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Long Wire Antenna Theory: Types, Working Principles and RF Testing Applications
In antenna theory, the relationship between antenna length and operating wavelength is one of the most important factors that affects radiation performance. A long wire antenna is a typical example. Unlike a short dipole or half-wave dipole, a long wire antenna usually h...Read more -
Antenna Theory: What Is a Short Dipole Antenna?
A short dipole antenna is one of the basic models used in antenna theory. It is a simple linear wire antenna whose total length is much smaller than the wavelength of the operating signal. Although the structure looks very simple, the short dipole is an important referen...Read more -
Antenna Theory: Understanding the Full-Wave Dipole Antenna
What Is a Full-Wave Dipole Antenna? A full-wave dipole antenna is a linear dipole antenna whose total conductor length is approximately equal to one wavelength at the operating frequency. In other words, if the wavelength is represented by λ, the overall length of the di...Read more -
Antenna Theory – Half-Wave Folded Dipole
A folded dipole is an antenna consisting of two parallel conductors connected at both ends, forming a closed loop‑shaped structure, with the feed point at the center. The total length of the antenna is half a wavelength, which is why it is also called a half‑wave folded ...Read more -
Antenna Theory – Half-Wave Dipole
A dipole antenna is cut and bent to achieve efficient radiation. The total length of the wire used as the dipole is equal to half a wavelength (i.e., l=λ/2）.This type of antenna is called a half-wave dipole antenna. Due to its advantages, it is the most widely used ante...Read more -
Antenna Theory – Wires
Wire antennas are one of the basic types of antennas. They are well‑known and widely used. To better understand wire antennas, let us first take a look at the transmission line. Transmission Line A transmission line, or wire, carries electrical energy f...Read more -
Antenna Theory – Poynting Vector
Antennas transmit or receive information by radiating electromagnetic energy. Therefore, energy and power are key parameters associated with these electromagnetic waves, and it is essential to discuss them. An electromagnetic wave consists of both an electric field and a...Read more -
Antenna Theory – Beamwidth
In the radiation pattern of an antenna, the main lobe represents the antenna's main beam, through which the maximum and most concentrated energy is radiated. Beamwidth is the angular width of the aperture through which the majority of the power is radiated. The two main ...Read more -
Antenna Theory – Beams and Polarization
This chapter discusses the parameters of antenna radiation beams, which help us understand beam specifications. Beam Area According to the standard definition: “If the radiation intensity P(θ,ϕ) remains at its maximum value ove...Read more -
Antenna Theory — Isotropic Radiation
In the previous chapter, we discussed radiation patterns. To better analyze antenna radiation, a reference point is required. The radiation of an isotropic antenna fulfills this role. Definition Isotropic radiation refers to radiation from a point sourc...Read more -
Antenna Theory – Radiation Patterns
Radiation is a term that describes the intensity of the electromagnetic waves transmitted or received by an antenna. In any antenna illustration, the diagram depicting the antenna's radiation characteristics is known as its radiation pattern. By observing the radiation p...Read more -
Antenna Theory – Near Field and Far Field
Following the discussion of fundamental antenna parameters in the previous chapter, another important topic to consider is the near-field and far-field regions of an antenna. The radiation intensity measured close to the antenna differs from that measured at a distance. ...Read more
