UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    Form 6-K

                        REPORT OF FOREIGN PRIVATE ISSUER

                        PURSUANT TO RULE 13a-16 OR 15d-16
                     OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2005

Commission File Number:  0-30628


                                  ALVARION LTD.
--------------------------------------------------------------------------------
                 (Translation of registrant's name into English)

                   21A Habarzel Street, Tel Aviv 69710, Israel
--------------------------------------------------------------------------------
                     (Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports
under cover of Form 20-F or Form 40-F.
Form 20-F |X|   Form 40-F |_|

Indicate by check mark if the registrant is submitting the Form 6-K in paper as
permitted by Regulation S-T Rule 101(b)(1): ____

Indicate by check mark if the registrant is submitting the Form 6-K in paper as
permitted by Regulation S-T Rule 101(b)(7): ____

Indicate by check mark whether by furnishing the information contained in this
Form, the registrant is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.
Yes |_| No |X|

If "Yes" is marked, indicate below the file number assigned to the registrant in
connection with Rule 12g3-2(b): 82-___________




The following are included in this report on Form 6-K:

                                                           Sequential
     Exhibit               Description                     Page Number
     -------               -----------                     -----------

       1.          Press release, dated April 13, 2005            3





                                       2



                                   SIGNATURES

            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.


                                    ALVARION LTD.



Date: April 17, 2005                By: /s/ Dafna Gruber 
                                       ---------------------------------
                                    Name:  Dafna Gruber
                                    Title: Chief Financial Officer




                                       3



                                            EXHIBIT 1

Contacts
Dafna Gruber, CFO                        Carmen Deville
+972 3 645 6252                          +760-517-3188
+760-517-3187
dafna.gruber@alvarion.com            carmen.deville@alvarion.com
-------------------------            ---------------------------


                                                           FOR IMMEDIATE RELEASE


O2 IRELAND AND SIEMENS TRIAL ALVARION'S WiMAX-READY
PLATFORM IN GLEANN CHOLM CILLE, DONEGAL

Cellular Operator Uses BreezeMAX(TM) to Overcome Difficult Irish Terrain


Tel-Aviv, Israel, April 13, 2005- Alvarion Ltd., (NASDAQ: ALVR), the world's
leading provider of wireless broadband solutions and supplier of specialized
mobile systems, today announced that O2 plc, a leading mobile operator, and
Siemens successfully completed a test of its BreezeMAX(TM) 3500, a WiMAX-ready
solution. The system was used to provide broadband services to households and
small businesses in Gleann Cholm Cille in Donegal, Ireland. The trial was
conducted over the span of a four month period and concluded in early 2005.


"After trialing Alvarion's WiMAX-ready system, we found its technology
interesting as a natural extension to the wireless LAN hotspots we have deployed
across Ireland to date," said Orlagh Nevin, Head of Business Services for O2
Ireland. "O2's approach is to ensure that we keep up to date with new and
emerging technologies and by conducting trials such as the WiMAX trial in Gleann
Cholm Cille, we get real information and feedback. Having conducted trials on a
number of technologies, the results from the trial in Gleann Cholm Cille showed
that WiMAX was a viable solution for delivering broadband services to the rural
areas of Ireland."


With this BreezeMAX trial, Gleann Cholm Cille in Donegal joined selected
European locations as pioneers in experiencing first-hand the benefits of
WiMAX's quality of service (QoS), wide coverage and next generation
non-line-of-sight (NLOS) performance. The Gleann Cholm Cille valley was selected
as the location due to its challenging terrain and substantial distance from the
nearest high-capacity network. BreezeMAX systems are operational in other
Western European countries, including France and Spain.


"BreezeMAX's non-line-of-sight capabilities facilitate almost universal
accessibility to customers in a large base station area, making it an efficient
and cost effective technology to roll out," commented Brendan Martin, Sales
Manager of Siemens. "It is exciting to take a major role in the trials and
eventual deployments of WiMAX technology across Europe."

BreezeMAX is a third-generation OFDM platform with advanced NLOS functionality
and is designed for operators to offer broadband IP-based voice and data
services. In addition, it enables carriers to evolve their networks to industry
standard solutions with


                                       4



all the benefits of vendor interoperability. Its carrier-class design supports
high QoS and broadband speeds to enable carriers to offer both data and
toll-quality voice to thousands of subscribers in a single cell.

"As expected, responses have been positive regarding the technology, and
especially optimistic about the business case and overall service provisioning,"
said Zvi Slonimsky, CEO of Alvarion. "Deployment of BreezeMAX systems for fixed
broadband access today speaks well to Alvarion's clear roadmap and vision. There
is no doubt that WiMAX is the future for providing broadband in many areas in
Ireland and throughout the world."

About O2 plc
O2 plc has 100% ownership of mobile network operators in three countries - the
UK, Germany and Ireland. All of these businesses are branded as 'O2'. The
company is a founding member of Starmap Mobile Alliance, has operations on the
Isle of Man (Manx Telecom) and owns O2 Airwave - an advanced, digital emergency
communications service. In addition, O2 has established the Tesco Mobile and
Tchibo Mobilfunk joint venture businesses in the UK and Germany respectively.
For more information, visit http://www.o2.com.

About Siemens
Siemens Communications is one of the largest players in the global
telecommunications industry. Siemens is the only provider in the market that
offers its customers a full-range portfolio, from devices for end users to
complex network infrastructures for enterprises and carriers as well as related
services. Siemens Communications is the world's innovation leader in convergent
technologies, products and services for wireless, fixed and enterprise networks.
For more information, visit http://www.siemens.com/communications.


About Alvarion
With more than 2 million units deployed in 130 countries, Alvarion is the
worldwide leader in wireless broadband providing systems to carriers, ISPs and
private network operators. Leading the WiMAX revolution, Alvarion has the most
extensive deployments and proven product portfolio in the industry covering the
full range of frequency bands. Alvarion's products enable the delivery of
business and residential broadband access, corporate VPNs, toll quality
telephony, mobile base station feeding, Hotspot coverage extension, community
interconnection, and public safety communications. Alvarion works with several
top OEM providers and over 200 local partners to support its diverse global
customer base in solving their last-mile challenges.
 
As a wireless broadband pioneer, Alvarion has been driving and delivering
innovations for over 10 years from core technology developments to creating and
promoting industry standards. Leveraging its key roles in the IEEE and HiperMAN
standards committees and experience deploying OFDM-based systems, the company's
prominent work in the WiMAX ForumTM is focused on increasing widespread adoption
of standards-based products in the wireless broadband market.

For more information, visit Alvarion's World Wide Web site at www.alvarion.com

This press release contains forward -looking statements within the meaning of
the "safe harbor" provisions of the Private Securities Litigation Reform Act of
1995. These statements are based on the current expectations or beliefs of
Alvarion's

                                       5



management and are subject to a number of factors and uncertainties that could
cause actual results to differ materially from those described in the forward
-looking statements. The following factors, among others, could cause actual
results to differ materially from those described in the forward-looking
statements: inability to further identify, develop and achieve success for new
products, services and technologies; increased competition and its effect on
pricing, spending, third-party relationships and revenues; as well as the in
ability to establish and maintain relationships with commerce, advertising,
marketing, and technology providers and other risks detailed from time to time
in filings with the Securities and Exchange Commission.

Information set forth in this press release pertaining to third parties has not
been independently verified by Alvarion and is based solely on publicly
available information or on information provided to Alvarion by such third
parties for inclusion in this press release. The web sites appearing in this
press release are not and will not be included or incorporated by reference in
any filing made by Alvarion with the Securities and Exchange Commission, which
this press release will be a part of.

You may request Alvarion's future press releases or a complete Investor Kit by
contacting Carmen Deville, Investor Relations: carmen.deville@alvarion.com or
+1-760-517-3188.




                                       6