Array Antennas Comprised of Tetragons for RFID Applications
Manato Fujimoto,
Yukio Iida
Issue:
Volume 3, Issue 2, March 2015
Pages:
13-17
Received:
25 January 2015
Accepted:
13 February 2015
Published:
25 February 2015
Abstract: The location estimation capability of a RFID (Radio Frequency Identification) technology is useful for indoor navigation systems on mobile robots. In this paper, we study a simple and small structural antenna at 2.5GHz band that can reduce the beam when installed on a mobile robot. An antenna with small occupation volume by a mechanical rotation is assumed. We used electromagnetic field simulation and experimental results to design a simple structural antenna. Our design culminates in two antennas comprised of Tetragon elements formed with wires. One is called Tetra-4, and is an antenna which has a lateral arrangement of four tetragons. Because the input impedance is considerably high, Tetra-4 is suitable for use in the high impedance system. When driving in 100 Ωbalanced system, the gain of Tetra-4 is 8dBi. The half-power band width (HPBW) in the H-plane is 38 degrees, and is 0.44 times that of a dipole with a reflector. Another one is Yagi-Uda antenna comprised of two tetragon elements. When driving in 50 Ωbalanced system, the gain is 11dBi. The HPBW is 40 degrees in the H-plane and is 36 degrees in the E-plane.
Abstract: The location estimation capability of a RFID (Radio Frequency Identification) technology is useful for indoor navigation systems on mobile robots. In this paper, we study a simple and small structural antenna at 2.5GHz band that can reduce the beam when installed on a mobile robot. An antenna with small occupation volume by a mechanical rotation is...
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Performance Assessment of Mimo Mccdma System on Video Signal Transmission with Implementation of Various Digital Signal Processing Techniques
Md. Sarwar Hosain,
Mousumi Haque,
Shaikh Enayet Ullah
Issue:
Volume 3, Issue 2, March 2015
Pages:
18-26
Received:
27 March 2015
Accepted:
11 April 2015
Published:
21 April 2015
Abstract: In this paper, we made a comprehensive study to evaluate the performance of MIMO MCCDMA wireless communication system on video signal transmission. The 4-by-4multi antenna supported MCCDMA system incorporates various digital signal processing techniques such as Minimum mean square error (MMSE) , Zero-Forcing (ZF), Ordered successive interference cancellation (OSIC) and Lattice Reduction aided MMSE for transmitted signal detection and two-dimensional nonlinear Median filtering for noise reduction. It is observable from MATLAB based simulations that the system shows quite satisfactory performance under scenario of MMSE signal detection scheme.
Abstract: In this paper, we made a comprehensive study to evaluate the performance of MIMO MCCDMA wireless communication system on video signal transmission. The 4-by-4multi antenna supported MCCDMA system incorporates various digital signal processing techniques such as Minimum mean square error (MMSE) , Zero-Forcing (ZF), Ordered successive interference ca...
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