Exhibit 3.1

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

OF

API TECHNOLOGIES CORP.

FIRST: The name of the Corporation is:

API TECHNOLOGIES CORP.

SECOND: The address of the Corporation’s registered office in the State of Delaware is 2711 Centerville Road, Suite 400, in the City of Wilmington, County of New Castle, 19808. The name of its registered agent at such address is Corporation Service Company.

THIRD: The purpose of the Corporation is to engage in any lawful act or activity for which a corporation may be organized under the General Corporation Law of the State of Delaware.

FOURTH: The total number of shares of capital stock which the Corporation shall have authority to issue is three thousand (3,000) shares of Common Stock, par value $.01 per share.

FIFTH: Unless required by law or determined by the chairman of the meeting to be advisable, the vote by stockholders on any matter, including the election of directors, need not be by written ballot.

SIXTH: The Corporation reserves the right to increase or decrease its authorized capital stock, or any class or series thereof, and to reclassify the same, and to amend, alter, change or repeal any provision contained in the Certificate of Incorporation under which the Corporation is organized or in any amendment thereto, in the manner now or hereafter prescribed by law, and all rights conferred upon stockholders in said Certificate of Incorporation or any amendment thereto are granted subject to the aforementioned reservation.

SEVENTH: The Board of Directors shall have the power at any time, and from time to time, to adopt, amend and repeal any and all By-Laws of the Corporation.

EIGHTH: 1. Indemnification

The Corporation shall, and does hereby, indemnify to the fullest extent permitted or authorized by the General Corporation Law of the State of Delaware or judicial or administrative decisions, as the same exists or may hereafter be amended or interpreted differently in the future (but, in the case of any such amendment or interpretation, only to the extent that such amendment or interpretation permits the Corporation to provide broader indemnification rights than permitted prior thereto), each person (including the current and future heirs, beneficiaries, personal representatives and estate of such person) who was or is a party, or is threatened to be made a party, or was or is a witness, to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (a “Proceeding”) and whether the basis of such Proceeding is an allegation of an action in an official capacity of such person related to the Corporation or any other capacity while such person is serving as an officer, director, employee or agent of the Corporation, against any liability (which for purposes of this Article shall include any judgment, settlement, penalty or fine) or cost, charge or expense (including attorneys’ fees) asserted against him or incurred by him by reason of the fact that such indemnified person (1) is or was a director, officer or employee of the Corporation or (2) is or was an agent of the Corporation as to whom the Corporation, by action of its Board of Directors, has agreed to grant such indemnity or (3) is or was serving, at the request of the Corporation, as a director, officer or employee of another corporation,

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partnership, joint venture, trust or other enterprise (including serving as a fiduciary of any employee benefit plan) or (4) is or was serving as an agent of such other corporation, partnership, joint venture, trust or other enterprise described in clause (3) hereof as to whom the Corporation, by action of its Board of Directors, has agreed to grant such indemnity. Each director, officer, employee or agent of the Corporation to whom indemnification rights under this Section 1 of this Article have been granted shall be referred to as an “Indemnified Person.”

Notwithstanding the foregoing, except as specified in Section 3 of this Article, the Corporation shall not be required to indemnify an Indemnified Person in connection with a Proceeding (or any part thereof) initiated by such Indemnified Person unless such authorization for such Proceeding (or any part thereof) was not denied by the Board of Directors of the Corporation prior to sixty (60) days after receipt of notice thereof from such Indemnified Person stating his intent to initiate such Proceeding and only upon such terms and conditions as the Board of Directors may deem appropriate.

2. Advance of Costs, Charges and Expenses

Costs, charges and expenses (including attorneys’ fees) incurred by an officer, director, employee or agent who is an Indemnified Person in defending a Proceeding shall be paid by the Corporation to the fullest extent permitted or authorized by the General Corporation Law of the State of Delaware or judicial or administrative decisions, as the same exists or may hereafter be amended or interpreted differently in the future (but, in the case of any such future amendment or interpretation, only to the extent that such amendment or interpretation permits the Corporation to provide broader rights to advance costs, charges and expenses than permitted prior thereto), in advance of the final disposition of such Proceeding, upon receipt of an undertaking by or on behalf of the Indemnified Person to repay all amounts so advanced in the event that it shall ultimately be determined by final judicial decision that such person is not entitled to be indemnified by the Corporation as authorized in this Article and upon such other

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terms and conditions, in the case of an agent as to whom the Corporation has agreed to grant such indemnity, as the Board of Directors may deem appropriate. The Corporation may, upon approval of the Indemnified Person, authorize the Corporation’s counsel to represent such person in any Proceeding, whether or not the Corporation is a party to such Proceeding. Such authorization may be made by the Board of Directors by majority vote, including directors who are parties to such Proceeding.

3. Procedure for Indemnification

Any indemnification or advance under this Article shall be made promptly and in any event within thirty (30) days upon the written request of the Indemnified Person (except in the case of a claim for an advancement of costs, charges or expenses, in which case the applicable period shall be twenty (20) days). The right to indemnification or advances as granted by this Article shall be enforceable by the Indemnified Person in any court of competent jurisdiction if the Corporation denies such request under this Article, in whole or in part, or if no disposition thereof is made within thirty (30) days or twenty (20) days, as may be applicable. Such Indemnified Person’s costs and expenses incurred in connection with successfully establishing his right to indemnification or advancement of costs, charges or expenses, in whole or in part, in any such action shall also be indemnified by the Corporation. It shall be a defense to any such action that the claimant has not met the standard of conduct, if any, required by the General Corporation Law of the State of Delaware or judicial or administrative decisions, as the same exists or may hereafter be amended or interpreted differently in the future (but, in the case of any such future amendment or interpretation, only to the extent that such amendment or interpretation does not impose a more stringent standard of conduct than permitted prior thereto), but the burden of proving such defense shall be on the Corporation. Neither the failure of the

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Corporation (including its Board of Directors or any committee thereof, its independent legal counsel, and its stockholders) to have made a determination prior to the commencement of such action that indemnification of the claimant or advancement for the claimant is proper in the circumstances because he has met the applicable standard of conduct, if any, nor the fact that there has been an actual determination by the Corporation (including its Board of Directors or any committee thereof, its independent legal counsel, or its stockholders) that the claimant has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that the claimant has not met the applicable standard of conduct.

4. Non-Exclusivity; Survival of Indemnification

The indemnification and advancement provided by this Article shall not be deemed exclusive of any other rights to which those Indemnified Persons may be entitled under any agreement, vote of stockholders or disinterested directors or recommendation of counsel or otherwise, both as to actions in such person’s official capacity and as to actions in any other capacity while holding such office or position, and shall continue as to an Indemnified Person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the heirs, beneficiaries, personal representatives and the estate of such person. All rights to indemnification and advancement under this Article shall be deemed to be a contract between the Corporation and each Indemnified Person who serves or served in such capacity at any time while this Article is in effect. Any repeal or modification of this Article or any repeal or modification of relevant provisions of the General Corporation Law of the State of Delaware or any other applicable laws shall not in any way diminish any rights to indemnification of such Indemnified Person, or the obligations of the Corporation arising hereunder, for claims relating to matters occurring prior to such repeal or modification.

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5. Insurance

The Corporation may purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise (including serving as a fiduciary of an employee benefit plan) against any liability asserted against him and incurred by him in any such capacity or arising out of his status as such, whether or not the Corporation would have the power to indemnify him against such liability under the provisions of this Article or the applicable provisions of the General Corporation Law of the State of Delaware.

6. Savings Clause

If this Article or any portion hereof shall be invalidated on any ground by any court of competent jurisdiction, then the Corporation shall nevertheless indemnify and advance costs to each Indemnified Person as to costs, charges and expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement with respect to any Proceeding, including an action by or in the right of the Corporation, to the full extent permitted by any applicable portion of this Article that shall not have been invalidated and as permitted by the General Corporation Law of the State of Delaware.

NINTH: No director of the Corporation shall be personally liable to the Corporation or its stockholders for any monetary damages for breaches of fiduciary duty as a director, provided that this provision shall not eliminate or limit the liability of a director (i) for any breach of the director’s duty of loyalty to the Corporation or its stockholders; (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law; (iii) under Section 174 of the General Corporation Law of the State of Delaware; or (iv) for

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any transaction from which the director derived an improper personal benefit. No repeal or amendment of this Article shall adversely affect any rights of any person pursuant to this Article which existed at the time of such repeal or amendment with respect to acts or omissions occurring prior to such repeal or amendment.

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