Unlike all recent research which used Concentric Circular Antenna Array (CCAA) based on one beam-former for each single main beam, this research presents a technique to adapt smart CCAA by using only single beam-former for multi main beams based on hybrid PSOGSA. Hybrid PSOGSA is a combining technique between Particle Swarm Optimization and Gravitational Search Algorithm which is applied in the...

We report a direct write inkjet printing technique for fabricating a flexible antenna on textile for use in smart textile applications such as wearable systems (Rienzo et al. 2006). The complete antenna was deposited entirely using inkjet printing. The inkjet printed antenna is based on a half wavelength dipole antenna offering a planar structure and acceptable size. The printable silver nanopa...

The present paper analyses and documents the merits of incorporating fractal design in microstrip antenna intended to be mounted on and integrated into the design of smart vehicles. A novel design is proposed for a compact tri-band hexagonal microstrip antenna to be integrated with the body of a smart vehicle for short range communication purpose in an Intelligent Transport System (ITS). This a...

The development of efficient vehicle-to-vehicle (V2V) communications systems requires an understanding of the underlying propagation channels. In this paper, we present results on pathloss, power-delay profiles (PDPs), and delay-Doppler spectra from a high speed measurement campaign on a highway in Lund, Sweden. Measurements were performed at a This work is an extended version of the conference...

This paper presents the DOA based adaptivebeamforming algorithm of smart antenna systems for mobile communications.Two stages are involved to control the radiation pattern, while maximizing the signal power towards the desired direction and suppressing the interference from undesired direction. The first stage consists of estimating the directions of arrival of all wave fronts impinging on an a...

To improve the performance of 802.11 WLAN systems under congestion conditions, an agent-based radio resource management system is proposed that can dynamically change an Access Point’s radio coverage pattern. A low-cost four sector semi-smart antenna array is used for access points. With a distributed simulation system using Multi-Agent Platform, we present statistical results showing system pe...

In the last years wireless communication systems attracted commercial interest because of the possibility of developing innovative mobile networks. Cognitive Radios and Smart Antennas are technologies that could allow substantial improvement both for user and system sides. In particular in this paper the attention is focused on the antenna equipment for a Cognitive Base Transceiver Station (CBT...

This paper presents a multiband folded loop antenna for smart phone applications. The proposed antenna with a symmetric loop pattern generates four resonance modes in the design bands. The current distributions of the excited resonance modes are analyzed to confirm the mode characteristic. Using a pair of tuning elements near the feed port, the impedance bandwidth is broadened to cover GSM850/G...