Research In Motion is trying to appear as if its keeping a cool head, despite a falling stock and financial analysts sceptical about its strategy.

On Thursday an executive quietly announced on a blog that it has bought New Hampshire based Paratek Microwave, which makes integrated circuits that optimize multiband antennas.

RIM didn’t release an official news release on the deal. The only comment came on Paratek’s Web site.

“We are pleased to announce that RIM has acquired Paratek Microwave Inc.,”  CEO Ralph Pini said in the release.

“As a part of RIM, a technology leader and pioneer in the smart phone category, Paratek will continue to innovate and to bring leading edge adaptive tuning solutions to the industry. We are very excited about this transaction and the opportunity to serve RIM and realize our vision.

“As always, we will continue to pursue the development of state-of-the-art adaptive tuning technologies. We look forward to working with our new colleagues and integrating our solutions into RIM’s BlackBerry product offerings.”

According to the company’s Web site, Paratek produces highly miniaturized 'tuning' circuits that can be inserted into mobile phones to improve performance.

The price of the deal wasn’t announced.

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