초록 ▼

The single channel transceiver with polarization diversity is a target detion and tracking system that results from combining the well-established technology of single channel transceiver with that of microstrip polarization-diverse antenna. The single channel transceiver with polarization diversity

The single channel transceiver with polarization diversity is a target detion and tracking system that results from combining the well-established technology of single channel transceiver with that of microstrip polarization-diverse antenna. The single channel transceiver with polarization diversity transmits a pair of pulses of a pre-selected polarization sense toward a target object and receives two scattered pulses of orthogonal polarizations in rapid sequence. Thereupon, a second pair of pulses, this time of opposite polarization, is transmitted and, again, two scattered pulses of orthogonal polarizations from this second pair of transmitted pulses are received in rapid sequence. Thus, the single channel transceiver with polarization diversity has the capability to obtain the complete scattering matrix of a target by use of four transmitted pulses. The received scattered pulses are further processed by the transceiver to derive the polarization signature that is indicative of the nature of the object from which they scattered in reflection and thereafter used to identify the target among clutter or background.

대표청구항 ▼

[ We claim:] [1.] In a single channel transceiver having a pulse modulator for producing pulse trains, a signal processor for processing received scattered pulses and producing switching signals therefrom and a duplexer for maintaining separation between the transmitting and receiving functions of s

[ We claim:] [1.] In a single channel transceiver having a pulse modulator for producing pulse trains, a signal processor for processing received scattered pulses and producing switching signals therefrom and a duplexer for maintaining separation between the transmitting and receiving functions of said transceiver; an improvement for imparting polarization diversity to said transceiver such that radiant energy of differing polarization senses may be transmitted from or received by said transceiver, said improvement comprising a microstrip antenna, said antenna having a conductive strip, a conducting ground plane and a dielectric substrate sandwiched between the strip and the plane, a power connector coupling the strip with the duplexer, said antenna further having a first diode and a second diode, the first diode being located in a pre-determined position with respect to the second diode and each diode providing a conductive path between the strip and the ground plane so as to result in transmission and reception of radiant energy of pre-determined polarization senses upon selective application of voltages to the diodes; and a means for selecting and controlling the application of voltages to the diodes, said selecting means being coupled simultaneously between the modulator, the signal processor and said microstrip antenna.