Thursday, March 17, 2011
Electromagnetic Waves and Antennas
Preface
This text provides a broad and applications-oriented introduction to electromagnetic waves and antennas. Current interest in these areas is driven by the growth in wireless and fiber-optic communications, information technology, and materials science. Communications, antenna, radar, and microwave engineers must deal with the generation, transmission, and reception of electromagnetic waves. Device engineers working
This text provides a broad and applications-oriented introduction to electromagnetic waves and antennas. Current interest in these areas is driven by the growth in wireless and fiber-optic communications, information technology, and materials science. Communications, antenna, radar, and microwave engineers must deal with the generation, transmission, and reception of electromagnetic waves. Device engineers working
on
ever-smaller integrated circuits and at ever higher frequencies must take into
account
wave
propagation effects at the chip and circuit-board levels. Communication and
computer
network
engineers routinely use waveguiding systems, such as transmission lines
and
optical fibers. Novel recent developments in materials, such as photonic
bandgap
structures,
omnidirectional dielectric mirrors, and birefringent multilayer films, promise
a
revolution in the control and manipulation of light. These are just some
examples of
topics
discussed in this book. The text is organized around three main topic areas:
• The propagation, reflection, and transmission of
plane waves, and the analysis
and
design of multilayer films.
• Waveguides, transmission lines, impedance matching,
and S-parameters.
• Linear and aperture antennas, scalar and vector
diffraction theory, antenna array
design,
and coupled antennas.
The
text emphasizes connections to other subjects. For example, the mathematical
techniques
for analyzing wave propagation in multilayer structures and the design of
multilayer
optical filters are the same as those used in digital signal processing, such
as
the lattice structures of linear prediction, the analysis and synthesis of
speech, and
geophysical
signal processing. Similarly, antenna array design is related to the problem
of
spectral analysis of sinusoids and to digital filter design, and Butler beams
are
equivalent
to the FFT.
Bài giảng chi tiết Lý thuyết và kỹ thuật Anten
1. MUC LUC
Chương 1 Các nguồn bức xạ nguyên tố 2
1.1 Quá trình vật lý của sự bức xạ sóng điện từ của anten
1.2 Đipol điện
1.3 Đipol từ
1.4 Nguyên tố bức xạ hỗn hợp
Chương 2 Lý thuyết anten chấn tử 9
2.1 Phân bố dòng, áp trên chấn tử đối xứng
2.2 Đặc tính hướng của anten chấn tử
- Độ rộng búp sóng
- Hệ số định hướng
2.3 Các tham số của anten chấn tử
- Điện trở bức xạ
- Trở kháng vào
- Độ dài hiệu dụng
Bài giảng chi tiết Trường điện từ và truyền sóng
Chương 1 TRƯỜNG ĐIỆN TỪ
Chương 2 SÓNG ĐIỆN TỪ PHẲNG
Chương 3 NHỮNG VẤN ĐỀ CHUNG VỀ TRUYỀN SÓNG
Tuesday, March 15, 2011
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