Physical Limitations of Phased Array Antennas
Artikel i vetenskaplig tidskrift, 2021

In this paper, the bounds on the Q-factor, a quantity inversely proportional to bandwidth, are derived and investigated for narrow-band phased array antennas. Arrays in free space and above a ground plane are considered. The Q-factor bound is determined by solving a minimization problem over the electric current density. The support of these current densities is on an element-enclosing region, and the bound holds for lossless antenna elements enclosed in this region. The Q-factor minimization problem is formulated as a quadratically constrained quadratic optimization problem that is solved either by a semi-definite relaxation or an eigenvalue-based method. We illustrate numerically how these bounds can be used to determine trade-off relations between the Q-factor and other design specifications: element form-factor, size, efficiency, scanning capabilities, and polarization purity.

Q-factor

Antennas

Optimization

electromagnetic radiation

Q factor

Floquet expansions

current distribution

Energy storage

antenna theory

optimization methods

Current density

Manganese

periodic structures

Phased arrays

Författare

Andrei Osipov

Chalmers, Elektroteknik, Signalbehandling och medicinsk teknik, Signalbehandling

Kungliga Tekniska Högskolan (KTH)

Jari Matti Hannula

Kungliga Tekniska Högskolan (KTH)

Patricia Naccachian

American University of Beirut

B. L.G. Jonsson

Kungliga Tekniska Högskolan (KTH)

IEEE Transactions on Antennas and Propagation

0018-926X (ISSN)

Vol. In Press

Ämneskategorier

Beräkningsmatematik

Reglerteknik

Diskret matematik

DOI

10.1109/TAP.2021.3069485

Mer information

Senast uppdaterat

2021-05-04