-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 DKJfrqRxiv2TW/1ruEW6U2P3+mF5pGZ9/ogx21G+I1vs1jSQWJ53DV+TA4y9jur4
 GoEC+ksXFMYw8ntxVmVITw==

<SEC-DOCUMENT>0001179110-05-023923.txt : 20051230
<SEC-HEADER>0001179110-05-023923.hdr.sgml : 20051230
<ACCEPTANCE-DATETIME>20051230115412
ACCESSION NUMBER:		0001179110-05-023923
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20051229
FILED AS OF DATE:		20051230
DATE AS OF CHANGE:		20051230

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DIAMOND BRUCE
		CENTRAL INDEX KEY:			0001251404

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31337
		FILM NUMBER:		051293417

	BUSINESS ADDRESS:	
		STREET 1:		ZILOG INC
		STREET 2:		532 RACE ST
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95126
		BUSINESS PHONE:		4085588500

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:			DE
		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
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-12-29</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001251404</rptOwnerCik>
            <rptOwnerName>DIAMOND BRUCE</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>401 RIVER OAKS PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN JOSE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-12-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4932</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.52</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>494515</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">This amount represents the number of shares remaining pursuant to a restricted stock award after taking into consideration the simultaneous disposition of shares solely to cover tax withholding obligations of the reporting person arising pursuant to a vesting of a portion of the award. The restricted stock vests ratably on a monthly basis over a thirty-six month period following the date of grant of July 29, 2005.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Rainer N. Growitz by Power of Attorney</signatureName>
        <signatureDate>2005-12-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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