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| 型号： | ATREB232ED-EK |
| 厂商： | Atmel |
| 文件页数： | 24/40页 |
| 文件大小： | 0K |
| 描述： | AT86RF232 EVAL KIT |
| 产品培训模块： | AT86RF232 Low Power 2.4 GHz Wireless Transceiver |
| 标准包装： | 1 |
| 类型： | 收发器，微控制器 |
| 频率： | 2.4GHz |
| 适用于相关产品： | AT86RF232 |
| 已供物品： | 4 块板，电池，电缆，文档 |
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Figure 5-15 , page 23 , and Figure 5-16 show the final result as a diagram and on the
board.
Figure 5-16. Antenna tuning with series and shunt capacitor.
In most cases, it is beneficial to tune the antenna a little towards higher frequencies.
The reason is that environmental changes in most cases tune the antenna down to
lower frequencies. Such environmental changes can be any kind of object that is
situated near the antenna, such as a housing or table surface.
The tuning determined in this example is only valid for the antenna example board.
The REB232ED, with its different ground plane design and many more differences,
may have other parts assembled.
5.7.4 Final board antenna radiation pattern
The actual radiation pattern for the final board is rather complicated and very difficult
to describe. Traditional radiation diagrams where the device under test is turned in all
three axes and the received power for a vertical and a horizontal antenna are shown
in a polar diagram do not provide a correct picture. Due to the antenna placement in a
45deg angle, the polarization changes dramatically for such a turn. To see the full RF
power the RX Antenna would require maintaining the correct polarization angel for
such a measurement.
No matter what problems this setup creates when measuring the radiated power,
such a radiation pattern is exactly what is required to reduce fading effects in indoor
24
Atmel AVR2092
8427A-AVR-10/11
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| ATREB233SMAD-EK | 功能描述:射频开发工具 AT86RF233 evaluation kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| ATREB233-XPRO | 功能描述:XPLAINED PRO EXT REB233 制造商:atmel 系列:Xplained Pro 零件状态:有效 类型:收发器 频率:2.4GHz 配套使用产品/相关产品:AT86RF233 所含物品:板 标准包装:1 |
| ATRF231USB-RD | 制造商:Atmel Corporation 功能描述:AT86RF231 AND CORTEXM3 USB STICK - Boxed Product (Development Kits) 制造商:Atmel Corporation 功能描述:AT86RF231 and CortexM3 USB stick |
| ATRF4CE-EK | 功能描述:开发板和工具包 - 无线 RF4CE evaluation kit RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| ATRJ8-FSSR | 制造商:Amphenol Sine Systems 功能描述:RJ PLUG, FIELD SLD STRN RELIEF |
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