H-Shaped Dielectric Resonator Antenna for UWB application



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INTRODUCTION
The extremely wide spectrum of 3.1 to 10.6 GHz with 15 bands of bandwidth greater than 500 MHz and power limit less than -41.3 dBm/MHz announced by FCC for Ultra wide band. The release of this Spectrum has rapidly increased the research in UWB technology for communications, radar imaging, and localization applications [1]. Radio systems based on UWB technology offer opportunities for transmission of high data rate signals, coding for security and low probability of intercept, especially in multi user network applications [2]-[5]. UWB communication systems have the promise of very high bandwidth, reduced fading from multipath in mobile communication and low power requirements. In general, UWB radio systems transmit and receive temporally short pulses without carriers or modulated short pulses with carriers.


CONFIGURATION OF ANTENNA

the proposed DRA. The size of DRA is 14mm length and 16.3 mm width and 6 mm thickness with dielectric constant 10.2, and it is placed on 26 × 28 mm2 substrate with dielectric constant 1.06 and thickness of 0.7 mm. The ground plane is partially printed below the substrate.


RESULT AND DISCUSSION

The commercial 3D full wave electromagnetic (EM) simulation
software CST Microwave studio is used for simulation. Fig. 2.
Compares return loss with and without ground slot. With ground
slot total ultra wide band is covered. The slot in the ground
plane is affecting the lower frequencies.


CONCLUSION
H-Shaped dielectric resonator antenna has been designed with
low dielectric constant and the parametric study has been done.
With the slot in the ground plane the antenna covers total Ultra
wide band. The constant path loss and Group delay, correlation
factor calculated shows that the antenna is well suited for UWB
applications. Fabrication of the proposed antenna will be carried
out in future.