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A new 94-GHz 4×4 phased array frontend capable of two-dimensional scanning with orthogonal polarizations for wireless communications and sensing has been investigated. The proposed phased array frontend resolves the RF signal leakage and isolation dilemma encountered in typical systems employing a single antenna for both transmission and reception, effectively maximizing the system's dynamic range...
A microstrip quasi-horn antenna for UWB radars and sensors has been developed. The antenna achieves good performance in both frequency domain for CW signals from 0.3-6 GHz and time domain for monocycle pulses of various durations. The time-domain measurement, particularly, shows that the antenna can transmit and receive monocycle pulses effectively with minimum distortion, little ringing, and small...
The development of a new compact uniplanar antenna operating from 3.1 to 10.6 GHz for ultra-Wideband (UWB) systems is presented. The antenna overcomes potential problems caused by the coupling between the feed and antenna and meets the requirements for UWB applications, such as ultra-wide bandwidth, reasonable efficiency, satisfactory radiation properties, and linear phase characteristics. It occupies...
A new low-cost, low-power fully integrated CMOS transmitter-antenna was designed, built and tested for UWB systems. The CMOS pulse generator can generate monocycle and impulse signals with tunable pulse duration. The UWB antenna is integrated directly with the CMOS chip. The antenna has less than 18- dB return loss and can transmit and receive UWB impulse signals over the entire UWB bandwidth of 3...
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