Microstrip fed highly compact Bluetooth integrated wideband antenna for wireless application

摘要

In this paper, a compact microstrip fed UWB monopole antenna for dual band applications is proposed and investigated. The base of the proposed antenna is a rectangular shaped radiator. The radiator of an antenna occupies a small area of only 10.2 × 7.6 mm~2 (0.081λ_0 × 0.06λ_0) that covers the UWB frequency range. To create a dual band antenna by etching a quarter wavelength resonator, loop strips into radiator is designed which generates the notch band characteristic. The proposed structure consists of rectangular patch shape at centre with two symmetrical loop strips. Dual band antenna is designed on FR-4 substrate whose dielectric constant is 4.4, tangent loss 0.02 and thickness 1.59 mm. The overall size of proposed antenna is 15 mm × 15 mm (0.12λ_0 × 0.12λ_0)- The 10-dB impedance bandwidth of the antenna is 520 MHz (2.3-2.82 GHz) and 5.51 GHz (3.8-9.31 GHz). Also same configuration antenna is designed on Roger RT/Duroid substrate whose dielectric constant is 2.2, loss tangent 0.0009 and thickness 30 mil (0.762 mm). The simulated result is approximately same as FR-4. It covers the LTE, ISM, WLAN, WiMAX, X band satellite communication and ITU bands for wireless communications. To verify the proposed antenna design and response, a prototype has been fabricated on FR-4 and parameters are measured. The measured response validates the simulated response.