Sidelobe Level (SLL) Genetic Algorithm (GA)
A 8x1 Sprout-Shaped Antenna Array with Low Sidelobe Level of -25 dB
... has the dimensions of 165 mm × 195 mm × 1.575 mm and is designed on Rogers RT/Duroid 5870tm with the thickness of 1.575 mm and permittivity of 2.33. In order to achieve low SLL, Chebyshev distribution weights (preset ...
6
Analysis of Sidelobe Level and Beamwidth of Uniform Concentric Circular Arrays Utilizing Kaiser Amplitude Weighting
... higher sidelobe level (approximately 8 dB below the main lobe) especially when utilized in two-dimensional beamforming and the array is inefficient if utilized at angles near to the normal of the ...higher ...
6
Nonuniformly Spaced Linear Array Design for the Specified Beamwidth/Sidelobe Level or Specified Directivity/Sidelobe Level with Coupling Consideration
... MINIMUM SIDELOBE LEVEL (PENCIL BEAM) In this section, with nonuniform spacing, for tightly specified beamwidth between first nulls (BW), the minimum achievable sidelobe level is ...
25
Ultra low range sidelobe level pulse compression waveform design for spaceborne meteorological radars.
... range sidelobe level is degraded when the returned signal is subject to Doppler frequency shifts (especially for nonlinear frequency ...range sidelobe specification as a function o f rainfall rate ...
208
Sidelobe-Level Suppression for Circular Antenna Array via New Hybrid Optimization Algorithm Based on Antlion and Grasshopper Optimization Algorithms
... side-lobe level (SLL) of antenna arrays is a significant factor that can enhance the reliability and validity of a communication ...side-lobe level of the array’s radiation ...
15
Low Power LFM Pulse Compression RADAR with Sidelobe suppression
... This section includes some of the discussions of journal papers on RADAR pulse compression techniques. Shinriki, et al., [8] have proposed a new pulse compression method for simple pulse. This method has a filter whose ...
8
Synthesis of Linear Antenna Arrays using Accelerated Particle Swarm Optimization Algorithm
... Several pattern synthesis methodologies are obtained using phase only control have been described [6-10]. Phase only beam shaping in a uniformly spaced array has been presented by Chakrabarty [11]. In [12], numerical ...
7
Abstract- Array antennas are popular compared to discrete antennas as it is possible to control the radiation
... of sidelobe levels and their structural ...The sidelobe level in all cases is about -45 ...low sidelobe patterns synthesized by GA, SA and PSO are useful in point to point communication and ...
9
Non Linear Frequency Modulated Nested Barker Codes for Increasing Range Resolution
... peak sidelobe level and low integrated ...Multi level bi-phase pulse compression codes (MBPPC),sidelobes are lowered [10,11] but its drawback is energy ...the level of the side lobes is ...
9
Radar Imaging of Sidelobe Suppression Based on Sparse Regularization
... Synthetic aperture radar based on the matched filter theory has the ability of obtaining two-di- mensional image of the scattering areas. Nevertheless, the resolution and sidelobe level of SAR imaging is ...
8
Waveform design for spaceborne synthetic aperture radar
... required level will reach up to 67 ...dB sidelobe level, a highly s tric t condition would have to be introduced according to th e dynam ic ...insufficient level of -42 ...' level m ...
225
AMPLITUDE ONLY PATTERN SYNTHESIS OF ARRAYS USING GENETIC ALGORITHMS
... Results for optimizing the relative sidelobe level of a linear array of 100 elements are presented. Fig. 3. is shows the radiation pattern of an array of 100 point sources scanned to 0 0 after 50 ...
8
Synthesis of a Linear Antenna Array for Maximum Side lobe Level Reduction
... Lobe Level (SLL) of antenna arrays to save power and improve Quality of Service (QoS) by ensuring maximum radiation in desired direction, several methods are available in ...first sidelobe level of ...
5
A COMPARATIVE STUDY OF PATTERN SYNTHESIS OF NONUNIFORM CIRCULAR ARRAYS USING FIREFLY, BAT AND CUCKOO SEARCH ALGORITHMS
... minimum sidelobe level (SLL) and maximum directivity while first null beam width is not allowed to exceed the subsequent values obtained with uniform circular ...
9
Assessment of Weighting Functions Used in Oppermann Codes in Polyphase Pulse Compression Radars
... Usually the ambiguity diagram analysis is difficult, so it is showed in two dimensions. Autocorrelation function of Oppermann code with length N=100 for various Doppler shift is shown in the Figure 7. Increase of Doppler ...
7
Parallel Beamformation Method to Enhance Ultrasound Images
... simultaneously. In addition, this method has advantages over similar methods based on nonlinear processing of received echoes, which are higher performance in reduction of the sidelobe level and higher ...
6
Application of Complete Complementary Sequence in Orthogonal MIMO SAR System
... optimal sidelobe level performance, which is satisfied with the requirement of the orthogonal Multiple Input Multiple Output (MIMO) radar ...high sidelobe level in Synthetic Aperture Radar ...
16
INVESTIGATIONS ON RADIATION BEAM SHAPING
... Uniform linear arrays are analyzed and designed by several authors [1-3]. They yield radiation patterns with one main lobe and symmetric side lobe levels. Radiation patterns are specified in terms of main beamwidth and ...
13
A Robust Direct Data Domain Least Squares Beamforming with Sparse Constraint
... the sidelobe level of the beam pattern is ...lower sidelobe level and deeper null for interference while the robustness against steering vector mismatch is increased when a proper ...
13
Analysis of Non Linear Frequency Modulation (NLFM) Waveforms for Pulse Compression Radar
... Figure 8 shows the flow of the simulation system to evaluate the Doppler effect of the compressed signal. The first and second process of the simulation is to generate the NLFM complex signal that has been added with the ...
8