The components for the transmit side include the frequency multiplication circuit and the transmit antenna.  After the frequency is doubled, the signal is sent to the transmit antenna, which in this case is a L-Com HG2415EG (right). This antenna has an operating frequency of 2400-2500 MHz with a gain of 15 dBi. Despite the large size, this antenna was chosen because it had a narrow beamwidth and bandwidth with a high gain.

This is a directional antenna with a beamwidth of 16 degrees horizontal and 21 degrees vertical which is ideal for use in this specific antenna range.

Once the antenna was chosen, a link budget was written to make sure enough power is transmitted.

The link budget takes into account all the loss in the system and provides a number, in dBm, that should be transmitted in order to have a readable signal.  Using this number the antenna range team was able to make sure they were transmitting enough power to get good results.