Antenna Mutual Coupling Effects in Highly Integrated Transmitter Arrays

Abstract

The paper presents a consideration of the optimum initial phase distribution for 1-bit transmitarrays with near-field coupling feeding technique. The study is based on the array factor decomposition into a series of continuous aperture distributions, which naturally includes the phase quantization errors. The previously proposed virtual focus approach is compared with the optimum quadratic initial phase distribution. Both methods are found to be very similar for specific values of distribution parameters in terms of farfield performance. Some further sidelobes level improvement is proposed.

Co-Design and Validation Approach for Beam-Steerable Phased Arrays of Active Antenna Elements With Integrated Power Amplifiers

“…where we employed renormalized transmission coefficients from the drain port to T E 00 and T M 00 Floquet modes. The renormalized S-matrix S F W was computed from S F W [27] with the following port reference impedances replacement {D, G, DC D , DC G } = {17 − j46, 3 − j13.2, 0.5, 0.5} Ω. The PA gain compression can be seen in 6(a) as the variation of the ASEP peak level.…”

“…Future work will extend the proposed methodology to advanced beamforming scenarios where the AiUCs excitation may differ from the considered uniform amplitude distribution (e.g., tapered or MIMO array cases). The corresponding approach is based on the AiUCs mutual coupling analysis [27].…”

Fast Antenna Array Calibration Using One External Receiver

“…Again, the process is similar to that in (17) after modifying C −1 . This reduces the size of B to M × p instead of M × M, denoted by B and the unknown elements are denoted by q with a size of p × 1, as shown in Equations ( 22) and (23).…”

“…To prevent this problem, the transmit waveforms should have a constant modulus constraint (CMC) or low peak-to-average ratio (PAR) [8,22]. Because of this, the calibration of the transmitter is more challenging than that of the receiver [23].…”