June 5, 2025

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

An elevated feed antenna enhances signal quality by elevating the feed point, reducing ground loss and interference, typically improving efficiency by up to 50%. Definition of Elevated Feed Antenna An elevated feed antenna is defined as an antenna where the feed point is located above the ground lever . In some case, it can be

An array is a group of antennas working together to direct signals, enhancing control and strength, whereas an antenna is a single radiating element. Physical Structure Differences An array is composed of multiple antennas combined together to act as a single entity . The physical structure of an array is created by the configuration and

A triple feed antenna utilizes three feeds to enhance bandwidth and signal quality, improving performance across multiple frequency bands. Technical Specifications of Triple Feed Antennas Triple feed antennas are a standout example in the field of telecommunications and broadcasting due to their unique capability to effectively handle multiple corresponding frequency bands. To some extent, this

Axial or front feed antennas focus signals with high gain, typically over 30 dB, ideal for long-distance communication and radar systems. Introduction to Axial/Front Feed Antenna Axial or front feed antennas define the scope of modern communication systems. For instance, high-gain antennas are primarily used to communicate with satellites and deep-space probes. The uniqueness of

Coaxial feed in antennas is a technique that uses a coaxial cable to connect the antenna’s radiating element to the transmitter or receiver, ensuring efficient signal transmission. Coaxial Probe Feed A coaxial probe feed is a popular method used in antenna design, particularly in patch antennas. It is based on the use of a coaxial

The main types of antenna feed lines include coaxial cable, waveguide, microstrip line, twin lead, and balanced line, each with specific applications and characteristics. Coaxial Cable Coaxial cable is a type of transmission line that is used to carry high-frequency electrical signals with low losses. It is composed of a central conductor, an insulating layer,

TEM waves require open paths; closed waveguides enforce boundary conditions that TEM modes cannot satisfy, leading to no propagation. Mathematical Explanation One interesting point to consider is that electromagnetic waves, such as these used in communication systems, follow Maxwell equations. Transverse electromagnetic wave One class of waves, which different to others by the property that

Waves in a waveguide travel with specific modes, like TE or TM, at frequencies above the cutoff determined by the guide’s dimensions. Wave Propagation in Waveguides Wave propagation in waveguides is a fundamental aspect of modern telecommunication and microwave engineering domains. The ability to guide electromagnetic waves along the specified path allows for convenient signal