Super cheap LoRa node with PCB antenna
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- Автор: Super User
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- Категория: Электроника / cхемотехника
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FreeCAD - Import and Edit SVG files
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- Автор: Super User
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- Категория: Компьютерная повседневность
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LoRA miniaturing: Split Ring antenna with very good SWR
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- Автор: Super User
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- Категория: Электроника / cхемотехника
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Concept and analysis of a coupled split-ring resonator for wide-/dual bands, self-filtering, high out-of-band suppression and highly efficient antennas
LilyGO®TTGO T-Impulse
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- Автор: Super User
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- Категория: Электроника / cхемотехника
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The T-Impulse is an example of cutting edge technology. It contains (some of the most popular):
- STMicroelectronics STM32L073Z Low Power MCU ;
- Semtech SX1276 Long Range Low Power RF Transceiver with TCXO clock source ;
- Sony CXD5603GF Low Power GNSS Receiver ;
- TDK InvenSense ICM-20948 Inertial Measurement Unit ;
- 0.49" I2C OLED display
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In the air:
Aircraft, UAV or balloon onboard location beacon.
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On the ground:
One can use it to track an elderly relative, kid, pet, alpine climber, vehicle & etc. location.
Just turn your Bracelet on, then wait until the device will pick GNSS satellites up. It will start transmitting automatically afterwards.
By default, the Bracelet is configured to operate over FANET radio protocol. You can further select other protocol through .
When other air traffic with the same radio protocol been enabled will fly around - the pilot will be able to see you and avoid.
You may consider to use it in conjunction with SoftRF
HALO antenna what is it. An effective small antenna
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- Автор: Super User
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A halo antenna, also known as a halo, is a specific type of antenna that consists of a center-fed dipole antenna. The dipole, which has a length equal to half the wavelength, is bent into a circular shape with a break directly opposite the feed point. The ends of the dipole are positioned close to each other but do not touch. By modifying the cross-section of the ends, an air capacitor can be formed. The spacing of this capacitor is adjusted to fine-tune the resonant frequency of the antenna.
Typically, the halo antenna is mounted horizontally. In this configuration, it exhibits an approximate omnidirectional radiation pattern, meaning it radiates equally in all directions around the horizontal plane. Moreover, the radiation from this antenna is horizontally polarized, which means that the electric field of the radiated signals is primarily oriented in a horizontal direction.
Overall, the halo antenna's unique design and characteristics make it well-suited for applications where omnidirectional coverage and horizontal polarization are desired.
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