 Home
 Products
 Integration
 Tutorial
 Barcode FAQ
 Purchase
 Company
ssrs 2014 barcode Six z in Software
Six z Decoding Denso QR Bar Code In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. Generating QR Code In None Using Barcode encoder for Software Control to generate, create QR Code image in Software applications. P r
Recognize Quick Response Code In None Using Barcode scanner for Software Control to read, scan read, scan image in Software applications. Denso QR Bar Code Encoder In Visual C#.NET Using Barcode generator for .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications. The spherical coordinate system.
Draw QR Code ISO/IEC18004 In .NET Using Barcode creator for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications. Generate QR Code In .NET Using Barcode drawer for Visual Studio .NET Control to generate, create QR Code image in Visual Studio .NET applications. which gives the distance between point P and the antenna; is the angle measured from the x axis to the projection of r in the xy plane; and is the angle measured from the z axis to r. It is important to note that the x, y, and z axes form a righthand set. What this means is that when one looks along the positive z direction, a clockwise rotation is required to move from the positive x axis to the positive y axis. (This is the same as the righthand set introduced in Sec. 5.1) The righthand set rotation becomes particularly significant when the polarization of the radio waves associated with antennas is described. 6.4 The Radiated Fields There are three main components to the radiated electromagnetic fields surrounding an antenna: two nearfield regions and a farfield region. The field strengths of the nearfield components decrease rapidly with increasing distance from the antenna, one component being inversely related to distance squared, and the other to the distance cubed. At comparatively short distances these components are negligible compared with the radiated component used for radio communications, the field strength of which decreases in proportion to distance. Estimates for the distances at which the fields are significant are shown in Fig. 6.4a. QR Code Maker In VB.NET Using Barcode encoder for .NET framework Control to generate, create Denso QR Bar Code image in .NET framework applications. Data Matrix ECC200 Generation In None Using Barcode generator for Software Control to generate, create Data Matrix ECC200 image in Software applications. Antennas
Painting Code 128C In None Using Barcode maker for Software Control to generate, create Code128 image in Software applications. Generating EAN13 In None Using Barcode generator for Software Control to generate, create EAN13 Supplement 5 image in Software applications. Radiating nearfield (Fresnel) region
Generating Code 3 Of 9 In None Using Barcode maker for Software Control to generate, create Code 39 Full ASCII image in Software applications. Barcode Drawer In None Using Barcode creator for Software Control to generate, create barcode image in Software applications. Reactive nearfield region
Encoding USD3 In None Using Barcode generation for Software Control to generate, create USD3 image in Software applications. Matrix Barcode Encoder In VS .NET Using Barcode generator for ASP.NET Control to generate, create Matrix Barcode image in ASP.NET applications. Farfield (Fraunhofer) region
Encode UPCA In Java Using Barcode generator for Java Control to generate, create UCC  12 image in Java applications. Create Barcode In Java Using Barcode printer for Java Control to generate, create barcode image in Java applications. R2 = 2D2
Generating EAN / UCC  13 In Visual Basic .NET Using Barcode creator for Visual Studio .NET Control to generate, create GS1 128 image in VS .NET applications. Recognizing GTIN  128 In Visual C#.NET Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET applications. R1 = .62 Painting EAN13 In ObjectiveC Using Barcode drawer for iPad Control to generate, create GTIN  13 image in iPad applications. Create DataMatrix In .NET Using Barcode generation for Visual Studio .NET Control to generate, create Data Matrix ECC200 image in .NET applications. D3 (a) The electromagneticfield regions surrounding an antenna. (b) Vector diagrams in the farfield region. Here, D is the largest dimension of the antenna (e.g., the diameter of a parabolic dish reflector), and l is the wavelength. Only the farfield region is of interest here, which applies for distances greater than about 2D2/l. In the farfield region, the radiated fields form a transverse electromagnetic (TEM) wave in which the electric field is at right angles to the magnetic field, and both are at right angles (transverse) to the direction Six
of propagation. The vector relationship is shown in Fig. 6.4b, where E represents the electric field, H the magnetic field, and k the direction of propagation. These vectors form a righthand set in the sense that when one looks along the direction of propagation, a clockwise rotation is required to go from E to H. An important practical point is that the wavefront can be assumed to be plane; that is, E and H lie in a plane to which k is a normal. In the far field, the electric field vector can be resolved into two components, which are shown in relation to the coordinate system in Fig. 6.5a. The component labeled E is tangent at point P to the circular arc of radius r. The component labeled E is tangent at point P to the circle of radius r sin centered on the z axis (this is similar to a circle of latitude on the earth s surface). Both these components are functions of and and in functional notation would be written as E ( , ) and E ( , ). The resultant magnitude of the electric field is given by E 2E (6.1) If E and E are peak values, E will be the peak value of the resultant, and if they are rms values, E will be the rms value of the resultant. The vector E0 shown at the origin of the coordinate system represents the principal electric vector of the antenna itself. For example, for a horn antenna, this would be the electric field vector across the aperture as shown in Fig. 6.5b. For definiteness, the E0 vector is shown aligned with the y axis, since this allows two important planes to be defined: The H plane is the xz plane, for which The E plane is the yz plane, for which 0 90 Magnetic field vectors are associated with these electric field components. Thus, following the righthand rule, the magnetic vector associated with the E component will lie parallel with E and is normally denoted by H , while that associated with E will lie parallel (but pointing in the opposite direction) to E and is denoted by H . For clarity, the H fields are not shown in Fig. 6.5, but the magnitudes of the fields are related through the wave impedance ZW. For radio waves in free space, the value of the wave impedance is (in terms of field magnitudes) ZW E H E H 120 (6.2)

