<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-27</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000919583</issuerCik><issuerName>CELERITEK INC/CA</issuerName>        <issuerTradingSymbol>CLTK</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001223765</rptOwnerCik><rptOwnerName>TARGOFF MICHAEL B</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>1330 AVENUE OF THE AMERICAS, 36TH FLOOR</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>NEW YORK</rptOwnerCity><rptOwnerState>NY</rptOwnerState><rptOwnerZipCode>10019</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Director stock option (right to buy)</value><footnoteId id="F1" /></securityTitle><conversionOrExercisePrice><value>7.33</value></conversionOrExercisePrice><transactionDate><value>2003-08-27</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>10000</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-08-27</value></exerciseDate><expirationDate><value>2013-08-27</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>10000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>10000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Grant to reporting person of option to buy 10,000 shares of Common Stock under the Celeritek, Inc. Outside Directors' Stock Option Plan.  The option becomes excercisable as to 100% on August 27, 2004.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>MAGARET E. SMITH</signatureName><signatureDate>2003-08-29</signatureDate></ownerSignature></ownershipDocument>

