Two overlapping antenna beams are formed, which are steered in slightly different directions, usually such that they overlap at the half-power point (-3 dB-point) of the beams. By comparing the relative amplitude of the pulse in the two beams, its position in the beams can be determined with an accuracy dependent on the signal-to-noise ratio (SNR). An accuracy of a tenth of beamwidth can be achieved with an SNR of 10 dB. Web7 Jul 2024 · An integrated optimization of sum and difference beam for time-modulated linear antenna array is studied in this paper. The goal of sum and difference beam synthesis is to generate sum beam in the… Expand 1 PDF View 1 excerpt, cites background Synthesis of Orbital Angular Momentum Antennas for Target Localization

STAP for clutter suppression with sum and difference beams

WebThe sum and difference multiple channels were usually applied to the monopulse system only in a receiver. But this paper presents a technique of multiple beam modulation … Web1 Apr 2000 · A unique approach for airborne radar clutter rejection is developed and evaluated. This spatial and temporal adaptive approach employs the sum and difference beams of an antenna, which has significant practical advantages because it can be implemented with no/little change to the front-end electronics of airborne systems where … bshim clohs

A Novel Metasurface-Based Monopulse Antenna with Improved Sum …

Web1 Jun 2024 · The measured results show that the difference beam null-depth is -25 dB and the sum beam gain is 15 dBi at 40°. The sum beam gain varies by less than 1.5 dB across the scan coverage from 30.8° to 45.2°. The measured results are found to be in good agreement with the simulated ones. Published in: IEEE Access ( Volume: 8 ) Article #: Web8 Nov 2024 · The measured results show that the gain ratio between the sum and difference beams is 2.8 dB and 3.7 dB, respectively. More importantly, the peak gain of the sum beam at 16 GHz is 27.1 dB, without considering the loss of the comparator, with a corresponding aperture efficiency of about 41.4%. Web24 Jul 2024 · The estimation of beam centre distance based on pitching sum and difference channels requires that the radar has at least the ability to receive radar echoes from the pitching sum and difference channels, and is able to measure the grazing angle of each range cell from the centre of the beam. Fig. 2 shows the geometric relationship diagram … excessive sweating treatment over the counter