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| 型号： | RXM-418-LR_ |
| 厂商： | Linx Technologies Inc |
| 文件页数： | 32/40页 |
| 文件大小： | 0K |
| 描述： | RECEIVER 418MHZ LR SERIES |
| 标准包装： | 25 |
| 系列： | LR |
| 频率： | 418MHz |
| 灵敏度： | -112dBm |
| 数据传输率 - 最大： | 10 kbps |
| 调制或协议： | ASK，OOK |
| 应用： | ISM，车库门开启器，RKE |
| 电流 - 接收： | 5mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 特点： | 远程 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | -40°C ~ 70°C |
| 封装/外壳： | 16-SMD 模块 |
| 包装： | 管件 |
| 其它名称： | RXM-418-LR RXM-418-LR-S |
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General Antenna Rules
The following general rules should help in maximizing antenna
performance.
1. Proximity to objects such as a user’s hand, body, or metal objects will
cause an antenna to detune. For this reason, the antenna shaft and tip
should be positioned as far away from such objects as possible.
2. Optimum performance will be obtained from a quarter or half-wave
straight whip mounted at a right angle to the ground plane. In many
cases, this isn’t desirable for practical or ergonomic reasons, thus,
an alternative antenna style such as a helical, loop, or patch may be
utilized and the corresponding sacrifice in performance accepted.
OPTIMUM
USABLE
NOT RECOMMENDED
3. If an internal antenna is to be used, keep it away from other metal
tracks, and ground planes. In many GROUND PLANE space around the
(MAY BE NEEDED)
Figure 28: Ground Plane Orientation
CASE
components, particularly large items like transformers, batteries, PCB
NUT
antenna is as important as the antenna itself. Objects in close proximity
to the antenna can cause direct detuning, while those farther away will
alter the antenna’s symmetry.
4. In many antenna designs, particularly
?-wave whips, the ground plane acts as a
VERTICAL λ /4 GROUNDED
ANTENNA (MARCONI)
counterpoise, forming, in essence, a half-
wave dipole. For this reason, adequate
ground plane area is essential. The ground
plane can be a metal case or ground-fill
areas on a circuit board. Ideally, it should
have a surface area > the overall length
of the half-wave radiating element. This is
often not practical due to size and configu-
ration constraints. In these instances, a
E
I
GROUND
PLANE
VIRTUAL λ /4
DIPOLE
DIPOLE
ELEMENT
λ /4
λ /4
designer must make the best use of the
– 28 –
Figure 29: Dipole Antenna
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| RXM-418-LR_ | 功能描述:RECEIVER 418MHZ LR SERIES RoHS:是 类别:RF/IF 和 RFID >> RF 接收器 系列:LR 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 09/Jan/2012 标准包装:50 系列:* 频率:850MHz ~ 2.175GHz 灵敏度:- 数据传输率 - 最大:- 调制或协议:- 应用:* 电流 - 接收:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 特点:- 电源电压:4.75 V ~ 5.25 V 工作温度:0°C ~ 85°C 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| RXM-418-RM | 功能描述:RECEIVER RF 418MHZ RoHS:否 类别:RF/IF 和 RFID >> RF 接收器 系列:RM 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 09/Jan/2012 标准包装:50 系列:* 频率:850MHz ~ 2.175GHz 灵敏度:- 数据传输率 - 最大:- 调制或协议:- 应用:* 电流 - 接收:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 特点:- 电源电压:4.75 V ~ 5.25 V 工作温度:0°C ~ 85°C 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| RXM430-408 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| RXM-433-LC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:LC SERIES TRANSMITTER MODULE |
| RXM-433-LC-P | 制造商:未知厂家 制造商全称:未知厂家 功能描述:LC SERIES RECEIVER MODULE DATA |
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