1 EXHIBIT 11 COMPUTATION OF PER SHARE EARNINGS ALLEN TELECOM INC. (Amounts in Thousands) Net income and common shares used in the calculations of earnings per common share were computed as follows: NINE MONTHS THREE MONTHS ENDED ENDED SEPTEMBER 30, SEPTEMBER 30, ------------------------- ------------------------- 1998 1997 1998 1997 ---- ---- ---- ---- Income: - ------- Net income (loss) applicable to Common stock - Basic and Diluted $ (2,112) $ 7,930 $ (6,908) $ 21,690 ======== ======== ======== ======== Common Shares: - -------------- Weighted average common shares outstanding- Basic 27,240 27,070 27,190 26,850 Assumed exercise of stock options 100 510 180 430 -------- -------- -------- -------- Common shares - Diluted 27,340 27,580 27,370 27,280 ======== ======== ======== ========