As filed with the Securities and Exchange Commission on January 5, 2007

Registration No. 333-137980

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

AMENDMENT NO. 4

TO

FORM S-4

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

HARRIS STRATEX NETWORKS, INC.

(Exact name of registrant as specified in its charter)

c/o Harris Corporation

1025 West NASA Blvd.

Melbourne, Florida 32919

(321) 727-9100

(Address, including zip code, and telephone number,

including area code, of registrant’s principal executive offices)

Scott T. Mikuen

Secretary

Harris Stratex Networks, Inc.

c/o Harris Corporation

1025 West NASA Blvd.

Melbourne, Florida 32919

(321) 727-9100

(Name, address, including zip code, and telephone number,

including area code, of agent for service)

Copies To:

     Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after this registration statement becomes effective and all other conditions to the merger and the contribution transaction described herein have been satisfied or waived.

     If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box.    o

     If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.    o

     If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.    o

     The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, or until this registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

EXPLANATORY NOTE

      Amendment No. 4 to this registration statement on Form S-4 of Harris Stratex Networks, Inc. (File No. 333-137980) is being filed to amend and restate Exhibit 99.12 previously filed with Amendment No. 3 to this registration statement.

PART II. INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 21.     Exhibits and Financial Statement Schedules.

      The following exhibits are filed herewith or incorporated herein by reference unless otherwise indicated:

The following documents have been furnished to the holders of common stock of Stratex Networks, Inc. with the proxy statement/ prospectus forming a part of this registration statement. Accordingly, Exhibit 99.13 through Exhibit 99.25 are hereby incorporated by reference:

SIGNATURES

      Pursuant to the requirements of the Securities Act, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Melbourne, State of Florida, on this 5^th day of January, 2007.

      Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed below by the following persons in the capacities and on the dates indicated.

EXHIBIT INDEX

The following documents have been furnished to the holders of common stock of Stratex Networks, Inc. with the proxy statement/ prospectus forming a part of this registration statement. Accordingly, Exhibit 99.13 through Exhibit 9.25 are hereby incorporated by reference:

THIS PROXY IS SOLICITED ON BEHALF OF

THE BOARD OF DIRECTORS OF STRATEX NETWORKS, INC.

FOR THE SPECIAL MEETING OF STOCKHOLDERS

TO BE HELD ON JANUARY 25, 2007.

      The undersigned revokes all previous proxies, acknowledges receipt of the proxy statement/prospectus of Harris Stratex Networks, Inc. and Stratex Networks, Inc., dated January 5, 2007, and hereby appoints Carl A. Thomsen and Carol A. Goudey or any one of them, proxies, with full power to each of substitution, on behalf and in the name of the undersigned, to represent the undersigned at the special meeting of stockholders of Stratex Networks, Inc. to be held on January 25, 2007 at 10:00 a.m., local time, at the principal executive offices of Stratex Networks, Inc. located at 120 Rose Orchard Way, San Jose, California, and at any adjournment or postponement thereof, and to vote all shares, par value $0.01 per share, of the common stock of Stratex Networks, Inc. which the undersigned would be entitled to vote, if then and there personally present, on the matters set forth on the reverse side.

(Continued, and to be marked, dated and signed, on the other side)

Address Change/ Comments (Mark the corresponding box on the reverse side)

Δ FOLD AND DETACH HERE Δ

THIS PROXY WILL BE VOTED AS DIRECTED OR, IF NO CONTRARY DIRECTION IS INDICATED,

WILL BE VOTED FOR PROPOSALS NUMBER 1 AND NUMBER 2 LISTED BELOW.

This proxy should be marked, dated and signed exactly as your name appears on your stock certificate(s), and returned promptly in the enclosed envelope. Persons signing in a fiduciary capacity should so indicate. If shares are held by joint tenants or as community property, both should sign.

Δ FOLD AND DETACH HERE Δ

WE ENCOURAGE YOU TO TAKE ADVANTAGE OF INTERNET OR TELEPHONE VOTING,

BOTH ARE AVAILABLE 24 HOURS A DAY, 7 DAYS A WEEK.

Internet and telephone voting is available through 11:59 PM Eastern Time

the day prior to the special meeting day.

Your Internet or telephone vote authorizes the named proxies to vote your shares in the same manner

as if you marked, signed and returned your proxy card.

      If you vote your proxy by Internet or by telephone, you do NOT need to mail back your proxy card. To vote by mail, mark, sign and date your proxy card and return it in the enclosed postage-paid envelope.