Affiniti has been appointed to provide and manage the new IP-based infrastructure.
The 10-year contract will see Affiniti initially provide a comprehensive managed data network at the Trust's Dewsbury hospital, as well as to the two new hospitals currently being built at Pinderfields and Pontefract.
The new wireless network will offer the potential for medical staff to access test results at patients' bedsides - bringing up results, X-rays and medical records in real-time, so doctors and patients can look at them together quickly and easily.
With information at their fingertips, medical staff will save time tracking down charts and details, enabling them to focus more on caring for their patients.
The additional capacity provided by the network will also help the trust ensure seamless use of large sensitive files, such as X-rays and picture archives.
The advanced wireless network will also enable the Trust's hospitals to use RFID technology to track the location of critical and expensive medical equipment across all its buildings.
The network will benefit the new hospitals when they open in 2010, but it is expected that the Dewsbury hospital will profit from the technology as early as next year.
Simon Nahk, director of information management and technology and performance at Mid Yorkshire Hospitals NHS Trust, said, "With the confidence of a highly flexible, robust and shared data network, the trust can plan for a paper-free future.
"This will result in the need for much less storage space which costs money, staff time will be saved not having to chase information or queue for PCs, and we will have increased security for medical equipment because we can electronically tag and track it."
The potential for integrating the telephone system with IT systems to plan and schedule staff is another possibility the new network will open up, said Nahk.
Affiniti's network solution provides both a fibre backbone and the wireless capability.