A novel stepped-amplitude aperiodic phased array synthesis method is proposed. The presented technique is based on iterative convex element position perturbations and uses pre-defined excitation amplitudes. A 64-element irregular array with two discrete amplitude levels (0.5 at the edge-elements and 1 at the center-elements) is synthesized for demonstration purposes. The array achieves a side lobe level lower than - 30 dB and a directivity higher than 20 dBi within the given field-of-view (±60 degrees in azimuth and ±15 degrees in elevation). Through comparative studies of the array directivity, effective isotropic radiated power and maximal side lobe level with the ones of the uniformly-fed/amplitude-tapered periodic arrays and a uniformly-fed aperiodic array, it is shown that the proposed stepped-amplitude array provides the best complexity/performance trade-off.
|Title of host publication||2021 15th European Conference on Antennas and Propagation (EuCAP)|
|Number of pages||5|
|Publication status||Published - 2021|
|Event||EuCAP 2021: 15th European Conference on Antennas and Propagation (EuCAP) - Virtual Conference at Dusseldorf, Germany|
Duration: 22 Mar 2021 → 26 Mar 2021
|Abbreviated title||EuCAP 2021|
|City||Virtual Conference at Dusseldorf|
|Period||22/03/21 → 26/03/21|
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- array synthesis
- phased arrays
- aperiodic arrays
- stepped amplitude arrays