cách sử dụng lò vi sóng sanyo em g206as
Sử dụng lò vi sóng
Ngày tải lên :
17/09/2013, 20:10
... - 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...
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Tài liệu Một số vấn đề về lò vi sóng và sử dụng lò vi sóng pptx
Ngày tải lên :
20/01/2014, 07:20
... 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,...
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Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P1)
Ngày tải lên :
24/10/2013, 16:15
... 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...
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Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P2)
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...
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Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P3)
Ngày tải lên :
28/10/2013, 23:15
... 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
,...
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Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P4)
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...
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Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P5)
Ngày tải lên :
07/11/2013, 21:15
... 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...
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Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P6)
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...
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Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P7)
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...
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Tài liệu Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P8) doc
Ngày tải lên :
15/12/2013, 06:15
... 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...
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Tài liệu Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P9) doc
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...
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Tài liệu Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P10) pptx
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...
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Tài liệu Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P11) ppt
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...
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Tài liệu Microstrip bộ lọc cho các ứng dụng lò vi sóng RF (P12) pptx
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...
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