1 EXHIBIT 21 SUBSIDIARIES OF THE ALLEN TELECOM INC. -------------------------------------- The following is a list of the subsidiaries of Allen Telecom Inc. (Delaware, 02-03-69), and indented, subsidiaries of such subsidiaries, including in each case the state or other jurisdiction in which each subsidiary was incorporated or organized, and indicating in each case the percentage of voting securities owned by the immediate parent. STATE/COUNTRY OF NAME OF CORPORATION INCORPORATION DATE % - ------------------- ------------- ---- - The Allen Group Canada Limited Ontario, Canada 04-19-72 100 The Allen Group International, Inc. Delaware 07-19-73 100 The Allen Group GmbH Germany 09-29-70 100 The Allen Group Internat'l Sales Corp. Barbados 09-15-94 100 Allen Telecom Canada, Inc. (2) Ontario 04-14-93 80 Antenna Specialists Co., Inc. Delaware 10-07-88 100 Antespec, S.A. de C.V. Mexico 11-14-88 100 Decibel Mobilcom GmbH (1) Germany 07-28-90 100 Decibel Mobilcom Limited (1) England 01-31-91 100 RF Micro Devices, Inc. North Carolina 02-27-92 12.4 Orion Far East Management Inc. (1) Delaware 07-16-81 100 Orion Industries, Inc., Limited (1) Hong Kong 06-01-71 100 Orion Imports & Exports Limited (1) Hong Kong 09-07-73 100 Orion Industries, Inc. Japan (1) Japan 09-73 100 Orion Industries Taiwan Limited (1) Taiwan 10-73 100 Allen Telecom Group (Italia) S.r.l. Italy 11-14-94 100 FOR.E.M. S.p.A. (3) Italy 10-10-72 80 FOREM France S.a.r.l. (4) France 1993 96 FOREM (UK) Limited U.K. 1988 100 MIKOM G.m.b.H. (5) Germany 05-07-85 62 Mitras Ltd. (6) Hungary 1992 60 Mikom Vertriebs and Service GmbH (7) Austria 10-18-96 60 Teamwork ATG Party Ltd. Australia 07-23-96 19.8 Tekmar Sistemi S.r.l. (8) Italy 1996 64.3 Allen Telecomunicadoes do Brasil Ltda (9) Brazil 11-95 100 MARTA Technologies, Inc. Delaware 10-14-92 100 2 STATE/COUNTRY OF NAME OF CORPORATION INCORPORATION DATE % - ------------------- ------------- ---- - Allen Telecom Group Limited (1) U.K. 05-08-72 100 Signal Science, Incorporated California 09-25-74 100 Telecom Wireless Solutions, Inc. Delaware 10-31-94 19 <FN> (1) These subsidiaries are not significant in the aggregate and are no longer active. (2) 80% of the outstanding capital stock of this subsidiary is owned by Allen Telecom Inc. and the remaining 20% is owned by senior management of Allen Telecom Canada, Inc. (3) 80% of the outstanding capital stock of this subsidiary is owned by Allen Telecom Group (Italia) S.r.l., which also owns options to acquire the remaining 20%. (4) 96% of the outstanding capital stock of this subsidiary is owned by FOR.E.M. S.p.A. and the remaining 4% is owned by senior management of FOREM France S.a.r.l. (5) 62% of the outstanding capital stock of this subsidiary is owned by FOR.E.M. S.p.A. and the remaining 38% is owned by the managing director of MIKOM G.m.b.H. (6) 60% of the outstanding capital stock of this subsidiary is owned by MIKOM G.m.b.H. and the remaining 40% is owned by senior management of Mitras Ltd. (7) 60% of the outstanding capital stock is owned by MIKOM G.m.b.H. and the remaining 40% is owned by the partners of MIKOM G.m.b.H. in the venture. (8) 64.3% of the outstanding capital stock of this subsidiary is owned by Allen Telecom Group, Inc. which also owns options to acquire the remaining 35.7%. (9) 99% of the outstanding capital stock of this subsidiary is owned by Allen Telecom Inc. and the remaining 1% is owned by The Allen Group International, Inc.