March 10, 2025

Smart antennas are divided into switch beams (such as 6-beam switching, response <5ms) and adaptive arrays (MIMO technology, beamforming gain up to 20dB). The former presets a fixed coverage direction, while the latter tracks users in real time and dynamically adjusts the phase, which can increase the capacity of 5G systems by more than 30%. […]

Dual antennas can work together (such as MIMO or relay), and need to be in the same frequency band (e.g. 2.4GHz±50MHz), with a spacing ≥ half a wavelength (6.25cm at 2.4GHz). Orthogonal polarization or isolator (isolation>20dB) to prevent interference, phase shifter to adjust the phase (within ±30°), combiner needs 50Ω impedance matching to ensure signal

Larger antennas generally perform better because their ​​physical size directly correlates with wavelength reception​​, improving ​​gain (3-10dB higher than compact antennas)​​ and ​​signal-to-noise ratio​​. For example, a ​​¼-wave VHF antenna (1.5m tall)​​ captures weaker signals more effectively than a ​​5cm stub antenna​​. Bigger antennas also provide ​​wider bandwidth (e.g., 20-30% increase)​​ and reduce multipath interference

The ​​highest gain antennas​​ are typically ​​parabolic reflector dishes​​, achieving ​​30–50 dBi​​ in ​​C/Ku-band (4–18 GHz)​​. Larger diameters ​​(3–10 meters)​​ enhance gain, with efficiency around ​​50–70%​​. For extreme gain ​​(60+ dBi)​​, ​​horn-reflector antennas​​ or ​​cassegrain feeds​​ are used in ​​deep-space communication​​. Precise ​​alignment (0.1° accuracy)​​ and ​​low-noise amplifiers (LNA)​​ maximize performance. Smaller alternatives like ​​Yagi-Uda

No, ​​coaxial cables​​ and ​​antennas​​ are not the same. A ​​coaxial cable (e.g., RG-6, 75Ω)​​ transmits RF signals with ​​low loss (3dB/100ft at 1GHz)​​, while an ​​antenna (e.g., Yagi, dipole)​​ radiates or receives electromagnetic waves. For ​​satellite TV​​, a ​​dish antenna (2.4GHz Ku-band)​​ captures signals, which are then carried via ​​coaxial cable​​ to the receiver.

Satellite antennas vary in size, such as Ku-band flat antennas with a diameter of about 0.45 meters, while C-band parabolic antennas can reach a diameter of 2 to 3 meters. The size should be selected based on the frequency, gain requirements and application scenarios. When installing, make sure to align with the satellite to maximize

The ​​best antenna for satellite communication​​ depends on the frequency and application. For ​​Ku-band (12-18 GHz)​​, a ​​parabolic dish (1.2-3m diameter)​​ offers high gain (30-40 dBi) and precise tracking. ​​Phased-array antennas​​ are ideal for ​​mobile systems​​, providing ​​rapid beam steering​​ without mechanical adjustments. ​​Helical antennas​​ excel in ​​circular polarization​​ for ​​L-band (1-2 GHz)​​ with 10-15

Antennas are used to transmit or receive electromagnetic wave signals, such as mobile phone antennas with a frequency range of 800MHz to 2.6GHz. Satellites are devices that operate in orbit and can forward radio signals. For example, communication satellites can cover about 90% of the world and provide television and telephone services. Antenna Functionality At

Satellite communication antenna types include: parabolic antenna (usually 1.2 meters in diameter, suitable for C band), flat antenna (light and thin, suitable for Ku band), helical antenna (supports circular polarization), phased array antenna (can electronically control the beam direction) and portable antenna (easy to deploy, about 0.6 meters in diameter). Choose the appropriate type according