Abstract: In this letter, a high-order mode (TE340-mode) empty substrate-integrated cavity (ESIC) fed high-gain circularly polarized 2 × 2 patch antenna array is presented. By using the ESIC ...

Abstract: An active research topic in the array signal processing field is the direction of arrival (DOA) estimation, where establishing an efficient estimation of radio waves received from an antenna ...

Copyright 2026 The Associated Press. All Rights Reserved. Copyright 2026 The Associated Press. All Rights Reserved. President Donald Trump said Friday he was ordering ...