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Leaky Scanning

Leaky Scanning

During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...

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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

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Published on: February 4, 2018

Dual-Polarized Multi-Beam Fixed-Frequency Beam Scanning Leaky-Wave Antenna.

Dapeng Chu¹, Yong Mao², Haoxiang Li¹

¹Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China.

Sensors (Basel, Switzerland)

|June 10, 2023

Summary

This summary is machine-generated.

This study introduces a novel leaky-wave antenna (LWA) array capable of switching between multiple dual-polarized beams. This antenna technology offers flexible beam steering for advanced communication systems.

Keywords:

dual-polarized leaky-wave antenna (LWA)multi-beam satellite communication surface plasmon polaritons (SPPs)

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Published on: September 26, 2014

Area of Science:

Electromagnetics and Applied Physics
Antenna Theory and Design
Metamaterials and Plasmonics

Background:

Traditional antennas often have limitations in beam flexibility and polarization control.
The demand for adaptable antenna solutions is growing for integrated communication networks.

Purpose of the Study:

To propose and demonstrate a fixed-frequency beam-scanning leaky-wave antenna (LWA) array with switchable dual-polarized beams.
To enable flexible beam steering and adjustable beam width for enhanced communication capabilities.

Main Methods:

Utilizing three groups of spoof surface plasmon polaritons (SPPs) leaky-wave antennas with varying modulation periods.
Incorporating varactor diodes for independent beam steering control at a fixed frequency.
Configuring the antenna in multi-beam (2-3 beams) and single-beam modes.

Main Results:

Experimental demonstration of a prototype LWA array operating from 3.3 to 3.8 GHz.
Achieved maximum beam scanning ranges of approximately 35° in multi-beam mode and 55° in single-beam mode.
Demonstrated flexible adjustment of beam width by switching between modes.

Conclusions:

The proposed LWA array offers efficient fixed-frequency beam scanning with switchable dual-polarized beams.
This technology shows significant potential for space-air-ground integrated networks, satellite communication, and 6G systems.