Time-Modulated Antenna Array with Beam Steering Based on Single-Pole Double-Throw Switches and Four-State Phase Shifters
- Resource Type
- Conference
- Authors
- Bogdan, Grzegorz; Yashchyshyn, Yevhen; Maneiro-Catoira, Roberto; Castedo, Luis
- Source
- 2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2023 XXXVth. :1-4 Aug, 2023
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Geoscience
Photonics and Electrooptics
Robotics and Control Systems
Signal Processing and Analysis
Phased arrays
Beam steering
Frequency modulation
Patch antennas
Phase shifters
Switches
Amplitude modulation
- Language
- ISSN
- 2642-4339
Beam steering in antenna arrays is usually accomplished acording to the phased array concept with phase-shifters incorporated into the feeding network. The steering resolution typically depends on the number of phase-shifter states, i.e., larger number of states enables finer resolution. For instance, a typical phased array with four-state phase-shifters provide the steering resolution of 30° only. This paper shows that beam-steering resolution as fine as 1° can be obtained even with four-states phase-shifters when the time-modulated antenna array approach in adopted. This aproach is based on periodic time modulation of the antenna array excitation signals. The time-modulated antenna array presented in this paper incorporates four-state phase shifters and single-pole double-throw switches which are used to periodically modulate the excitations. The beam-steering angle depends on the delays applied to the switch-controlling signals. The concept presented in this paper is examined by electromagnetic simulations of a sixteen-element patch antenna array.