[PDF] Top 20 J. Microw. Optoelectron. Electromagn. Appl. vol.12 número1

... The sounding techniques compared in this work have been widely used for mobile radio channel characterization through the determination of time dispersion parameters like: mean delay, delay spread and coherence ... See full document

... Abstract – This paper proposes an approach to estimate the probable location of maximum exposure to electromagnetic fields associated with a radiocommunication stat[r] ... See full document

... Ultra Wide Band (UWB) monopole antennas with rectangular, square, disk, elliptical and triangular shapes have been reported [5-9]. The Hexagonal monopole antennas are found to have 10 dB return loss bandwidth for UWB ... See full document

... The algorithms sequence used in the DSP unit is depicted in Fig. 3. A deskew algorithm is used to compensate for the electrical paths differences (different electrical cables), while the orthonormalization compensates ... See full document

... To further study the sensitivity of power gain to the substrate parasitics we have simulated the power gains of HBT in both configurations with and without substrate parasitics and are shown in figures 11 and 12. ... See full document

... Artificial Neural network is an application that alters certain variables in response to a set of corresponding input and output patterns. Beginning with an initial set of internal values, the network modifies these ... See full document

... Two procedures to determine the cumulative distribution function of the ratio C/I (dB) between the desired and interference powers at the same receiving antenna were also analyzed, for different angular discrimination ... See full document

... This section focuses on the front-end in a TR-receiver which is initiated with a low noise wideband amplifier with high-gain characteristics. The proposed front-end employs a differential amplifier to avail the benefits ... See full document

... Initially, the fractal monopole antenna is simulated with the simple circular patch of radius 12. 5mm with CPW feed. The ground plane length and width are taken to be 34.64 mm and 31.1 mm. But with this circular ... See full document

... Fig. 12. Fig. 12 shows that the measured zeroth order resonant frequency, return loss, insertion loss, bandwidth and fractional bandwidth are ...Fig. 12, because of fabrication error, mismatch ... See full document

... A tapped delay line is used to model the average power delay profile (PDP) in the distributed transmission cases and shows rather different features than the single transmissi[r] ... See full document

... The conception of dual-band microstrips antennas uses various feeding techniques. However, other configurations, such as aperture, U-shape and shorting pines are also used [1-6]. Techniques used to increase the bandwidth ... See full document

... A novel 3 rd order WLAN U-band pass filter with two transmission zeros for sharp transition band using DGS, coupling matrix and multilayer technique has been designed, o[r] ... See full document

... It must be underlined that in the air gap of the IPA there are the effects of two sources of magnetic flux: the first one is a result of the travelling magnetic field produced by the p[r] ... See full document

... have been proposed in literature such as cutting a -slot [6], [7], arc-slot [8] in patch, embedding a tuning stub in slot [9], [10], inserting a slit in patch [11] and placing parasitic elements near feed [12], ... See full document

... Fiber-FWM stages considered in this work have a parameters set comprised by , , , , and (with = 1, 2 indexing the first or the second stage) that stand, respectively, for the EDFA gain, continuous wave power, continuous ... See full document

... Such a proposal establishes a methodology in the design and the deployment of wireless networks in indoor environments. For this evaluation, two experiments were conducted following the same measurement procedure, but in ... See full document

... Abstract — We present a holey fiber (HF) with elliptical air-holes located in the center core area that ensures high birefringence, near-zero ultra-flattened chroma[r] ... See full document

... To demonstrate the accuracy of simulation results, experiment sample is fabricated. The measured results about transmission curves for both polarizations are shown in Fig. 12 and Fig. 13. In Fig. 12 we have ... See full document

... Comparing the calculated values of the electric field inside the cars with exposure limits established by ANATEL for the general population to electromagnetic field of rad[r] ... See full document