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The paper describes how beamforming and monopulse techniques can be applied to an array of sequentially-fed, circular polarized, ultra-wideband array. By exploiting the same sequentially-fed antennas for beamforming and monopulse, we can achieve better target tracking, without increasing the antenna array size. The design equations of our proposed method, for the radar transceiver, are derived. To...
In this paper, we have presented the transmitter, antenna array, transmission and evaluation of the circularly polarized ultra-wideband signal at boresight direction. From measurements, it has been shown that, in the frequency band of 2.6-5.5 GHz, the transmitted signal has axial ratio of < 1 dB, polarization tilt between plusmn30deg, and left-hand polarization sense.
In the ultra-wideband monopulse receiver, the incident signal is received with two receiving antennas in sum and difference mode. The received signals' phase and energy are then compared to find the incident signal. The received signals, however, are susceptible to antenna noise. In this paper, we establish the relationship between the angle accuracy of the proposed receiver and the signal-to-noise...
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