IJSRP, Volume 3, Issue 4, April 2013 Edition [ISSN 2250-3153]
Dr. Debmalya Bhattacharya, Ms. Payal Bhattacherjee
WLAN requires low-cost and compact antennas with sufficient bandwidth. Chip antennas are particularly attractive as they are not substrate dependent and are solderable with standard reﬂow processes. Therefore, low-cost substrates can be used for the circuit board with no major consequence on radiation. Among possible antenna solutions dielectric resonator antennas (DRAs) offer an assembly that is surface mount technology (SMT) process compatible and their manufacturing can be based on standard processes. They also exhibit excellent properties regarding bandwidth and quasi omni directional radiation. When compactness is a main issue, conducting plates can be placed at the electric walls of the fundamental mode of the DRA to reduce its dimensions. However, this also decreases the bandwidth. Wider bandwidth structures have been proposed but they remain larger compared to a wavelength. In this paper, we propose a new DRA topology with both reduced size and large bandwidth. It has been designed for the low band of Hiperlan2 and IEEE802.11a standards [5.15–5.35] GHz. The proposed structure has been optimised using 3D EM simulations and is compared to a more conventional compact design.
A novel technique for producing enhanced band width in micro and mm wave region of spectrum is presented. A new design of compact & broadband wave dielectric resonator antenna is proposed using co-axially probe feed technique. Two different WDRA are designed and their characteristic behaviors are compared. Finally, parametric study of Second Antenna has been done. With the proper design the resonant behavior of the antenna is found, over which the leaky wave DRA produces extended bandwidth. Numerous designs for the WRDRA are simulated and bandwidths exceeding 20% are achieved.