content: <PAGE>
  
                        SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C.  20549
  
                                     FORM 8-K
  
                                  CURRENT REPORT
  
                      Pursuant to Section 13 or 15(d) of the
                          Securities Exchange Act of 1934
  
         Date of Report (Date of earliest event reported):  March 20, 2001
  
                          ADAPTIVE BROADBAND CORPORATION
              (Exact name of registrant as specified in its charter)
  
                                     Delaware
                             (State of incorporation)
  
        000-7428                                            94-1668412
  (Commission File No.)                          (IRS Employer Identification No.)
  
                                1143 BORREGAS AVENUE
                            SUNNYVALE, CALIFORNIA 94089
               (Address of principal executive offices and zip code)
  
         Registrant's telephone number, including area code: (408) 732-4000
  
  
                    -------------------------------------------
  <PAGE>
  
  Item 5.  Other Events.
  
        Adaptive Broadband Corporation (the "Company") announced today that
  several class action lawsuits have been filed against it and certain of its
  former officers and directors alleging violations of federal securities laws in
  connection with the Company's financial statements for the quarter ended June
  30, 2000.  The Company's press release dated March 20, 2001, entitled "Lawsuits
  Filed Against Adaptive Broadband(TM) and Certain Former Executive Officers," is
  attached hereto as Exhibit 99.1.
  
  Item 7.  Exhibits.
  
     99.1     Press Release, dated as of March 20, 2001, entitled "Lawsuits Filed
              Against Adaptive Broadband(TM) and Certain Former Executive
              Officers."
  <PAGE>
  
                                     SIGNATURE
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  registrant has duly caused this report to be signed on its behalf by the
  undersigned, thereunto duly authorized.
  
                                      Adaptive Broadband Corporation
  
  Dated:  March 22, 2001              By:    /s/  Kenneth J. Wees
                                          ----------------------------------
                                             Kenneth J. Wees
                                             Vice President, General Counsel
                                             and Secretary
  <PAGE>
  
                                 INDEX TO EXHIBITS
  
     99.1     Press Release, dated as of March 20, 2001, entitled "Lawsuits Filed
              Against Adaptive Broadband(TM) and Certain Former Executive
              Officers."
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metadata_filer: {"company-data": {"conformed-name": "ADAPTIVE BROADBAND CORP", "cik": "0000016357", "assigned-sic": "3663", "irs-number": "941668412", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-07428", "film-number": "1576657"}, "business-address": {"street1": "1143 BORREGAS AVE", "city": "SUNNYVALE", "state": "CA", "zip": "94089", "phone": "4087324000"}, "mail-address": {"street1": "ADAPTIVE BROADBAND CORPORATION", "street2": "1143 BORREGAS AVE", "city": "SUNNYVALE", "state": "CA", "zip": "94089"}, "former-company": {"former-conformed-name": "CALIFORNIA MICROWAVE INC", "date-changed": "19920703"}}
text: SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C.  20549
  
                                     FORM 8-K
  
                                  CURRENT REPORT
  
                      Pursuant to Section 13 or 15(d) of the
                          Securities Exchange Act of 1934
  
         Date of Report (Date of earliest event reported):  March 20, 2001
  
                          ADAPTIVE BROADBAND CORPORATION
              (Exact name of registrant as specified in its charter)
  
                                     Delaware
                             (State of incorporation)
  
        000-7428                                            94-1668412
  (Commission File No.)                          (IRS Employer Identification No.)
  
                                1143 BORREGAS AVENUE
                            SUNNYVALE, CALIFORNIA 94089
               (Address of principal executive offices and zip code)
  
         Registrant's telephone number, including area code: (408) 732-4000
  
                    -------------------------------------------
  Item 5.  Other Events.
  
        Adaptive Broadband Corporation (the "Company") announced today that
  several class action lawsuits have been filed against it and certain of its
  former officers and directors alleging violations of federal securities laws in
  connection with the Company's financial statements for the quarter ended June
  30, 2000.  The Company's press release dated March 20, 2001, entitled "Lawsuits
  Filed Against Adaptive Broadband(TM) and Certain Former Executive Officers," is
  attached hereto as Exhibit 99.1.
  
  Item 7.  Exhibits.
  
     99.1     Press Release, dated as of March 20, 2001, entitled "Lawsuits Filed
              Against Adaptive Broadband(TM) and Certain Former Executive
              Officers."
  SIGNATURE
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  registrant has duly caused this report to be signed on its behalf by the
  undersigned, thereunto duly authorized.
  
                                      Adaptive Broadband Corporation
  
  Dated:  March 22, 2001              By:    /s/  Kenneth J. Wees
                                          ----------------------------------
                                             Kenneth J. Wees
                                             Vice President, General Counsel
                                             and Secretary
  INDEX TO EXHIBITS
  
     99.1     Press Release, dated as of March 20, 2001, entitled "Lawsuits Filed
              Against Adaptive Broadband(TM) and Certain Former Executive
              Officers."