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參數(shù)資料
| 型號： | QFMT1-434 |
| 英文描述： | TRANSMITTER SIL 433MHZ |
| 中文描述： | 南港島433MHz頻段發(fā)射機(jī) |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 51K |
| 代理商： | QFMT1-434 |
QM Transmitter Module
QFMT1-XXX
QFMT1 rev 1.3 May 00
Reg No 3678152
Page 4
Application Information
Antenna Design
The design and positioning of the antenna is as
crucial as the module performance itself in
achieving a good wireless system range. The
following will assist the designer in maximising
system performance.
The antenna should be kept as far away from
sources of electrical interference as physically
possible. If necessary, additional power line
decoupling capacitors should be placed close to
the module.
The antenna ‘hot end’ should be kept clear of any
objects, especially any metal as this can severely
restrict the efficiency of the antenna to receive
power. Any earth planes restricting the radiation
path to the antenna will also have the same effect.
Best range is achieved with either a straight piece
of wire, rod or PCB track @ wavelength
(15.5cm @ 433.92MHz). Further range may be
achieved if the wave antenna is placed
perpendicular in the middle of a solid earth plane
measuring at least 16cm radius. In this case, the
antenna should be connected to the module via
some 50 ohm characteristic impedance coax
RF
RF
Helical Antenna
Whip Antenna
34mm @ 433MHz
17 turns equally spaced
= 5mm (inside)
15.5cm @ 433MHz
Figure 2: Antenna Configurations To Be Used
With The Quasar QM Transmitter Module
Application Circuit
The application circuit shows how the Quasar QM
transmitter can easily be integrated into a system
to form a wireless link.
Quasar
1
2
A0
A1
A2
A3
A4
A5
A6
A7
VSS
AD8
AD9
AD10
AD11
TE\
OSC2
OSC1
DOUT
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
HT12E
R
OSC
+5V
4
5
3
+5V
ANTENNA
Figure 3: Quasar QM Transmitter Application
Circuit
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| QFMT1-434 | 制造商:QUASAR 功能描述:TRANSMITTER SIL 433MHZ |
| QFMT1-868 | 制造商:RFSOLUTIONS 制造商全稱:rfsolutions.ltd 功能描述:QM Radio Transmitter Module |
| QFMT1-916 | 制造商:RFSOLUTIONS 制造商全稱:rfsolutions.ltd 功能描述:QM Radio Transmitter Module |
| QFMT1-XXX | 制造商:RFSOLUTIONS 制造商全稱:rfsolutions.ltd 功能描述:QM Radio Transmitter Module |
| QFMT5-433 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FM TRANSMITTER MODULE 433 |
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