A Broadband Conformal Phased Array Antenna on Spherical Surface

Abstract

A Ku-band wideband conformal array antenna with13×19elements is presented in the paper. The array has a spherical structure, and its element is a proximity-coupled stacked patches antenna with a cavity-backed ground plane. The stacked patches and the cavity produce multiple coupled resonances, which enhance the bandwidth of the element extremely. A simulated model with the reasonable dimensions is framed with the coupling analyses, and the effective simulated results and good computing efficiency are obtained simultaneously. The measured results of the center embedded element in the whole array show a bandwidth exceeding 40%VSWR<2, which is close to the simulated matching performance.

Eigenbeam Analysis of Singly Curved Conformal Antenna Array

“…This problem is solved in the proposed solution by computing the response of desired signal weights at nulls location and simply subtracting them to calculate the final array weights. In [18,19], optimization algorithms are used to calculate the excitation phases for the generation of single and multiple main beams; therefore, only single degree of freedom (phase) is available. The proposed solution computes both amplitudes and phases to give better control over nulls location and their depth.…”

“…In [14][15][16], wedgeshaped (singly curved) and cylindrical-shaped conformal antenna arrays are investigated to recover the broadside distorted radiation patterns without main beam scanning. In [17][18][19][20][21], beamforming using a conformal antenna array (other than singly curved) is presented with no or very little open information available on calculating the beamforming weights. The above mentioned study suggests that designing a beamforming conformal array with a simple technique and open information applicable to both small and large scale deformation angles is still awaited.…”

A Novel Versatile Approach for Underwater Conformal Volumetric Array Design

“…In fact, few existing designs in the literature have a mathematical background which could have facilitated more understanding of the conformal arrays [ 24 ]. The literature does not provide sufficient techniques to guide the design of a conformal array.…”

Wide scanned electronically steered conformal active phased array antenna for Ku-band SATCOM

“…Designs of conformal array antennas have been very attractive research field, and many significant investigations have been reported including the conformal waveguide slotted arrays and the conformal microstrip patch arrays. As compared with conformal waveguide slotted arrays, conformal microstrip patch arrays have the advantage of lighter weight, smaller size, and better integration with aircrafts body [5–7].…”