Printed multiband monopole antenna with independent tuning suitable for compact wireless devices

Abstract EN

A new configuration of planar multi-band antenna is demonstrated in this paper.

The proposed antenna is generally based on a printed rectangular monopole antenna (PRMA) that covers a wideband of 3.3 GHz WiMAX frequency range.

To generate a multi-band property, an asymmetric triangular shaped slot (ATSS) is inserted into the center part of PRMA in order to construct two right angles triangle strips, which possess several quarter wavelength parts.

The Quad band resonant modes of 1.8GHz, 2.4GHz, 3.7GHz, and 5.3GHz were realized due to the different lengths and widths of the triangular planar monopole strips.

The distinctive aspect of the antenna is that it can serve several different communication systems simultaneously.

These systems include various combinations of GSM1800, DCS, PCS, WLAN, and WiMAX applications.

Moreover, the four individual frequency bands can be adjusted and set independently over wide ranges of 12.86%, 9.72%, 17%, and 6.54%, respectively, using simple parameters of the antenna.

This basically means that a variety of other communication systems can be conveniently served by only one antenna.

The designed antenna has a simple planar structure and a compact size of 30x45 mm.

Simulation results showed that the peak realized gain of the antenna at different operating bands of 1.8GHz, 2.4GHz, 3.7GHz, and 5.3GHz were 1.5dBi, 2.75dBi, 4.7dBi, and 4dBi, corresponding to 75.8%, 83.6%, 81.6%, and 82.5% radiation efficiency, respectively.

Simulation results were obtained from the commercial CST Microwave Studio.