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Nakhate, Sangeeta
- Enhancement in Range Resolution by using UWB Antenna for Bi-Static Radar System: An Overview
Authors
1 Department of Electronics & Communication, Maulana Azad National Institute of Technology-MANIT Bhopal-462051, IN
Source
Wireless Communication, Vol 4, No 13 (2012), Pagination: 759-762Abstract
Pulse compression techniques have been used in the past for increasing range resolution and to improve Signal to Noise Ratio (SNR) in a radar system. Various techniques have been used for this purpose. This paper gives brief overview about the importance of UWB antenna design and its characteristics to improve the range resolution of radar. The importance of range resolution is elaborated pictorially through an example. Further dispersive properties of various UWB antennas are discussed, that are useful for pulse compression in a radar system. The concept of Bi-static radar is described in detail that requires separate transmitting and receiving antennas. The choice of UWB antenna for transmitter and receiver of Bi-static radar is greatly dependent on its dispersive behavior. So in this paper comparative study of dispersion characteristics of various UWB antenna shapes is presented, that can be utilized to improve the pulse compression and hence to reduce the range resolution. Normally surface acoustic wave devices (SAW devices) are used for this purpose which is more costly as compared to the cost of UWB antenna used for Bi-static radar in this paper.Keywords
PCR (Pulse Compression Ratio), SAW (Surface Acoustic Wave), UWB (Ultra Wide Band), Bi-Static.
- A Novel Design and Analysis of Compact Printed UWB Antenna with Modified Ground
Authors
1 Maulana Azad National Institute of Technology Bhopal M.P., IN
2 Department of Electronics and Communication Engg, Maulan Azad National Institute of Technology Bhopal M.P., IN
Source
Wireless Communication, Vol 4, No 9 (2012), Pagination: 500-505Abstract
In this paper, a compact design and construction of microstrip Ultra Wide Band (UWB) antenna is proposed. The proposed antenna has the capability of operating between 1.8GHz to 12GHz. Bandwidth enhancement is required for practical application of microstrip antenna for wireless communication. Enhanced bandwidth supports high speed of data communication. The antenna parameter in frequency domain analysis have been investigated to show its capability as an effective radiating element. The designed antenna has a compact size of 47mm * 36mm * 1.6 mm. The simulation results demonstrated good ultra wide band linear transmission performance. The highest efficiency claimed 92% at 2 GHz and minimum efficiency is 70%.The claimed bandwidth from proposed antenna is 2.1 GHz to 10 GHz that is 7.9 GHz. Bandwidth obtained with the proposed design is very good to incorporate all applications of UWB band.