EXHIBIT 23.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-42233) of Frequency Electronics, Inc. of our report dated July 6, 2004 relating to the consolidated financial statements and financial statement schedule, which appears in this Form 10-K. PRICEWATERHOUSECOOPERS LLP Melville, New York July 29, 2004 55