Uni-Antenna Spatial Energy Compression Based on Unsteady Coherent Interference

In this work, the unique spatial energy compression phenomenon of uni-antenna frequency diverse system based on the unsteady coherent interference is explored comprehensively. By compressing the element spacing of linear frequency diverse array (FDA) to near-zero, the decoupling of angle dimension is significantly achieved from the conventional range-angle-dependent beampattern. Inspired by the ever-shrinking element spacing, the concept of uni-antenna frequency diverse system is firstly proposed. The relations between a series of parameters (i.e. the number of diversity, frequency offset values) and spatial energy distributions is investigated in-depth. The uni-antenna frequency diverse synthesizing method allows the focusing intensity and focusing period of transmitted energy to be flexibly adjustable. The electric intensity of the proposed uni-antenna frequency diverse system has at least 4dB more compared with that in conventional phased array at each special focusing ribbon, which brings a great improvement of SNR in radar detection. This system provides a very promising and potential research and development direction on collaborative detection scheme while integrating phased array technology. With energy compression and focusing in both angle and range dimensions achieved, illustrating that such interference fringes phenomenon of frequency diverse antenna system is more promising and suitable for high performance detection and ranging applications.