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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 cM/00SL+bOI+0PZGI+6Yow==

<SEC-DOCUMENT>0001099188-04-000001.txt : 20040130
<SEC-HEADER>0001099188-04-000001.hdr.sgml : 20040130
<ACCEPTANCE-DATETIME>20040130171649
ACCESSION NUMBER:		0001099188-04-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040128
FILED AS OF DATE:		20040130

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WJ COMMUNICATIONS INC
		CENTRAL INDEX KEY:			0000105006
		STANDARD INDUSTRIAL CLASSIFICATION:	SPECIAL INDUSTRY MACHINERY, NEC [3559]
		IRS NUMBER:				941402710
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		401 RIVER OAKS PARKWAY
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95134
		BUSINESS PHONE:		408-577-6200

	MAIL ADDRESS:	
		STREET 1:		401 RIVER OAKS PARKWAY
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95134

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WATKINS JOHNSON CO
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PAINE W DEXTER III
		CENTRAL INDEX KEY:			0001099188
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31337
		FILM NUMBER:		04556764

	BUSINESS ADDRESS:	
		STREET 1:		950 TOWER LANE
		STREET 2:		SUITE 1150
		CITY:			FOSTER CITY
		STATE:			CA
		ZIP:			94404
		BUSINESS PHONE:		6505251300

	MAIL ADDRESS:	
		STREET 1:		950 TOWER LANE
		STREET 2:		SUITE 1150
		CITY:			FOSTER CITY
		STATE:			CA
		ZIP:			94404
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-01-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000105006</issuerCik>
        <issuerName>WJ COMMUNICATIONS INC</issuerName>
        <issuerTradingSymbol>WJCN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001099188</rptOwnerCik>
            <rptOwnerName>PAINE W DEXTER III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>950 TOWER LANE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1150</rptOwnerStreet2>
            <rptOwnerCity>FOSTER CITY</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94404</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-01-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
                <footnoteId id="F4"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>11529230</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25492044</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See FN</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On January 28, 2004, Fox Paine Capital Fund, L.P., FPC Investors, L.P., WJ Coinvesment Fund I, LLC, WJ Coinvestment Fund III, LLC and WJ Coinvestment Fund IV, LLC sold registered shares pursuant to the Form S-3 Registration Statement filed by WJ Communications, Inc. with the Securities and Exchange Commission (333-110111) which was declared effective on December 29, 2003.  Fox Paine Capital, LLC is (i) the General Partner of Fox Paine Capital Fund, LP and FPC Investors, LP (collectively, the &quot;LPs&quot;) and (ii) the manager of WJ Coinvestment Fund I, LLC, WJ Coinvestment Fund III, LLC and WJ Coinvestment Fund IV, LLC.</footnote>
        <footnote id="F2">The Reporting Person is a Member of Fox Paine Capital, LLC (&quot;Capital LLC&quot;) and a director of Fox Paine &amp; Co., LLC (&quot;Company LLC&quot;).  Capital LLC is (i) the General Partner of Fox Paine Capital Fund, LP and FPC Investors, LP (collectively, the &quot;LPs&quot;), each of which is a direct owner of, respectively, 24,155,413 and 358,422 shares of common stock of the Issuer, and (ii) the manager of WJ Coinvestment Fund I, LLC, WJ Coinvestment Fund II, LLC, WJ Coinvestment Fund III, LC and WJ Coinvestment Fund IV, LLC, which directly own 601,478, 251,155 and 125,576 shares, respectively.  Company LLC is the manager of the LP's.  On 4/23/2001, WJ Coinvestment Fund II, LLC transferred 1,276,594 shares to certain individuals in which the Reporting Person has no direct or pecuniary interest.  As a result, Capital LLC and company LLC may in the aggregate be deemed to own beneficially and indirectly 25,492,044 shares.</footnote>
        <footnote id="F3">The reporting persons disclaims beneficial ownership of the Shares except to the extent of its pecuniary interest therein.</footnote>
        <footnote id="F4">There has been no transaction in the holdings for this Reporting Person.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Amy Recchio, as Attorney-in-Fact</signatureName>
        <signatureDate>2004-01-30</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
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