Abstract—Impact of electromagnetic interference on front-end receiver behaviour is theoretically and experimentally studied outside the bandwidth of the antennas. Microwave chaotic generation is observed. Under certain conditions, reflected waves combined to the non linearity of the front-end receiver leads to a chaotic signal generation between the antenna and the front-end receiver. Different...

The design of a novel CPW-fed printed slot-loop antenna with narrowband omnidirectional attributes is proposed. The antenna geometry is selected to reduce slot coupling, thus achieving both a narrow bandwidth and an omnidirectional radiation pattern simultaneously. A gain of 2.1 dBi is accomplished with high radiation efficiency. Very narrow fractional impedance bandwidths as low as 2.9% are re...

Applications of millimeter-wave radar, imaging, and communication technology requires cost-effective implementation of intelligent scanning antenna systems. Injection-locking and phase-locked-loop (PLL) techniques can be used to achieve synchronous operation of a number of antenna array elements, and allow for the manipulation of the phase distribution without additional phase-shifting circuitr...

Recently, differential-signaling (DS) techniques such as low-voltage differential signaling (LVDS) have come into wide use in digital electronics devices to suppress electromagnetic interference (EMI). In this paper, we attempted to newly identify the frequency responses of the EM radiation from a PCB driven by LVDS, using three EMI-antenna models. EM radiation is modeled and analyzed as EMI an...

In a multiple-input multiple-output (MIMO) channel, created by employing multiple antennas at the transmitter and receiver, the system capacity and diversity dramatically increase. In a view of diversity, the space time block code (STBC) was proposed to enhance diversity gain. On the other hand, the bell labs layered space time architecture (BLAST) can achieve full data rate. To achieve both ad...

In recent years, the demands on a large capacity, high-reliability and high quality are remarkable in the wireless communication system. UWB (Ultra Wide Band) wireless communications can transmit at a speed of several gigabits per second [1]. A wideband antenna is required for the system because a very wide frequency band is utilized in UWB. However, it is difficult to obtain an antenna that ha...

The electromagnetic fields far from any antenna can be conveniently described as the sum of the radiation fields of a series of oscillating point multipoles, of which the leading term is a dipole in many cases of practical interest. The form of the fields associated with the nth multipole is independent of the details of the physical layout of the antenna (other than that the layout determines ...

This paper presents a generic small scale channel model for ultra wideband wireless body area network communications. It is based on static on-body measurements in an anechoic chamber by using a vector network analyzer within a 2-8 GHz bandwidth. Two antenna types are used for the examination: dipole and double loop. From the existing data, a generic average channel impulse response (CIR) was e...

A new meta-surface structure (MSS) with a near-zero refractive index (NZRI) is proposed to enhance the performance of a square loop antenna array. The main challenge to improve the antenna performance is increment of the overall antenna volume that is mitigated by assimilating the planar NZRI MSS at the back of the antenna structure. The proposed NZRI MSS-loaded CPW-fed (Co-Planar Waveguide) fo...