Houssam Kanj

Compact Multiband Folded 3-D Monopole Antenna

In this letter, we present the design and the detailed analysis of a novel antenna based on the monopole element for multiband mobile handsets. The proposed antenna is a hex-band antenna that covers the 800/900/1800/1900, 2100, and the 2400 bands. The antenna is folded in 3-D providing a compact form to enable its implementation internally without compromising its performance. It is optimized through extensive numerical simulations and experimental prototyping. Different design parameters are identified and their effects on the antenna performance is presented. The antenna performance is shown through the simulated and measured return loss as well as the simulated radiation patterns and efficiency. Its total volume is only 1.6 cm3 . The results show good return loss, radiation patterns, and efficiency performance.

A 3D-to-2D Transform Algorithm for Incorporating 3D Antenna Radiation Patterns in SCM

We present a method to incorporate the effect of the three-dimensional (3D) antenna radiation patterns into a two-dimensional (2D) multiple-inputmultiple-output (MIMO) channel model. The proposed method is a low-complexity technique that increases the accuracy of existing 2D spatial channel model (SCM) proposed by 3GPP for performance analysis of long-term evolution (LTE) MIMO. Using a realistic 3D antenna field pattern and the 2D 3GPP SCM, the 3D-to-2D transform algorithm (3D-2D-TF) gives a 5% outage capacity within 0.5 b/s/Hz when compared to a higher complexity averaging approach using 18-cut planes (18-CP) of the 3D radiation pattern. This is achieved with 6% of the run-time complexity. By not including the elevation information, the original SCM 2D model gives an outage capacity prediction error of up to 2.4 b/s/Hz as compared to the 18-CP averaging approach. The 3D-2D-TF is therefore a promising low-complexity candidate that increases the accuracy of 2D channel models for MIMO 4G performance evaluations.

A broadband folded monopole antenna for the handheld device

A novel internal monopole antenna design is presented in this paper that is intended for the handheld device. The proposed design covers GSM 800/900/1800/1900, GPS 1500, UMTS 2100, and Bluetooth 2400 bands. A broadband performance is obtained at all the frequencies of interest. The design is examined and optimized by measurements and simulations using a MoM-based solver. The results show excellent antenna performance.