High Gain Circularly Polarized Cylindrical DRA for mm-wave On-chip Applications

A circularly polarized (CP) cylindrical dielectric resonator antenna (CDRA) at millimeter wave frequency is designed to obtain improved antenna gain. The cylindrical DRA mounted on a Silicon substrate, on-chip-antenna (OCA), which is excited by simple dual conformal microstrip feeding network. Circular polarization is produced by exciting two broadside fundamental orthogonal hybrid modes inside CDRA. The proposed CP CDRA antenna is simulated using ANSYS HFSS software and it demonstrates a peak gain of 1.9 dBiC with a 3 dB axial ratio (AR) bandwidth of 4.7 % at center frequency of 53.525 GHz and impedance band-width of 19.3 % at center frequency of 54.9 GHz.

1 Introduction

An on-chip-antenna (OCA) is an integral component of System-on-Chip (SoC) based wireless communication systems built on a silicon substrate and its integration with chip helps realising compact designs. OCAs find their applications in biomedical implants, RFID based SoC, next generation mobile terminal, etc. [1]. Various techniques are explored to design on-chip circular polarized (CP) antennas for millimeter-wave applications. In [2], although good axial ratio (AR) bandwidth and impedance bandwidth achieved but gain was very low at - 4.4 dBiC and the structure is complex with artificial magnetic conductor (AMC). Despite good AR bandwidth in [3], gain and impedance bandwidth are low. Various CP DRA designs have been explored in the mm-wave frequency but not for on-chip mm-wave applications. To the best of the authors’ knowledge, this paper presents first DRA design that finds its usage in mm-wave frequency on-chip CP applications.