Monopole antenna for GSM, Bluetooth, and UWB applications with dual band-notched characteristics

Abstract

A novel multi-band planar monopole antenna for various wireless communication applications is presented. The base of the proposed antenna is an ellipse-shaped patch that covers the ultrawideband (UWB) frequency range. To create extra frequency bands below the UWB band, two narrow quarter-wavelength strips are attached to the high concentrated current area of the patch. Two notched bands, centred at 3.5 GHz WiMAX and 5.5 GHz WLAN, are also created by similarly integrating strips to the radiation patch. The proposed multi-band antenna has a small size of 30 × 30 mm² and covers GSM (1.77–1.84 GHz), Bluetooth (2.385–2.49 GHz) and UWB (3.1–10.6 GHz) bands. Simulated and measured results are presented and compared, which show that the antenna has omnidirectional and stable radiation patterns across the entire passband. Furthermore, good group delay and transmission characteristics can be achieved in the UWB band.

Keywords:

• multi-band antenna
• ultrawideband (UWB) antenna
• extra frequency band
• notched band

Funding

This work was supported by the NSFC under [grant number 61101066]; the Fundamental Research Funds for the Central Universities; the Program for New Century Excellent Talents in University of China; National Key Laboratory Foundation; Natural Science Basic Research Plan in Shaanxi Province of China [grant number 2013JZ019]; and Foundation for the Returned Overseas Chinese Scholars.