均匀线阵估计DOA介绍了阵列天线模型和波束形成原理

Antenna Fundamentals

Relevant to RFID Applications

by Jeff Shamblin

- Presentation 1: Characteristics of RFID Reader Antennas

-

Presentation 2: Passive RFID Tag Design

- Presentation 3: Passive RFID Link Analysis

Presentation 1 discusses

antenna characteristics for

RFID reader applications

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Presentation 1

Characteristics of RFID Reader Antennas

•

This presentation has been designed to discuss antenna parameters that

are important for antennas used to satisfy transmit and receive functions of

RFID readers

•

To keep the material at an introductory level, only the antenna parameters

deemed relevant for use with RFID readers are discussed

•

The equations used in this presentation are exact for some scenarios and

•

Antennas radiate energy in the form of electromagnetic waves;

electromagnetic waves travel through free space (air is a good

approximation) at the speed of light

•

Frequency, wavelength, and the velocity that the wave travels are related by

a simple equation:

when the wave is traveling in free space

v = c, the speed of light = 2.9979 * 10