A new method for suppressing surface waves on a millimetre-wave microstrip array antenna is presented. A 10 × 2 patch array antenna is designed at 77 GHz for W-band radar applications. Complementary split ring resonator (CSRR) has been designed at 77 GHz, etched on the antenna ground plane. Simulation and experimental results are compared in terms of the gain and the side lobe level with and without CSRR. CSRR between series patch antenna array could suppress surface waves effectively so that this approach enhances the gain and reduces the side lobe level. The measured gain improvement in the antenna with CSRR is 2.5 dB. The side lobe level of the antenna with CSRR is reduced up to 3.5 dB lower than antenna without CSRR.
Bibliographical noteFunding Information:
This research was supported by the MSIP (Ministry of Science, ICT and Future Planning), Korea, under the 'ICT Consilience Creative Program' (IITP-R0346-16-1008) supervised by the IITP (Institute for Information & communications Technology Promotion). This research was also supported by Civil-Military Technology Cooperation Program and Electronic Warfare Research Center at Gwangju Institute of Science and Technology, originally funded by Defense Acquisition Program Administration and Agency for Defense Development.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering