Circularly Polarized On-Chip Antenna for 60GHz Indoor Wireless Communications

This Work presents an On-chip circularly polarized antenna for 60GHz WPANs and indoor applications. 90nm CMOS technology with nine metal layers is used for design procedure. The chip size is 0.8×0.8 mm². The antenna configuration consists of a patch on top metal layer (M9) and a ground plane on second metal layer (M2). Slot radiators are considered on the ground plane to enhance radiation efficiency. The antenna structure is fed by a 50Ω port. Results are discussed when using M1 and M2 layers as the ground plane, separately. For the case where M2 layer is used as the ground plane, optimum results are achieved. Proposed antenna operates from 59.2GHz to 63.5GHz. The antenna is LH circularly polarized with gain value of 1dB at 60GHz for θ=0°. Simulated axial ratio is below 3dB from 59.6GHz to 62.7GHz and HPBW of the gain is 130° on φ=0 plane.

I. Introduction

Penetration of handheld devices in peoples life has push wireless communication networks to use high speed links with the required bandwidth. Nowadays almost every electric gadget has ability to communicate with a user and connect to a network. It has been forecasted that in few years vehicles, home appliances and multimedia devices will be able to connect to a network to execute commands. Our peripheral environment is saturated with electromagnetic waves. Numerous wireless scenarios are being used widely for Personal Area Networks at Industrial, Scientific and medical (ISM) bands such as Bluetooth^® and Zigbee® [1].