A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Jayanthy, T.
- Design and Implementation of Microstrip Patch Antenna for Wireless LAN
Authors
1 Sathyabama University, Chennai, IN
2 Panimalar Institute of Science and Technology, Chennai, IN
Source
Networking and Communication Engineering, Vol 3, No 12 (2011), Pagination: 794-798Abstract
This paper presents Design and Implementation of microstrip patch antennas for WLAN applications. Here Microstrip patch antenna for WLAN frequency (2.4GHz) was designed and simulated using different feeding techniques. There are various feeding techniques Microstrip line feed, Inset fed, Co-axial feed, Aperture coupled feed, and Proximity coupled feed used in Microstrip patch antennas. We have chosen Microstrip line feed and Co-axial feed due to the advantage that it can be easily fabricated. The simulation of microstrip antenna is carried out using ADS2009. The return loss, beamwidth and gain for microstrip line feed -12.5dB, 110o and 6dB respectively. The return loss, beamwidth and gain for co-axial fed patch antenna are -29dB, 150o and 4dB respectively. The Microstrip antenna substrate is FR4 of dielectric constant 4.6 and thickness 1.6mm. we are used same substrate for all the feeding techniques. The co-axial feed antenna resonated at 2.4GHz and Microstrip line fed antenna resonated at 2.404GHz.Keywords
Microstrip Patch Antenna, Rectangular Patch, Feeding Techniques, WLAN.
- Comparison of ARQ and Adaptive FEC Error Control Techniques in Wireless Sensor Networks
Authors
1 Sathyabama University, Chennai, IN
2 Panimalar Institute of Science and Technology, Chennai, IN
Source
Networking and Communication Engineering, Vol 2, No 11 (2010), Pagination: 466-470Abstract
This paper mainly deals with the comparative study of ARQ and Adaptive FEC error control techniques in wireless sensor networks. In Wireless sensor networks, the mode of data transmission is wireless, hence there is more possibility of errors occurring in wireless environment. The error control technique is very important which affect the parameters such as throughput, packet delivery ratio, packet lost, delay and error rate. The Adaptive forward error control technique is used to improve the throughput and reduce the error rate, there by correcting the errors and thus reducing the retransmission traffic. Two different error control techniques are analyzed and results are obtained. In ARQ the erroneous packets are retransmitted. On the other hand in Adaptive FEC technique, errors are rectified with the help of the redundant information. The trade offs between ARQ and adaptive FEC schemes are investigated. The main aim is to compare and identify the error control technique that is well suited for wireless sensor networks.