As shown in FIG. 11B, the signal transformation circuitry of target device 1185 includes a first signal transformation chain including frequency multiplier 1194-1 and filter 1195-1, a second signal transformation chain including frequency multiplier 1194-2, and filter 1195-2, and an nth chain including frequency multiplier 1194-n and filter 1195-n.
It should be appreciated that although in the illustrative embodiment of FIG. 11B, the target device 1185 includes three or more transmit antennas (and, consequently, three or more signal transformation chains), in some embodiments, a multi-spectral target device may include only two transmit antennas and two signal transformation chains (e.g., all the components of target device 1150 whose labels end with “-1” and “-2,” but not those components whose labels end with “-n.” Additionally, although there are “n” separate transmit antennas shown as being part of target device 1150, that number of transmit antennas may be reduced by combining at least some of the transmit antennas (e.g., two transmit antennas) into a single transmit antenna using a multiplexer (e.g., duplexer). This may reduce the size of the target device.
