Exhibit 21

SUBSIDIARIES OF THE COMPANY

Name	State or Province of Incorporation
Spectrum Control, Inc.	Pennsylvania
Spectrum Control, Inc.	Delaware
Spectrum Engineering International, Inc.	Delaware
Spectrum Control Technology, Inc.	Delaware
Spectrum FSY Microwave, Inc.	Maryland
Spectrum SEI Microwave, Inc.	Delaware
Spectrum Microwave, Inc.	Delaware
Spectrum Control GmbH	Germany
Spectrum Control de Mexico	Mexico
Spectrum Control (Hong Kong) Limited	Hong Kong
Spectrum Control Electronics (Dongguan) Co. LTD.	Peoples Republic of China
CMT Filters, Inc.	Delaware
SenDEC Corp.	New York
API Cryptek Inc. d/b/a ION Networks	Delaware
API Electronics Group Corp.	Ontario
API Nanotronics Sub, Inc.	Ontario
API Passive Components Inc.	Delaware
API Systems, Inc.	Delaware
API Defense, Inc.	Delaware
API Defense USA, Inc.	Delaware
Emcon USA, Inc.	Delaware
Cryptek Holdco UK Limited	United Kingdom
Emcon2007 Holdco Inc.	Canada
Emcon Emanation Control Ltd.	Canada
Filtran Limited	Ontario
National Hybrid, Inc.	New York
Secure Systems & Technologies, Ltd.	United Kingdom
API Technologies (UK) Limited	United Kingdom
RF2M Ltd. (f/k/a C-MAC Aerospace Ltd.)	United Kingdom
RF2M Microelectronics Limited (f/k/a C-MAC Microcircuits Ltd.)	United Kingdom
RF2M Microwave Ltd. (f/k/a Cobham MAL Ltd.)	United Kingdom