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

Abstract

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.

Realisasi dan Pengujian Antena Mikrostrip Array 4 Elemen dengan Polarisasi Melingkar untuk Aplikasi 4G/LTE

“…Pada penelitian ini digunakan metode truncated corner dengan memotong sisi bagian pinggir atas dan bawah pada antena bentuk persegi panjang, pemilihan metode ini dikarenakan dimensi awal dari antena mikrostrip yang dirancang adalah persegi panjang sehingga penggunaan metode truncated jauh lebih mudah dan efektif dalam perancangannya, selain itu penggunaan metode truncated corner juga mereduksi dimensi antena menjadi semakin kecil sehingga menghasilkan dimensi yang lebih kompak. Sedangkan untuk meningkatkan nilai penguatan antena mikrostrip dapat dilakukan dengan menggunakan beberapa metode antara lain array (Dewantari, A., Kim, J., Jeon, S. Y., Kim, S., & Ka, M. H., 2017), parasitic (Li, H., Lan, B., Ding, J., & Guo, C., 2017) dan stacked (Padhi, J., & Dash, M., 2017). Metode array dilakukan dengan cara menyusun antena mikrostrip menjadi beberapa patch yang dihubungkan dengan saluran pencatu (microstrip line).…”

Metallic and dielectric hybrid 3D printed K‐band dielectric‐loaded antenna with reduced sidelobe

“…Javanbakht et al [10] proposed a thinned array with non‐equal slots distribution to achieve the SLL down to −20 dB. A complementary split‐ring resonator (CSRR) on the ground plane of a patch array was used by Dewantari et al [11] to tune the phase of the ground‐reflected EM waves for low sidelobe. An unequal power divider was designed for a monopulse array for sidelobe cancelling [12].…”

Proximity‐coupled feed patch antenna array for 79 GHz automotive radar

“…Microstrip patch antenna array has advantages such as low‐cost, easy‐to‐integrate [4] etc., and has been widely used in the design of vehicle‐mounted millimetre‐wave radar antennas. However, most of those antennas do not have sufficiently high gain or have a limited degree of freedom for the choice of broadband (e.g.…”