Apinya Innok

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
This paper aims to present the benefit of using a Butler matrix for MIMO systems employing angle domain processing instead of array domain processing. By applying Butler matrix, the concept of angle domain processing can be realized in practice and it still takes a full advantage of multiple antennas. The different scenarios of a fading MIMO environments(More)
This paper presents the design of a dual-band bidirectional ring antenna fed by a superellipse surface probe for 2.4/5GHz WLAN applications. The Method of Moments (MoM) with RWG basis function was utilized in the study and design processes. A prototype antenna was fabricated successfully with the advantages of simple and low-cost structure. The measured(More)
This paper focused on investigating the enhancement of bandwidth for rectangular slot antenna with L-shaped and double I-shaped stub tuning. The bandwidth was increased from the original antenna by using the I-shaped stub tuning technique through adding tuning on both sides of ground plane for matching impedance 50Ω. The results indicated that the(More)
This paper presents the directive gain enhancement of rectangular slot antenna with L-shaped and double I-shaped slot etching and metal box adding technique at 2.45 GHz for wireless communications. In many previous antenna researches, a large size of traditional antenna and low directive gain are the defect of antenna. That defect can be overcome by(More)
For MIMO beamforming, the Eigen Beamforming (EB) technique provides the best performance with the expense of knowing full channel information. To reduce such an expense, the Quantized Beamforming (QB) has been presented by using only some feedback bits to calculate the suitable beamforming vectors. However, QB has a drawback in the complexity of finding the(More)
  • 1