PARIS — Less than two weeks after saying it would buy McAfee, Intel announced Monday that it would acquire the wireless business of the German chip maker Infineon for about $1.4 billion in cash.

Paul Otellini, the head of Intel, said that more and more devices were connecting to the Internet and that wireless connectivity was a sector where the company saw “growth potential.”

The Infineon unit makes chips used in laptops, netbooks and smartphones, including the Apple iPhone, and will strengthen Intel’s lineup of 3G, 4G, Wimax and Wi-Fi cards.

Intel expects the deal to close in the first quarter of next year, pending regulatory approvals.

Bernd Laux, a research analyst with Cheuvreux in Frankfurt, said the price tag was “fair,” and called the deal “smart and well-timed,” but predicted “the equity market will give Infineon only very brief credit for the disposal.”