Specifications
Table Of Contents
- 最新说明书
- 1.Productoverview
- The HB55_V0.1 is a 2.4GHz 802.11n product. with au
- image sensor interface. with a full 802.11b/g/n au
- for both AP and STA applications.
- 1.1.characteristic
- 1.2.application
- 2.Productspecifications
- 3.2.powerwaste
- 3.3.RFcharacteristics
- 4.Pindefinition
- 6.Referencedesignofexternalantenna
- 8.reflowprofile
- 模块 警告语
6.Referencedesignofexternalantenna
The RF portofBK7252 is ant
DuringPCBlayout, attentionshouldbepaid to:
(1) If the ant is far away from the antenna,
itisrecommendedtoreservetwoπcircuits on PCB to match ant and antenna
respectively;
( 2) WhenPCBlayout, ifPCBspaceconstraintsleadtopowerfilter / crystal oscillator
/ resetcircuitlayoutconflict, itisrecommendedtogivepriorityto
antennalayout;Whenthelayoutofantennaandmoduleiscompact, firstly, the matching
link can be saved;Secondly, the loss of RF signal can be reduced, so as to
improvetheperformanceofairinterface;
(3)
TheRFsignallineshouldbeasshortaspossible. Thecontrolimpedanceis 50R. Both
sides of the wiring are covered with ground and more ground holes are drilled.
The bottom and the bottom of the chip ensure the complete ground plane,
sothattheRFreferencegroundandthechipmainground are well connected.
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