Optimised Design of Dual-Band Cellular Repeater At Different Frequency Bands (GSM 1800/ DCS, 3G)
Kotaprolu Nanda Kishore1, Vakkalagadda Prasad2, Mada Yaswanth Manikanta3, T.Ravi4, Anup VSAP Josyula5
1Kotaprolu Nanda Kishore, Electronics And Communication Engineering, K L UNIVERSITY, Vijayawada, India.
2Vakkalagadda Prasad, Electronics And Communication Engineering, KL UNIVERSITY, Vijayawada, India.
3Mada Yaswanth Manikanta, Electronics And Communication Engineering, K L UNIVERSITY, Vijayawada, India.
4T.Ravi, Associate Professor, Electronics And Communication Engineering, K L UNIVERSITY, Vijayawada, India.
5Anup VSAP Josyula, Electronics And Communication Engineering, K L UNIVERSITY, Vijayawada, India.
Manuscript received on Novmber 01, 2012. | Revised Manuscript Received on November 19, 2012. | Manuscript published on November 25, 2012. | PP: 1-5 | Volume-1 Issue-1, November 2012 | Retrieval Number: A0108111112/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering & Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The intended application of our Cellular Repeater is a system of duplex reception, amplification and transmission used to enhance uplink(UL) and downlink(DL) signals in areas of low signal coverage i.e.; for the situations where signal quality between the base station and the receiver is poor and communication fails. This will be helpful for cellular providers to rectify the problems of poor signal service. This Dual band Cellular Repeater consists of Bidirectional amplifier, receiving and transmitting antennas. This paper discusses our assembling process, beginning with component selection and our difficulty in obtaining the required gain according to the user requirement in the process of testing. This cellular repeater can be operated in 2 different operating frequency bands namely, GSM 1800/DCS and 3G. The operation of the repeater can be switched between the two bands depending on the user requirement using a duplexer which provides proper switching among the bands. This model helps a lot in providing efficient signal service in the weaker coverage areas in the specified band of frequency.
Keywords: Bi-Directional Amplifier (BDA), Yagi-Uda antenna, Patch panel antenna, power amplifier, GSM 1800/DCS, 3G.