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Waveguide-hologram-based wavelength-multiplexed pseudoanalog true-time-delay module for wideband phased-array
1Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758, USA.
Applied Optics
|March 6, 2008
Summary
A novel pseudoanalog true-time-delay module uses substrate-guided waves and wavelength-division multiplexing for compact, high-density phased-array antenna control. This technology offers continuously tuned delays across a wide bandwidth, simplifying system complexity.
Area of Science:
- Photonics and Waveguide Technology
- Antenna Systems Engineering
- Optical Signal Processing
Background:
- Phased-array antennas require precise true-time-delay (TTD) control for beam steering.
- Existing TTD systems can be complex and bulky.
- Integrating TTD functionality efficiently is crucial for advanced antenna applications.
Purpose of the Study:
- To present a compact pseudoanalog true-time-delay (TTD) module.
- To demonstrate a high-density fan-out capability for TTD signal distribution.
- To reduce the complexity of TTD systems for phased-array antennas.
Main Methods:
- Utilizing substrate-guided waves and wavelength-division multiplexing (WDM).
- Employing a two-dimensional waveguide hologram array for a 1-to-32 (5-bit) even fan-out.
- Developing a module with a packing density of 2.5 lines/cm² and compact dimensions (8 cm x 4 cm x 8 mm).
Main Results:
- Demonstrated a 1-to-32 even fan-out using a novel waveguide hologram array.
- Achieved a high packing density and very compact module size.
- Measured a device bandwidth of up to 2.4 THz.
- Obtained continuously tunable delay signals ranging from tens of picoseconds to several nanoseconds.
Conclusions:
- The presented pseudoanalog TTD module offers a compact and efficient solution for phased-array antenna control.
- The use of substrate-guided waves and WDM significantly reduces system complexity.
- The device's high fan-out capability and wide bandwidth are suitable for advanced antenna applications.
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