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JOINT FILING AGREEMENT
This Joint Filing Agreement (this "Agreement") is entered into as of
July 2, 2001 by and between NexGen Technologies, L.L.C., a limited liability
company organized under the laws of the State of Maryland ("NexGen"), and ▇▇▇▇▇
▇. ▇▇▇▇, an individual United States citizen ("▇▇▇▇").
NexGen and ▇▇▇▇ hereby agree to jointly prepare and timely file (or
otherwise deliver, as appropriate) all statements on Schedule 13D or amendments
thereto ("13D Filings") required to be filed by them pursuant to the Securities
Exchange Act of 1934, as amended, with respect to their respective ownership of
common shares, par value $.01 per share, of Aether Systems, Inc., and each of
them mutually covenants to the other that they will fully cooperate with each
other in the preparation and timely filing of all such 13D Filings.
IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first above set forth.
NEXGEN TECHNOLOGIES, L.L.C.
By: /s/ ▇▇▇▇▇ ▇. ▇▇▇▇
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▇▇▇▇▇ ▇. ▇▇▇▇
Its: Managing Member
/s/ ▇▇▇▇▇ ▇. ▇▇▇▇
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▇▇▇▇▇ ▇. ▇▇▇▇