Tài liệu Làm bánh táo bằng lò vi sóng chỉ trong 10'''''''' ppt

... vào trộn cùng bột nhé! Bước 5: - Rải đều bột đã trộn lên táo rùi cho bánh vào lò, vi sóng trong khoảng 8' là được. Bánh táo kiểu này ăn với kem tươi là thích nhất các bạn ạ! ... Cứ để bánh trong tủ lạnh, đến khi nào ăn thì lấy ra và rưới kem tươi lên nha! Sẽ rất thơm và ngậy

Ngày tải lên: 23/12/2013, 18:15

... 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 monochro...

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 vi...

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 int...

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 cas...

Ngày tải lên: 15/12/2013, 11:15

... re¯ection coef®cient of 0.2 is acceptable, circuits (iii) and (iv) can provide much wider bandwidth in comparison with those of the previous example. This concept can be used to shape the re¯ection coef®cient ... between them. This device can be inserted at a convenient point before the load. The impedance is matched by adjusting the lengths of the two stubs. Of course, it does not provide a...

Ngày tải lên: 15/12/2013, 11:15

... characteristic impedance versus normalized length of the taper. This design can be achieved by moving the zeros at u Æ1 and Æ4 into the points Æ2 and Æ3, respectively. Hence, QuCu 2 À 2 2  2 u 2 À ... Hence, G in   L 0 dG in  1 2  L 0 e Àj2bz d dz ln  Zdz 6:7:3 Therefore, G in can be determined from (6.7.3) provided that  Zz is given. However, the synthesis problem is a bit...

Ngày tải lên: 15/12/2013, 11:15

... Z o2 Z 2  Z o2  b 2 a 2 7:6:22 Dividing (7.6.17) by a 1 and then using (7.6.21), we ®nd b 1 a 1  G 1  Z 1 À Z o1 Z 1  Z o1  S 11  S 12 a 2 a 1  7:6:23 Now, dividing (7.6.18) by a 2 and then ... jb, the network becomes lossless. In that case, S 11 S 12 S 21 S 22 !  0 e Àjb` e Àjb` 0 ! Obviously, it is a unitary matrix now. Example 7.19: Find scattering parameters of the two-por...

Ngày tải lên: 24/12/2013, 17:15

... devise some way to control its attenuation around the cutoff. Expression for the propagation constant of a T-section is listed in Table 8.1. In order to ®nd g of this T-section, we ®rst divide ... two-port network. Filters have been designed using active devices such as transistors and operational ampli®ers, as well as with only passive devices (inductors and capacitors only). Therefore, thes...

Ngày tải lên: 24/12/2013, 17:15

... SIGNAL-FLOW GRAPH REPRESENTATION OF A PASSIVE SINGLE-PORT DEVICE Consider load impedance Z L as shown in Figure 9.18. It is a single-port device with port voltage and current V L and I L ,respectively. ...  Z S Z o  V ref S  E S À 1À Z S Z o  V in S or, V ref S  Z o Z o  Z S E S À Z o À Z S Z o  Z S V in S Dividing it by  2Z o p ,we ®nd that V ref S  2Z o p  Z o Z o ...

Ngày tải lên: 24/12/2013, 17:15