E. Almahdi Elkhazmi

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In this paper, a balanced antenna for mobile handset applications with dualfrequency performance, covering the 2.4 GHz and the entire 5GHz WLAN frequency bands, is investigated and discussed. The antenna is a thin-strip planar dipole with folded structure and a dual-arm on each monopole. For validation, the antenna prototype was fabricated and tested. The(More)
Discrete wavelet transform (DWT) for Multiple Input Multiple Outputs (MIMO) bandlimited systems is investigated. The implementation involves using the DWT as the base multiplexing technology at the baseband to process the input signal. Using the Alamouti diversity technique, an investigation for a DWT-MIMO multicarrier system is presented. Results shown are(More)
The performance of six configurations for focused array antennas is investigated. The proposed arrays are in the form of; Ring, Four corners with central elements, Ring with Cross, Four orthogonal arrows rotated by 45 degree, Octal with Cross and Octal with Cross without central elements arrays. The studied parameters are the size of focal spot, the depth(More)
This paper investigates the performance of wavelet OFDM signals over a wireless communications link. The scheme is shown to be generally similar to Fourier based OFDM, but with some additional features, and improved characteristics. The sensitivity of both schemes to the nonlinear amplification in the transmitter is compared by monitoring the time domain(More)
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