This part is a kind of semiconductor called RF2401.

Function of this product has Low Noise Amplifier / Mixer.

Manufacturers : RF Micro Devices

Image and pinout :

Some of the text within the PDF file :

RF2401

 
          • UHF Digital and Analog Receivers • Digital Communication Systems • Commercial and Consumer Systems • Portable Battery Powered Equipment • Spread Spectrum Communication Systems • General Purpose Frequency Conversion
    The RF2401 is a monolithic integrated UHF receiver front-end. The IC contains all of the required components to implement the front-end functions of the receiver except for the passive filtering and LO generation. It contains a high dynamic range LNA (low-noise amplifier), an attenuator to reduce signal level in the presence of large received signals, a second RF amplifier, a double balanced mixer, an LO buffer amplifier, and an IF output amplifier which will drive [ ... ]

RF2401 PDF Datasheet Download