EXHIBIT 16.1 TO FORM 8-K February 23, 2004 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 Gentlemen: We have read Item 4 of Form 8-K dated (dated February 23, 2004), of Celeritek Inc. and are in agreement with the statements contained in the first two paragraphs and the first sentence of the sixth paragraph on page 2 therein. We have no basis to agree or disagree with other statements of the registrant contained therein. /s/ Ernst & Young LLP