LC resonators [11] or cascaded hybrid resonant elements [13], a frequency selective surface (FSS) was designed to achieve wideband wireless communication [10; 12]. However, the difficulty of miniaturization and fabrication limits the application of FSSs in wireless communication. By using one circular bottom patch and two circular top patches in an air suspended inverted microstrip configuration, a new microstrip antenna was designed to operate at a range of frequencies of 1.8-2.6 GHz [13]. Though the overall dimension of the antenna is much smaller than that of the FSS, the ratio of its dimension to resonant wavelength is 0.94, which is not sufficient for low-frequency band applications. More importantly, these works did not experimentally explore the shielding effectiveness of the structure on power frequency electromagnetic fields. Therefore, it is still a great challenge to simultaneously achieve power frequency electromagnetic shielding and low-frequency wireless communication using a miniaturized resonant structure. In this work, a subwavelength cross-meandering resonator (\(0.49\lambda_{0}\times 0.49\lambda_{0}\)) was designed to experimentally demonstrate power frequency (50 Hz) electromagnetic shielding and wireless communication signal transmission. The resonant element (\(\sim\)\(\lambda_{0}/11\), \(\lambda_{0}\) is the free-space wavelength) is created by sequentially rotating the meander gap structure by 90\({}^{\circ}\), 180\({}^{\circ}\), and 270\({}^{\circ}\). The simulation results show that a resonant mode with a bandwidth of about 10 MHz is supported by the cross-meandering resonator. At resonance frequency (\(f\) = 900 MHz), the resonator demonstrates a significant near-field enhancement effect (about 180 times that at \(f\) = 1 GHz). Based on a self-built shielding box test setup, the power frequency electromagnetic shielding and wireless communication signal transmission measurements are performed. The measured shielding effectiveness of the whole structure is greater than 33 dB. At the same time, the wireless communication signal can be successfully transmitted through the resonator, and the chance of being received can reach up to 100%.