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In this paper, we present our design of a v-band patch array for compact, lightweight, and power efficient drone radar. The 60 GHz radar has a bandwidth of 7GHz. Several compact V-band antennas, such as Yagi, patch, aperture coupled and dual-slits patch antenna are studied and compared. The impact of different antenna design on the compact radar board geometry and quality of performance was analyzed.

Bitstream Modulated transmitters based on Delta Sigma Modulation have been proved to be promising for efficient amplification of non-constant envelope signal. Such transmitters preserve signal linearity by converting the signal to binary envelope and shaping the quantization noise out of signal band. To further suppress the noise near the in band signal that is left from noise shaping, active FIR filter structure consisting of multiple identical amplifier units is proposed. In this paper, the Channelized Active Noise Elimination (CANE) technique is employed to create an effective band-pass FIR filter by delaying, up-converting the baseband signal and then combining them in RF. A special power combining network is designed to maintain the overall PA efficiency while the noise power is suppressed. An S-band transmitter prototype with 2-channels has been built and tested. The results demonstrated that the CANE technique can achieve filtering with software reconfigured flexibility while maintaining the power efficiency.