antenna parameters various generic antennas and feed systems and available software

... http://jwcn.eurasipjournals.com/content/2011/1/65 antennas and NR receive antennas, and the channel is described by an NR × NT matrix H Elements of H are modeled by a random variable that captures the stochastic ... and its closest RSs, and between adjacent RSs, and access links exist between a MS and its serving RS or BS We consider only decode and forward relaying, in which the data stream is decoded and ... the dependence of capacity on the Rice factor and antenna configuration More antennas Jacobson and Krzymień EURASIP Journal on Wireless Communications and Networking 2011, 2011:65 http://jwcn.eurasipjournals.com/content/2011/1/65...

Ngày tải lên: 21/06/2014, 01:20

... with distributed antennas with a corresponding MIMO system with colocated antennas Although the performance of MIMO systems with distributed antennas has already been considered in various publications, ... a strong duality between MIMO systems with colocated antennas (and spatially correlated links) and MIMO systems with distributed antennas (and unequal average link SNRs) To this end, we will consider ... developed for MIMO systems with colocated antennas can be reused for MIMO systems with distributed antennas, and vice versa In practice, there are several important differences between MIMO systems with...

Ngày tải lên: 22/06/2014, 19:20

... the transitional zone through adequate feeding, existing feeding practices in crop-livestock systems and farmers’ knowledge and perceptions about feeds and feeding practices should first be sought, ... norms, access to and control over resources, and roles and responsibilities, which could influence their choices with respect to feeds and feeding [4,13,19] Twenty three male and 13 female headed ... Maps, Landscape Niche Calendars, and a Feed Rank Matrix Howard and Smith’s [27] methods were used for the Forage Resource Maps and Landscape Niche Calendars For the former, important landmarks...

Ngày tải lên: 10/08/2014, 09:21

... source sizes and control strategy parameters of HEV powertrain systems Bees algorithm is chosen and developed to solve parallel and series-parallel HEV optimization ADVISOR and Matlab software will ... strategy parameters using BBA and PBA (Tab 3-7; 3-8; 3-9 and 3-10 in Appendix) - BBA and PBA have determined a new value set of control strategy parameters as shown at columns (1), (2) and (3) ... FOR HEV POWERTRAIN SYSTEMS Chapter presents a general optimization model of energy source sizes and control strategy parameters of HEV powertrain systems composed from an ICE and EMs Basic characteristics...

Ngày tải lên: 09/05/2016, 22:37

... 0.05 or 0.01 Results and discussion 3.1 Body weight and blood biochemical parameters with different nutrition diets D.N Lien et al / VNU Journal of Science, Natural Sciences and Technology 26 (2010) ... Body weight gain of mice groups with ND and HFD after weeks care (p< 0.05) Table Blood biochemical parameters of mice groups fed with ND and HFD diet Parameters Total Cholesterol (TC) mmol.l-1 ... enzymatic activity of the digestion and absorption of dietary fat such as lipase, lipoprotein lipase and enhancement of carnitine acyl transferases activity and fatty acid oxidation enzymes in...

Ngày tải lên: 14/03/2014, 10:20

... research, aluminum tubes were anodized in 2, 3, 5, 7, 10 and 20 wt% sulfuric acid at 12.5, 15 and 20 V and, 2.7 wt% oxalic acid at 30 and 40 V, respectively (see Table 1) The membranes formed ... etched and left as they were before carrying out the first anodization to aid mechanical handling The surface and cross-section view of pore structure for membranes anodized in sulfuric and oxalic ... thickness and hardness values 4.1 Pore size As shown in Fig 4(a) and (b), the average pore size of the tubular membranes were around 19 and 33 nm, when anodized in wt% sulfuric acid at 12.5 V and 2.7...

Ngày tải lên: 19/03/2014, 16:48

... are discussed The various options available for supporting variable rates and a range QoS are highlighted The UL and DL modulation and spreading schemes are described and UTRA and IMT 2000 are ... frequency and timeslot by exploiting the spatial selectivity properties offered by adaptive antennas [7] In contrast, if the desired signal and interferers occupy the same frequency band and timeslot, ... Trellis-Coded, Turbo-Equalised and Space-Time Coded OFDM, CDMA and MC-CDMA Systems, John Wiley and IEEE Press, 2004, 1105 pages • L Hanzo, T Keller: An OFDM and MC-CDMA Primer, John Wiley and IEEE Press, 2006,...

Ngày tải lên: 20/04/2014, 09:52

... transmitting antennas are divided into two basic classifications, HERTZ ANTENNAS (half-wave) and MARCONI (quarter-wave) ANTENNAS Hertz antennas are generally installed some distance above the ground and ... propagation, antenna characteristics, shore-based and shipboard communications antennas, matching networks, antenna tuning, radar antennas, antenna safety, transmission lines, connector installation and ... receivers RADAR ANTENNAS Radar antennas are usually directional antennas that radiate energy in one lobe or beam The two most important characteristics of directional antennas are directivity and power...

Ngày tải lên: 27/05/2014, 02:43

... performed with propane and methane, or propylene and methane Data sets D, and F through I, used flare vent gas with methane and hydrogen as the primary combustibles, and data sets D and F also had significant ... b 18 Upper and Center Lower and Center Ringb and Center No Steam a Test Run Count 26 12 5 Test Reports EPA-600/2-83-052; EPA-600/2-85-106; TCEQ; and INEOS TCEQ and SDP EPF FHR LOU and MPC TX ... hydrogen, other combustibles and inerts “Other combustibles” include primarily methane and other alkanes High Hydrogen and Low Olefin The test runs MPC Detroit B 8-1 and D 8-1, and Flint Hills test LOU-A...

Ngày tải lên: 28/05/2014, 14:40

... 0.39 0.61 0.63 Table pH and organic acid levels of cocoa from the fermentation trial compared to some commercial Vietnamese samples and Ghana and Malaysian samples * NA not available Table results ... mixed and placed on the dryer to note the rate of drying of a larger mass of cocoa The mass of this bulked sample was 220kg wet beans Temperature and relative humidity levels, both ambient and ... scale solar drier (3M x 3M drying bed) at Can Tho University Results and Discussion Rates of drying and changes in moisture, pH and TA are presented in the following figures 7, & 10 The conditions...

Ngày tải lên: 21/06/2014, 06:20

... some types of UWB metal-plate monopole antennas, UWB printed monopole antennas and UWB printed slot antennas are described in the chapter In the chapter design and implementation of a practical reconfigurable ... Ultra-Wideband Planar Antennas V 001 A.-D Capobianco, F.M Pigozzo, A Locatelli, D Modotto, C De Angelis, S Boscolo, F Sacchetto, M Midrio Ultra-Wideband Antenna 019 Cheolbok Kim Patch Antennas and Microstrip ... Technologies: Modern UWB antennas and equipment Fig Schematic of the candidate design with off-vertex feeding point, truncated bow-tie tips and bent feed- lines Fig Model and dimensions (in millimeters)...

Ngày tải lên: 21/06/2014, 11:20

... independent antennas Classical shapes of such antennas include 24 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment the equiangular geometries of planar and conical ... UWB antennas and equipment where  and 1 represent the inner and outer radius of the spiral (Dyson, 1959) 2.1.2 Log-Periodic Antennas Fig The logarithmically periodic antenna structure Next antenna ... (c) Fig 16 The UWB slot antennas using CPW feeding line (a) Fig 17 The Microstrip-fed /CPW-fed UWB slot antennas (d) (b) 2.2.3 Tapered Slot UWB Antennas Tapered slot antennas (TSA) belonging...

Ngày tải lên: 21/06/2014, 11:20

... antennas and equipment [6]G Dubost and S Zisler Antennas a Large Bande [M] New York: Masson, 1976:128-129 [7]N.-P Agrawall, G Kumar and K.-P Ray Wide-band planar monopole antennas [J] IEEE Trans Antennas ... resources and simulation time 60 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment Fig 13 The model of a RHC patch antenna with feed network 6.1 Feed network The feed ... ultra-wideband planar antennas have been proposed, which can be sum up as three types[5], namely the Ultra-wideband planar metal-plate monopole antennas, the UWB printed monopole antennas and the...

Ngày tải lên: 21/06/2014, 11:20

... 82 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment [44]K.-H Kim, Y.-J Cho, S.-H Hwang and S.-O Park Band-notched UWB planar monopole antenna with two parasitic ... of such antennas On the other hand, there exist some restrictions in optimum and efficient performance of rectangular slotted waveguide antennas due to the use of rectangular waveguides and slots ... Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment architecture is discussed, also design and implementation procedures of all microwave parts such as ultra wideband amplifiers,...

Ngày tải lên: 21/06/2014, 11:20

... third method used three antennas A, B and C, generally the tested antenna and two other antennas Three different power budgets are carried out, with the three possible antennas pairs leading to ... Broadband compact ranges are available: 0.7GHz-100GHz with 3.6m cubic quiet zone For such ranges, 200 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment several feed antennas ... receiving antenna, Pi the power accepted by the transmitting antenna,  is the wavelength and r the distance between the two antennas The use of this formula requires that the two antennas A and B...

Ngày tải lên: 21/06/2014, 11:20

... directive antennas and the cylindrical system requires antennas with directive pattern in at least one plane Spherical near-field systems are convenient for omni-directional and directive antennas ... different electromagnetic diagnosis: reflector antenna diagnosis and array antenna diagnosis 206 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment Cylindrical near-field range ... array antenna, IEEE Transactions on Antennas and Propagation, Vol.AP36, n°6, June 1988, ISSN 0018-926X Lemanczyk, H (1988) Comparison of near-field range results, IEEE Transactions on Antennas and...

Ngày tải lên: 21/06/2014, 11:20

... Microwave and Optical Technology Letters, Vol 36, No 1, (Jan 2003) 16-20, ISSN 08952477 V Agrawal and Y Lo (1972) Mutual coupling in phased arrays of randomly spaced antennas, IEEE Transactions on Antennas ... spacing, IRE Transactions on Antennas and Propagation, Vol 9, No 2, (Mar 1961) 187-192, ISSN 0096-1973 242 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment R Haupt (1994) ... Modern UWB antennas and equipment will be amplified and radiated into the air via an antenna In uplink, the 38-GHz signal from the antenna is amplified by a low noise amplifier (LNA) and then mixed...

Ngày tải lên: 21/06/2014, 11:20

... the use of antennas with stronger pattern directivity while maintaining small antenna dimensions When such antennas are used, however, antenna obstruction (e.g., by a human body) and mispointing ... Measurement and modeling of rain intensity and attenuation for the design and evaluation of microwave and millimeter-wave communication systems 271 14 x Measurement and modeling of rain intensity and ... of DSD Measurement and modeling of rain intensity and attenuation for the design and evaluation of microwave and millimeter-wave communication systems 273 proposed by Marshall and Palmer (1948)...

Ngày tải lên: 21/06/2014, 11:20

... 330 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment the resonator and these have quite low Q’s of around 3-5 at GHz frequency range and on the other hand, it takes ... model parameters for Si-substrate (R, C) are 332 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment estimated by the dielectric characteristics, and the rest of the parameters ... 336 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment Finally, the Z -parameters which are transformed from S -parameters are compared with measured results and simulation...

Ngày tải lên: 21/06/2014, 11:20

... V and W bands are presented and analyzed In addition, a Ka band demodulator and a W-band radar sensor prototype are presented Present and future works are focused on UWB multi-port receivers and ... MHz reference (Ka band) W Ka band LO PSK, QAM (250 MHz) PSK, QAM (Ka band) (a) I Ka-band six-port demodulator Q x y (b) Fig 27 Block diagram (a) and photograph (b) of the Ka-band demodulator test ... Microwave Theory and Techniques Symposium, pp 1553-1556, 1994 388 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment Li, J., Bosisio, R.G & Wu, K (1995) Computer and Measurement...

Ngày tải lên: 21/06/2014, 11:20