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Ngày tải lên: 09/07/2014, 19:20

Ngày tải lên: 28/08/2013, 10:23

... the appendices. Chapter 2 provides an overview of wireless communication systems and their characteristics. 8 INTRODUCTION TABLE 1.4 Selected Applications of Microwave Solid-State Devices Devices Applications ... carry the video information as well. Table 1.1 shows the frequency bands used for commercial radio and television broadcasts. In the case of digital transmission, a standard monochrome television ... terrestrial communication system. Figures 1.3 and 1.4 list selected devices used at RF and microwave frequencies. Solid-state devices as well as vacuum tubes are used as active elements in RF and microwave...

Ngày tải lên: 15/12/2013, 11:15

... illustrated in Figure 2.7. A microwave signal generated by the oscillator is split into two parts via the power divider. The circulator feeds one part of this power to the antenna that illuminates a target ... Doppler frequency if the target is moving. Note that the signal travels twice over the same distance and, therefore, the Doppler frequency shift in this case will be twice that found via (2.4.33). Mathematically, o o  ... on-board electronics before transmitting it back. The gravitational force needs to be balanced somehow if this object is to stay in position. An orbital motion provides this balancing force. If a satellite...

Ngày tải lên: 15/12/2013, 11:15

... converted to corresponding impedance by moving to a point on the diametrically opposite side of the VSWR circle. It shows a normalized load impedance as 2  j2. Moving from this point by 3.15 l toward ... transformer is also presented along with a few examples to match resistive loads. Impedance measurement via the voltage standing wave ratio is then discussed. Finally, the Smith chart is introduced to ... Solutions to the transmission line equation are then constructed in order to understand the behavior of the propagating signal. This is followed by the concepts of sending end impedance, re¯ection...

Ngày tải lên: 15/12/2013, 11:15

... 3417,respectively. Substituting these into (4.5.5), Q of this cavity is found to be 2106. Circular Cylindrical Cavities Figure 4.20 shows the geometry of a circular cylindrical cavity of radius r and height h. It is ®lled ... CIRCUITS If the cavity is made of a perfect conductor and ®lled with a perfect dielectric then it will have in®nite Q. However,it is not possible in practice. In the case of cavity walls having a ®nite ... ac 3   m r e r r 4:5:2 Permittivity and permeability of the dielectric ®lling are given by e and m, respectively; o is angular frequency; and R s is the surface resistivity of walls which is related...

Ngày tải lên: 15/12/2013, 11:15

Ngày tải lên: 15/12/2013, 11:15

Ngày tải lên: 15/12/2013, 11:15

Ngày tải lên: 24/12/2013, 17:15

Ngày tải lên: 24/12/2013, 17:15

Ngày tải lên: 24/12/2013, 17:15

Ngày tải lên: 24/12/2013, 17:15

Ngày tải lên: 24/12/2013, 17:15

Ngày tải lên: 20/01/2014, 07:20

Ngày tải lên: 23/08/2012, 11:28

Ngày tải lên: 23/08/2012, 11:28

... Page 70001 Option overview 70010 EJB:A-Diagram1 70010 EJB:A-Diagram2 70010 EJB:A-Diagram3 70010 EJB:A-Overview1 70010 EJB:A-Overview2 70010 PJB:A-Diagram1 70010 PJB:A-Overview 70012 Grounding:A-Diagram1 70012 ... 18 LTRS ORIGINATOR CHECKER ENGR APP MATL APP REVISIONS PRINTED COPIES ARE UNCONTROLLED D 70010 EJB:A-Overview2 2010-08-06 MY: 2010.25 B299A PJ1/70010 EJB:A-Overview2 Released EET1-E-12374539-000 ZCELIK1 PROG:B2e ALL ... 18 LTRS ORIGINATOR CHECKER ENGR APP MATL APP REVISIONS PRINTED COPIES ARE UNCONTROLLED D 70010 EJB:A-Overview2 2010-08-06 MY: 2010.25 B299A PJ1/70010 EJB:A-Overview2 Released EET1-E-12374539-000 ZCELIK1 PROG:B2e ALL...

Ngày tải lên: 23/08/2012, 11:28

Ngày tải lên: 25/08/2012, 10:24

Ngày tải lên: 10/09/2012, 09:46

Ngày tải lên: 15/10/2012, 10:02