ALO ALTO, Calif., Aug. 17 — Airgo Networks, a heavily financed Silicon Valley start-up, plans on Monday to introduce an alternative to the popular Wi-Fi wireless data standard for connecting to the Internet, capable of doubling Wi-Fi's already high speed and extending its range.

Airgo's technology is just one example, industry executives said, of the continued emergence of new companies, undercutting recent fears that wireless technology innovation is slowing and is in danger of being dominated by a few large established concerns.

"Just as the revolution starts to happen, some people are saying that it's over," said Craig Mathias, president of the Farpoint Group, a industry consulting firm in Ashland, Mass. "Clearly, we are in the early days of wireless data."

Airgo's technology, known as multiple-in, multiple-out, or MIMO, relies on taking advantage of huge amounts of computing power to send numbers of signals from closely spaced antennas. By doing so, Airgo is able to squeeze in and out more data than conventional wireless data arrangements.

But Airgo faces a big challenge in winning broad support for an approach that is not compatible with the existing Wi-Fi standards.

The company said it hopes to create markets by seeking out consumer wireless equipment companies serving local area networks, hoping that in a hotly contested marketplace, a higher-speed, greater-range option will soon prove advantageous, even if it is not compatible with existing software.

On Monday, Airgo will announce a chip set that extends the speed at which data can be delivered to a computer by wireless radio signal, to as much as 108 megabits a second. Current Wi-Fi standards are capable of data speeds ranging from 11 to 54 megabits a second. The company says the signal can be sent farther as well — from two to six times as far as current Wi-Fi technology, which typically reaches only about 100 to 150 feet from a transmitter connected to the Internet.

"We've created a new currency that is better range and better performance," Airgo's chief executive, Greg Raleigh, said.

The industry is working to define a new generation of Wi-Fi that could take data rates to 200 megabits or even higher, and Mr. Raleigh said Airgo would propose its technology for the standard.

In addition to computer communications applications, Mr. Raleigh said he expects new consumer uses for very high speed wireless, like data connections for HDTV television sets and other home appliances.

Michael Kleeman, chief technology officer of Cometa Networks of San Francisco, which is installing Wi-Fi access points nationally, said: "People are beginning to realize that it is important to focus on the radio frequency side of the equation. Now, people are paying attention to antennas."

Airgo's MIMO technology was pioneered at Stanford University, Bell Laboratories and other research centers. It is an example of the shift to what are known as smart antennas, an approach that is being widely adopted in the wireless networking world.

Other companies are also striving to develop antenna technologies to improve wireless data service. These include Vivato, a wireless technology company that is using antennas to direct beams, and the leading chip maker Intel, which has acquired the intellectual property of another Silicon Valley MIMO company, IoSpan Wireless.

Airgo, whose founders started and then sold Clarity Wireless to Cisco Systems in 1998, has so far raised a total of $52 million in venture capital from OVP Venture Partners, Sevin Rosen Funds, Nokia Venture Partners and Accel Partners.