Fabrication and Application of Microwave Dielectric Ceramics

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• Fabrication and Application of Microwave
  Dielectric Ceramics
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• NCT?????
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• ????(e?)
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• ????(Q)
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• (tand1/Q,tand?????,?Q?,tand?)
• ??????(t?)
• ???????????????? t? ?????????,????????(20ppm/?)

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??????-NCT

• ????Nd(Co1/2 Ti1/2)O3
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• 1/2Nd2O31/2CoO1/2TiO2?Nd(Co1/2 Ti1/2)O3
• ????????ZnO???????,???????????ZnO??????????????
• (Doping ?? 0.5wt , 1wt , 2wt)

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????-NCT
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• ???????1.9GHZ??(????)
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????-FR4(A series??GAP??)
S11
?1.875GHZ
??mil
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????-FR4 (B series???????)
S11
1.879GHZ
??mil
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????-FR4 (??GAP??)
S11
??mil
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????-FR4 (P series???????)
S11
1.891GHZ -23.94dB?
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P6?SMITH CHART
? ?
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• ?A series?B series??GAP????????????,?????
• C1?D1????GAP?L???Lose???????????(??)?
• A2?B1??? ??B1??????,??GAP?W???????
• P series ?????GAP???,??GAP????,?W30,L450???lose?
  ,???SMITH CHART??P6?????,???P6???(??mil)

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????-NCT
S11
1.889GHZ -24.04dB?
??mm
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NCT-SMITH CHART
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?????11.25?
2000mil?50.3mm
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NCT???
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S11
?f4.2MHZ ? _____
-21.484dB?
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