Gain and side-lobe improvement of W-band microstrip array antenna with CSRR for radar applications

Aulia Dewantari, Jaeheung Kim, Se Yeon Jeon, Seok Kim, Min Ho Ka

Research output: Contribution to journalArticle

13 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)702-704
Number of pages3
JournalElectronics Letters
Issue number11
Publication statusPublished - 2017 May 25


All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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