Fractal Antennas
Maximum antenna radiation efficiency occurs at resonance frequency and is operable near resonance frequency.
Away from resonance frequency, the antenna is not efficient radiator, hence is not antenna any more.
This phenomenon is more of concern at low frequency where antenna size is large.
Therefore, miniaturization of antenna and adequate bandwidth are prime design goals.
Fractal antennas are meant to address the miniaturization and bandwidth by changing the antenna geometry in a such way to increase its effective electrical area for given space.
For instance, dipole antenna resonates around half wavelength of the operating frequency.
By indenting the dipole, it can resonate below half wavelength, as the indentation increases the dipole aperture hence reducing the resonance frequency.
The indentation technique can be applied to many antennas’ topology in order to increase the antenna effective electrical aperture.
The indentation cause acceleration/deceleration of electrons over a longer aperture, hence electrically the antenna appears larger.
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Sinuous Antenna
Log periodic antennas provide multi octave fractional bandwidth.
Sinuous antenna structure scales to multiple wavelengths gradually.
Therefore, it resonates at all of those wavelengths, consequently it has ideal antenna reception properties for UWB applications.
Sinuous antennas can be conformed to the desired space and be low profile.
Sinuous antenna radiation pattern is omni directional, hence low gain.
Consequently, they could be used in antenna array to achieve higher desired gain with proper array synthesis based on the application’s requirements.
ORTENGA helps businesses to identify required technical features to realize their business goals.
ORTENGA provides structured engineering leadership across antenna architecture, realization planning, integration, and deployment validation to reduce downstream realization risk and improve alignment between engineering execution and business objectives.
→ Explore ORTENGA Structured Execution Model
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Vivaldi Antenna
Log periodic antennas provide multi octave fractional bandwidth.
Tapered Vivaldi antenna structure scales to multiple wavelengths gradually.
Therefore, it resonates at all of those wavelengths, consequently it has ideal antenna reception properties for UWB applications.
3D and 2D Vivaldi antennas are used for various applications both in receiver and transmitter chains.
Vivaldi antennas have some gain that can be tailored for specific applications as single element.
Vivaldi antennas can also be used in antenna array to achieve higher gain, consequently lower beamwidth for beamforming applications.
ORTENGA helps businesses to identify required technical features to realize their business goals.
ORTENGA provides structured engineering leadership across antenna architecture, realization planning, integration, and deployment validation to reduce downstream realization risk and improve alignment between engineering execution and business objectives.
→ Explore ORTENGA Structured Execution Model
→ Assess Your Project Risk Profile