cách sử dụng lò vi sóng sanyo em g206as

Ngày tải lên: 28/08/2013, 18:19

... - 10:06 AM Lò nấu vi sóng Lò Vi sóng (Microwave oven - sóng cực ngắn) hiện nay đã ngự trị trong bếp của nhiều gia đình cũng như tại công sở, trường học…. Dân giầu có thì sắm một lò gắn vào tường ... cần lưu ý là lò vi sóng hiện nay rất an toàn cho người mang máy điều hòa nhịp tim (pacemaker) vì các y cụ này đều được che chở chống phóng xạ hoặc vi sóng. © Copyright 2000-2003 Vinacomm, all ... học, lò cũng có những rủi ro, bất lợi. Xin cùng tìm hiểu thêm về bếp nấu hiện đại này. KHCN Số 4 giới thiệu cùng bạn đọc về lịch sử ra đời lò vi sóng, những ưu khuyết điểm của nó, cũng như cách...

Ngày tải lên: 17/09/2013, 20:10

... chỉ dẫn của nhà sản xuất) có thể sử dụng trong lò vi sóng. HÃy để lót tay ở chỗ thuận tiện. Mặc dù những đồ đựng an toàn với sóng vi ba, không bị năng lợng vi ba làm nóng lên nhng lại bị thức ... đông, lò vi sóng sẽ tự chọn thời gian rà đông, chế độ năng lợng phù hợp. Trang 3: Chuyển đổi công thức nấu ăn Microwave Cooking: Tất cả các công thức nấu ăn cho lò vi sóng đợc vi t dùng cho lò có ... chạm khắc, đĩa mêlamin. Vật liệu lý tởng cho nấu ăn trong lò vi sóng là vật liệu trong suốt đối với sóng vi ba. Nó phải cho phép sóng vi ba xuyên qua, làm nóng thực phẩm. Thuỷ tinh chịu nhiệt,...

Ngày tải lên: 20/01/2014, 07:20

Ngày tải lên: 07/03/2014, 17:20

Ngày tải lên: 19/06/2014, 11:20

Ngày tải lên: 07/08/2014, 08:09

... meet the stringent requirements of RF/microwave systems, particularly wireless communications systems. 4 INTRODUCTION prototype filters and elements, frequency and element transformations, immittance (impedance/admittance) ... microwave integrated circuit (MMIC), microelectromechanic system (MEMS), micromachining, high-temperature superconductor (HTS), and low-tem- perature cofired ceramics (LTCC), has stimulated the rapid ... materials/struc- tures, and low-temperature cofired ceramics (LTCC). INTRODUCTION 3 Microstrip Filters Computer-aided design High-temperature superconductor MEMS Micromachining Hybrid/monolithic...

Ngày tải lên: 24/10/2013, 16:15

... number of elements possessed by each. In filter design, equivalent networks or circuits are often used to transform a network or circuit into another one that can be easier realized or implemented ... [U] denote the zero matrix and unity matrix respectively . Combine the two systems of equations in (2.51b) into one giving ΄΅ = ΄΅ · ΄΅ (2.53) From (2.53) we can have ΄΅ = ΄΅ · ΄΅ + ΄΅ · ΄΅ (2.54a) ΄΅ = ... can be used for single- mode networks as well. A demonstration of applying the scattering transmission matrix to microstrip discontinuity problems can be found in [10]. [aЉ] 2 [bЉ] 2 [TЉ] 12 [TЉ] 22 [TЉ] 11 [TЉ] 21 [TЈ] 12 [TЈ] 22 [TЈ] 11 [TЈ] 21 [bЈ] 1 [aЈ] 1 [bЉ] 1 [aЉ] 1 [aЈ] 2 [bЈ] 2 [a] 2 [b] 2 [T] 12 [T] 22 [T] 11 [T] 21 [b] 1 [a] 1 2.12...

Ngày tải lên: 24/10/2013, 16:15

... lowpass prototype filters and elements, frequency and element transformations, immittance inverters, Richards’ transformation, and Kuroda identities for distributed elements. Dissipation and unloaded ... pole Butterworth lowpass prototype as that used previously in Section 3.3.1, Figure 3.15(b) illustrates a bandpass having a passband from 1 to 2 GHz obtained using the element transformation. 3.3.4 Bandstop ... the cutoff fre- quency and element values of the lowpass prototypes, as discussed previously in this chapter, and Q ui are the unloaded quality factors of microwave elements corre- sponding to g i ,...

Ngày tải lên: 28/10/2013, 23:15

... previous expressions for ␧ re are obtained based on the quasi-TEM or quasistatic approximation, and therefore are rigorous only with DC. At low microwave frequencies, these expressions provide ... support a pure TEM wave. This is because that a pure TEM wave has only transverse components, and its propagation velocity depends only on the material properties, namely the permittivity ␧ and ... x/R for a lossy reactance element and Q Y = B/G for a lossy susceptance element, it can be shown that the total Q-factor (1/Q = 1/Q Z + 1/Q Y ) of the short-line elements is estimated by Q = (4.54) where...

Ngày tải lên: 28/10/2013, 23:15

... FILTERS 137 5.1.3 Semilumped Lowpass Filters Having Finite-Frequency Attenuation Poles The previous two types of microstrip lowpass filter realize the lowpass prototype filters having their frequencies ... ␧ r = 10.8 and a thickness h = 1.27 mm. To emphasize and demonstrate that the mi- crostrip realization in Figure 5.5(b) can only approximate the ideal lumped-element filter in Figure 5.5(a), two microstrip ... for EM simulation, where arrows indicate the reference planes for de- embedding to obtain the two-port parameters of the microstrip gap. Assume that the two-port parameters obtained by the EM...

Ngày tải lên: 07/11/2013, 21:15

... stub zЈ 3 and unit element z U2 , to stub z L2 and unit element z U1 , to stub z L1 and unit element z Ј A , to stub zЈ 5 and unit element z U6 , and to stub z L6 and unit element z Ј B in Figure ... the EM simulation. The EM simulated performance of the filter is shown in Figure 6.13(b). 6.2.3 Optimum Bandstop Filters With the design method discussed in the last section, the unit elements ... FILTERS ductive element in the lowpass prototype filter is transformed to a series capacitive element in the highpass filter, with a capacitance C i = (6.2) Likewise, any shunt capacitive element in the...

Ngày tải lên: 07/11/2013, 21:15

... FILTERS 7.3.1 MEMS and Micromachining Microelectromechanical systems (MEMS) provide a class of new devices and com- ponents which display superior high-frequency performance and enable new system capabilities. ... the HTS material viewpoint, is to increase the critical current density J c by improving the material or to operate the filter at a lower temperature; J c will increase as the temperature is decreased. ... switching. Many new systems con- cepts will appear as high-performance materials emerge; these systems will have considerably improved performance over conventional systems. Ferroelectric tunable...

Ngày tải lên: 07/11/2013, 21:15

... were obtained using a specific com- mercial full-wave EM simulator [14], any other full-wave EM simulator, or in fact experimental measurement, should produce similar results. 8.5.1 Extracting ... of S 11 in (8.76) is always equal to 1. This is because in the vicinity of resonance, the parallel res- onator of Figure 8.11 behavior likes an open circuit. However, the phase response of S 11 changes ... these two coupling spacings are again evidence that the resultant coupling coefficients have the opposite signs. 8.5.2 Extracting k (Asynchronous tuning) To demonstrate extracting coupling coefficients...

Ngày tải lên: 15/12/2013, 06:15

... Product (all trademarks) Type HP-EEsof ADS Integrated package Momentum 3D planar EM simulation HFSS 3D EM simulator Sonnet Software em 3D planar EM simulation xgeom Layout entry emvu Current display Applied ... capacitor. The EM simulation for individual sections and for a complete filter is done using em [21], which requires uniform grid sizes. A grid size of 2 mil × 2 mil is used in in- dividual section EM simulation ... 3D planar EM simulator, optimizers) Ansoft Ansoft HFSS 3D EM simulation Ensemble Planar EM simulator Harmonica Linear and nonlinear simulation Zeland Software IE3D Planar and 3D EM simulation...

Ngày tải lên: 15/12/2013, 06:15

... the improvement in selectivity over the Chebyshev filter is evident. The closer the atten- uation poles to the cut-off frequency (⍀ = 1), the sharper the filter skirt and the higher the selectivity. ⍀ a FBW ... requirements, especially the se- lectivity, can allow deterioration in the phase performance at the edges of the pass- band. In many high-capacity communication systems, phase linearity requirements over ... tunable by a single element in the network. Since the location of this type of transmission zero is very sensitive, from a practical viewpoint, it would be desirable to extract them from either above...

Ngày tải lên: 15/12/2013, 06:15

... without the via hole grounding. Thus, it would seem that the voltage and current distributions would not change much in the vicinity of the midband fre- quency, even though the via holes are removed. ... Circuit topology of tubular lumped-element bandpass filter. FIGURE 11.36 Microstrip realization of tubular lumped-element bandpass filter. onators, it would seem that the pseudointerdigital coupling ... interdigital bandpass filter. For a demonstration, a conventional in- terdigital filter structure is schematically shown in Figure 11.6(a). Each resonator element is a quarter-wavelength long at...

Ngày tải lên: 15/12/2013, 06:15

... stations vary but may focus on increasing sensitivity and selectivity: ț Sensitivity—The benefits of increasing sensitivity in rural areas is obvious since the number of mobile base stations and ... in both the sensitivity and selectivity due to extremely low losses in the materials (see Chapter 7 for details). The subsystem developed is for a Digital Communication System or DCS-1800 base ... coupler [15–17]. However, it provides very little design margin due to its limited bandwidth. Therefore, it was chosen to use tandem couplers [18]. A tandem arrangement of two coupled-line di- rectional...

Ngày tải lên: 15/12/2013, 06:15

Ngày tải lên: 22/06/2014, 06:20

Ngày tải lên: 10/07/2014, 14:20