- 您现在的位置：买卖IC网 > Datasheet目录396 > ATREB232ED-EK (Atmel)AT86RF232 EVAL KIT Datasheet资料下载
参数资料
| 型号： | ATREB232ED-EK |
| 厂商： | Atmel |
| 文件页数： | 18/40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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
large metal plate. The graph shows receive signal strength variations caused by the
interference of reflected waves reaching the receiver via different propagation paths.
From Figure 5-10 , page 19 one can conclude key parameters for such an indoor
scenario:
1. For one antenna, multipath fades can exceed 30dB.
2. For the 2.4GHz ISM band, a local fading minimum is typically below 5cm (~2in).
This number is expected considering the wavelength. Conclusion: an antenna
diversity design should place antennas at a distance larger than that.
3. For almost all positions, only one antenna is in a deep fade. The setup prepared
for this test demonstrates the advantage of using antenna diversity.
Figure 5-9. Coupling between left and right antennas.
If practical situations are further analyzed (see Figure 5-10 , page 19 ), one can derive
a practical “antenna gain” for the diversity setups. To ensure robust and reliable
communication, a single antenna system has to consider at least a 30dB link margin
as fade margin.
Considering the multipath setup used for the experiment, a signal level of -70dBm is
the worst case receiver signal strength when operating on antenna diversity. A single
antenna system could get into a spot where the receive power is as low as -85dBm.
It might be too optimistic in an indoor environment to take the 15dB and state that an
antenna diversity system has four times the range compared to a non-antenna
diversity system. But antenna diversity cuts deep fades and strongly increases the
stability of a radio link. This is essential for radio nodes that get installed in a fixed
position, as with wall mounted equipment. The location of deep fades can move over
time due to small changes inside the room or building as there are doors, windows,
furniture, and people that may move.
18
Atmel AVR2092
8427A-AVR-10/11
相关PDF资料 |
PDF描述 |
|---|---|
| ATZB-900-B0 | KIT MOD 802.15.4/ZIGB 900MHZ RF |
| AUIRF7640S2TR1 | MOSFET N-CH 60V 77A DIRECTFET-S2 |
| AUIRF7665S2TR1 | MOSFET N-CH 100V 77A DIRECTFET2 |
| AUIRFR120ZTR | MOSFET N-CH 100V 8.7A DPAK |
| AUIRFR4105ZTR | MOSFET N-CH 55V 30A DPAK |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
发布紧急采购，3分钟左右您将得到回复。