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发表于 2007-8-21 23:31:39
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Compact Integrated Antennas
Designs and Applications for the MC1319x, MC1320x, and MC1321x
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Antenna Terms . . . . . . . . . . . . . . . . . . . . . . . . 2
3 Basic Antenna Theory . . . . . . . . . . . . . . . . . . 2
4 Impedance Matching . . . . . . . . . . . . . . . . . . . 6
5 Miniaturization Trade-offs . . . . . . . . . . . . . . 12
6 Potential Issues . . . . . . . . . . . . . . . . . . . . . . 13
7 Recommended Antenna Designs . . . . . . . . 14
8 Design Examples . . . . . . . . . . . . . . . . . . . . . 15
1 Introduction
Good antenna design is a critical factor in obtaining good
range and stable throughput in a wireless application.
This is especially true in low power and compact designs
where antenna space is less than optimal. However,
several compact, cost efficient, and effective options
exist for implementing integrated antennas.
To obtain the desired performance, it is required that
users have at least a basic knowledge about how
antennas function and the design parameters involved.
These parameters include selecting the correct antenna,
antenna tuning, matching, gain/loss, and knowing the
required radiation pattern.
This note will help users understand antenna basics, and
aid in selecting the correct antenna solution........ |
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IP卡
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提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡