전자부품 데이터시트 검색엔진
Selected language     Korean  ▼
부품명
         상세내용
Preview PDF Download HTML-1page HTML-10pages

KTX2-433 데이터시트(Datasheet) 6 Page - Radiometrix Ltd

부품명 KTX2-433
상세내용  UHF FM Code-Hopping Data Transmitter Module
PDF  8 Pages
Scroll/Zoom Zoom In 100% Zoom Out
제조사  RADIOMETRIX [Radiometrix Ltd]
홈페이지  http://www.radiometrix.com
Logo 

   
 6 page
background image
Radiometrix Ltd, KTX2 Data Sheet
page 6
Antenna requirements
Three types of integral antenna are recommended and approved for use with the module:
A. Helical antenna
B. Loop antenna
RF
C1
C2
C4
C3
RF-GND
C. Whip antenna
16.4cm
RF
0.5 mm enameled copper wire
close wound on 3.2 mm diameter former
433 MHz = 24 turns
Feed point 15% to 25% of total loop length
track width = 1mm
4 to 10 cm inside area
wire, rod, PCB-track or a combination
of these three
433 MHz = 16.4 cm total from RF pin.
2
RF
A
B
C
helical
loop
whip
Ultimate performance
**
*
***
Easy of design set-up
**
*
***
Size
***
**
*
Immunity proximity effects
**
***
*
Range open ground to similar antenna
(for KTX2-433 & RX2A-433-10)
200m
100m
300m
A) Helical
Wire coil, connected directly to pin 2, open circuit at other end. This
antenna
is
very
efficient given it's small size (20mm x 4mm dia.). The helical is a high Q antenna, trim the
wire length or expand the coil for optimum results. The helical de-tunes badly with
proximity to other conductive objects.
B) Loop
A loop of PCB track tuned by a fixed or variable capacitor to ground at the 'hot' end and fed
from pin 2 at a point 20% from the ground end. Loops have high immunity to proximity de-
tuning.
C) Whip
This is a wire, rod, PCB track or combination connected directly to pin 2 of the module.
Optimum total length is 15.5cm (1/4 wave @ 433MHz). Keep the open circuit (hot) end well
away from metal components to prevent serious de-tuning. Whips are ground plane
sensitive and will benefit from internal 1/4 wave earthed radial(s) if the product is small
and plastic cased
The antenna choice and position directly controls the system range. Keep it clear of other metal in the
system, particularly the 'hot' end. The best position by far, is sticking out the top of the product. This is
often not desirable for practical/ergonomic reasons thus a compromise may need to be reached. If an
internal antenna must be used try to keep it away from other metal components, particularly large ones
like transformers, batteries and PCB tracks/earth plane. The space around the antenna is as important as
the antenna itself.
Fig.5: Antenna configuration
Antenna selection chart




Html 페이지

1  2  3  4  5  6  7  8 


데이터시트



관련 부품명

부품명상세내용Html View제조사
TX2A-433-64UHF FM Data Transmitter and Receiver Modules 1 2 3 4 5 MoreRadiometrix Ltd
BIM-UHFLow Power UHF Data Transceiver Module 1 2 3 4 5 MoreRadiometrix Ltd
TX3A-869-64UHF FM Data Transmitter and Receiver Modules 1 2 3 4 5 MoreRadiometrix Ltd
CDP-02UHF FM-NARROW BAND SYNTHESIZED RADIO DATA MODULE 1 2 3 4 5 MoreList of Unclassifed Manufacturers
TX2-433-40-5VUHF FM Data Transmitter and Receiver Modules 1 2 3 4 5 MoreRadiometrix Ltd
MC33696PLL Tuned UHF Transceiver for Data Transfer Applications 1 2 3 4 5 MoreFreescale Semiconductor, Inc
TDL2A-433-9UHF Multi Channel Transparent Data Link Transceiver 1 2 3 4 5 MoreRadiometrix Ltd
MRX-005SUHF AM RECEIVER MODULE 1 2 3 4 5 MoreList of Unclassifed Manufacturers
S-AU82AHRF POWER AMPLIFIER MODULE FM RF POWER AMPLIFIER MODULE FOR 60-W COMMERCIAL UHF RADIO APPLICATIONS 1 2 3 4 5 Toshiba Semiconductor

링크 URL

ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ]  

Alldatasheet는?   |   광고문의    |   운영자에게 연락하기   |   개인정보취급방침   |   즐겨찾기   |   링크교환   |   제조사별 검색
All Rights Reserved© Alldatasheet.com 2003 - 2017    


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl