Abstract
This proof-of-concept communication demonstrates the feasibility of using a slide projector to steer the beam of a transmit array by adding solar cells and varactor diodes to each unit cell. By irradiating each solar cell with the light of different intensities from a slide projector, the measured phase of the wave transmitted by the 4×4 transmit array shifts within 92° at 4.26 GHz, while the variation in magnitude is measured within 4 dB. Different light configurations are identified via a searching algorithm to achieve peak/null beamforming in a particular direction. The beam of the prototypical 4×4 transmit array can be shifted by ±24° in terms of the peaks and -30° to 36° in terms of nulls. The concept of adding light modulation to the transmit array with a slide projector can provide update rates of tens of milliseconds with control of brightness and color distributed over a large area of the array.
Original language | English |
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Pages (from-to) | 5481-5486 |
Number of pages | 6 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 71 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Jun 2023 |
Keywords
- Beamforming
- light modulation
- reconfigurable slide projector
- transmit array
- varactor diodes
ASJC Scopus subject areas
- Electrical and Electronic Engineering