天线选型指南.pdf

ZHCA0701????AN058PCB Antenna Chip Antenna Whip Antenna ?????? Audun Andersen?????????????????•••••????????2.4GHz868/915MHz•••••1?????????????????(SRD)????? ??????????????????????? ??????????????????????? ?????????????????????????????? ???????????EM?????????? ?????????????????1.???????ZHCA0702????AN058???????1 1??1 2??2 3????3 3.1PCB??4 3.2CHIP??4 3.3WHIP??4 4????4 4.1??????5 4.2???????9 4.3??????10 5? 5.12.4GHz 50Hz?????????12 5.22.4GHz????????14 5.3868/915MHz??????15 6??????16 6.1????16 6.2EM????16 6.3?????????16 7??17 8???19 8.1????192??AN?????Application Note? CW???Carrier Wave? DB????Demonstration Board? DN?????Design Note? DUT?????Device UnderTest? EIRP?????Effective Isotropic Radiated Power? EM????electronic Magnetic? EM?????Evaluation Module? IFA??F????Inverted F Antenna? ISM?????????Industrial?Scientific?Medical? LOS???? ?Line Sight? MIFA???F????Meandered Inverted F Antenna? PCB??????Printed Circuit board? RF??????Radio Frequency? SRD?????Short Range Device? TI?????Texas Instruments? VSWR??????Voltage Standing Wave Ratio?ZHCA0703????AN058Single Ended AntennaDifferential Antenna 3???????????????????????????????????????????????????? ???????????????????PCB??????????????????????????? ?????????????????PCB????? ???????? ????????????•••?????????PCB?? ??????????••???????•???? ????••???????•??? ??????????••?1.??????????????????????????????????????????????????????????? ??????????????????????????50?????????????50?????? ??????????????????50???????????????????????????? ????????????????????????????2??????????????????? ???????RF??????????????????????2.????????ZHCA0704????AN058?????????????????2.4-2.4835GHz??????863-870MHz??????902-928??? ??????????868MHz???,?????????915MHz?????????????????? ???????????????????868MHz???915MHz?????????????????? ??868/915MHz????3.1 PCB??????PCB?????????????????????????????????????????? ??????????????????????????????????????????????? ??????????????????????????????????????????????? ???4?????????????3.2??????????????????????????????????????????????????1GHz?????????PCB?????????????BOM????????????????0.1-1.0 ???????????????????????????50???????????????????? ???????????????????????????????????????????????? ????????????????????????????????PCB?????????????? ???????3.3 ???????????????????????????????????????????????????? ???????????????????????????????????????????????? ???????????????????????????????????????????????? ???????SRD???????????SRD?????????????001[1]?????032[2]?4??????????????????????????????????????????????????? ??????????????????????????????????4.1?4.2?????????? ????????????PCB??????????????????????????????????4.3??????ZHCA0705????AN058avginradinrad UU PPDPPDeGmax??????4.1???????3?????1???PCB??????????????????????????????????? ???????3???????????3??????????????????????????? ?????3.?????????????????????????????????????????????????dBi ???????????????Effective Isotropic Radiated?????3????5.6dBi?????3??? ?4dB/div?????????????????4dB????????1??PCB????????????0?????5.6bB???????180?????6.4dB????????1.????????G??????????????????????????1????????????????? ????????????????????????????D??????????????????? ???????????????????????????????????????????????? ???????????????????????????????????????????????? ????????????????????????ZHCA0706????AN058?22D?fR???????????????????????????????????????????????? ???????????????????????????????????????????????? ????????????????????????????????????SRD?????????? ???????????????????????????????????????????????? ????????????Line of Sight?????????????????????????????? ???????????????????????????????????????????????? ???????????????????????????????????????????????? ????????????????????????????????????????DUT???????????????????????????????? ????????????????????????????????????????????Rf??? ?????????????D???????2.?????????????????????????? ????????2.??????????????????????????????????????????XY?XZ?YZ???? ???3D?????????????????????????????????????????? ????????????????????????????????=90???=0???=90???4? ?????????????????????????????????????0???X??????? ??XY?????Y???????XZ???0???Z?????????X???????YZ???0??Z ??????????Y?????4.??????ZHCA0707????AN058?????????????????5????????????????????????????SmartRF04EB?????????5????????????????????????SmartRF04EB?? ???????????????????????????????????????????????? ???-1.2dB?4.6dB???????SRD????????????????????????????? ????????????????????????????????ZHCA0708????AN058CC1100EM PCB Antenna in SmartRF04EB CC1100EM PCB Antenna without SmartRF04EB Vertical Polarization, YZ plane 0 dBm, 868 MHz 2 dB/div Ref Lev: 4.6 dBVertical Polarization, YZ plane 0 dBm, 868 MHz 2 dB/div Ref Lev: -1.2 dB?5.???????????????ZHCA0709????AN0584.2?????????????????????????????????????????????????????? ???????6?????2.4GHz????????????????2.4GHz???????????? ?2dB????????????????????????????????2.3GHz?2.8GHz????? ???????????????????????????????????????????????? ???????????????????????????????????????????????? ???????????????????????????????????????????????? ???。