Ultra-wide-band Antenna
Ultra-wide-band Antenna - Related Videos
02:35
Band Theory
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2020
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands. The energy difference between these bands is known as the band gap. Conductor, Semiconductor,...
05:21
Whole Mount Immunolabeling of Olfactory Receptor Neurons in the Drosophila Antenna
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Cited by 7 •
2014
Herein we describe the process of whole mount immunostaining of Drosophila antennae, which enables us to better understand the molecular mechanisms involved in the diversification of olfactory receptor neurons (ORN)s.
09:12
Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
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Cited by 14 •
2016
A protocol for the colloidal synthesis of silver nanocubes and fabrication of plasmonic nanoscale patch antennas with sub-10 nm gaps is presented.
01:15
The Antenna Complex
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2025
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
09:30
Localization of Odorant Receptor Genes in Locust Antennae by RNA In Situ Hybridization
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Cited by 5 •
2017
This paper describes a detailed and highly effective RNA in situ hybridization protocol particularly for low-level expressed Odorant Receptor (OR) genes, as well as other genes, in insect antennae using digoxigenin (DIG)-labeled or biotin-labeled probes.
FAQs
Broadband behavior depends on coordinating the radiating geometry with its feeding arrangement. Together, these features must maintain impedance matching over the intended frequency range, so less of the applied signal is reflected and useful radiation remains available. Design changes are therefore judged across the full operating band rather than at only one favorable frequency.
Voltage standing-wave ratio, or VSWR, indicates how effectively the antenna accepts energy from its feed. A suitable design keeps VSWR controlled across the intended band, because poor matching increases signal reflection and can reduce usable performance. Reviewing this parameter alongside bandwidth helps engineers distinguish genuinely broadband operation from a design that performs well only at selected frequencies.
Bandwidth alone does not determine whether an antenna is suitable. Engineers also balance gain, radiation pattern, polarization, physical size, and fabrication constraints. Enlarging or altering a structure may affect how energy is radiated or how the antenna fits into a system. The design target is therefore a coordinated compromise among spectral coverage, radiation behavior, and practical construction.
Radiation pattern and polarization describe how the antenna distributes and orients its radiated energy. These properties matter because a broad frequency range does not automatically guarantee the desired directional behavior or polarization relationship. Evaluating them across the operating range reveals whether coverage remains consistent enough for a wireless, radar, imaging, localization, or sensing system.
A practical evaluation examines bandwidth, gain, radiation pattern, polarization, and VSWR over the intended frequency range. Engineers compare these measurements with size and fabrication limits to determine whether the design meets system requirements. Looking at the parameters together is important: strong performance in one metric may not compensate for inadequate matching, radiation behavior, or physical feasibility.
Radar and imaging systems can benefit from the antenna’s broad spectral coverage because it may improve resolution. The same frequency span also supports system flexibility when different parts of the spectrum contribute to sensing or observation. Engineers still need to verify gain, radiation pattern, polarization, and matching across that span before concluding that the antenna meets the application’s needs.
Short-range communications, localization, and sensing use ultra-wide-band antennas when spectral coverage and frequency flexibility are important. In communications, the available bandwidth can support high data rates; in localization and sensing, broad coverage can support system adaptability. The appropriate design depends on how these benefits interact with gain, pattern, polarization, VSWR, size, and fabrication constraints.