DESIGN OF MICROSTRIP ANTENNA IN CST MICROWAVE STUDIO PATCH
Microstrip patch antennas have found many applications in wireless communication systems, because of their light weight, low profile, low cost, high performance, and compact size, besides an easy design, fabrication, and integration into frontend circuits. In modern wireless systems, different bands of the frequency spectrum are used to fulfil the high data rate required in the communications, and the antennas of these communication systems must operate in different frequency bands (multiband antennas).
The proposed structure can be used also as a conformal antenna, and its frequency response and radiated field are satisfactory for curvatures up to 65°. Moreover, it has a compact size, is very easy to realize, and presents a discrete out-of-band rejection, without requiring the use of stop-band filters. The comparison between simulated and measured results shows that the proposed antenna can be used for wireless communications for WLAN systems, covering both the WLAN S-band (2.45 GHz) and C-band (5.2 GHz), and the Wi-Max 3.5 GHz band, with satisfactory input matching and broadside radiation pattern. The antenna has been designed using a general-purpose 3D computer-aided design software (CAD), CST Microwave Studio, and then realized. The antenna is fed by a proximity-coupled microstrip line, and it is printed on a flexible substrate. A multiband printed microstrip antenna for wireless communications is presented.