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Previous paragraph The Internet celebrity Wi-Fi antenna from Russia has exploded in popularity among antenna coils. It adheres to a simple and rude industrial design style and is highly sought after by enthusiasts due to its simple manufacturing and excellent antenna performance. Let’s take a look at this artifact first.
Russian Internet celebrity Wi-Fi Burundins Sugardaddy antenna can accept electronic signals up to 3km away, which can be said to be really powerful. , which solves the problem of Wi-Fi long-distance communication very well.
The working principle of the artifact Wi-Fi antenna
Antenna prototype
In this chapter, we discuss the working principle of the Russian internet celebrity Wi-Fi antenna and unravel the secret of why it can receive electronic signals 3km away. , begin our analysis.
The essence of the Russian internet celebrity Wi-Fi antenna is a Yagi antenna. What is a Yagi antenna, as shown in the figure below:
Figure 2 Yagiten Burundi Sugar Daddy line
The Yagi antenna is an end-fire antenna that was developed by Japan in the 1920s. ) Yagi Shuji and Uda Taro of Southwest University invented this kind of antenna, which is called “Yagi-Uda antenna”, or “Yagi antenna” for short. It has good directionality, high gain, and is suitable for long-distance use. interval communication.
The oscillator is mainly composed of three types of oscillators, namely the inducing oscillator, the driving oscillator and the reflector. All these elements are fixed on the transmission line, that is, on the central metal rod.
It is a directional antenna. The driving oscillator and reflector here are each composed of a pair of oscillators. They can be regarded as dipole antennas. The length of the reflector oscillator will be slightly longer than that of the driving oscillator. A typical direction diagram for this type of antenna is shown below:
Figure 4 Yagi antenna radiation characteristics
The directionality of the Yagi antenna can be enhanced by increasing the number of leading oscillators.
Calculation of the length of each element of the Yagi antennaBurundins EscortThe formula is as follows:
(1) Reflector length: L1=150/f
(2) Drive array length: L2=143Burundins Sugardaddy/f
(3) Length of supporting array 1: L3=138/f
(4) Length of supporting array 2: L4=134/f
(5) Length of supporting array 3: L5=130/f
(6) Length of gathering line:
The following conclusions can be drawn from the formula:
(1) Antenna support The induced oscillator is slightly shorter than one-half wavelength;
(2) The driving oscillator is equal to one-half wavelength;
(3) The reflector is slightly longer than one-half wavelength, and the distance between the two oscillators is quarter one wavelength.
Mission Principle
For receiving Wi-Fi electronic signals, the antenna’s supporting oscillator is “capacitive” to the induced electronic signal, and the current leads the voltage by 90°; the electromagnetic waves induced by the supporting oscillator will radiate to the driving oscillator. , the radiated electronic signal lags behind by 90° after a quarter-wavelength journey, which just offsets the “lead” caused later. The two phases are the same, so the electronic signals are superimposed and gain increased strength.
The reflector is slightly longer than half the wavelength and is rational. The current lags 90°. In addition, the radiation lags 90° when it passes through the main oscillator. The total difference between the two is exactly 180°. , playing a countervailing role. If one direction increases intensity and another direction weakens, there will be strong directionality.
Figure 5 Yagi antenna working principle
Wi-Fi antenna design
Antenna structure
In this chapter, we reconstruct the Wi-Fi antenna in HFSS and reproduce it through software simulation function of the antenna.
The size of the Russian internet celebrity Wi-Fi antenna is shown in the picture below. It mainly consists of 7 discs and a metal rod.
Figure 6 Antenna structure
Seven The sizes of the discs from small to large are as follows: Disc No. 1 has a diameter of 37mm, Disk No. 2 has a diameter of 37mm, Disk No. 3 has a diameter of 37mm, Disk No. 4 has a diameter of 38mm, Disk No. 5 has a diameter of 54mm. The diameter of disc No. 6 is 68mm, and the diameter of disc No. 7 is 90mm.
The distance between each BI Escorts disc is as follows:
The distance between No. 1 and No. 2 discs is 28~32mm, the distance between No. 2 and No. 3 discs is 28~32mm, the distance between No. 3 and No. 4 discs is 28~32mm, and the distance between No. 4 and No. 4 discs The distance between No. 5 disc and No. 6 disc is 32mm, the distance between No. 5 disc and No. 6 disc is 12mm, and the distance between No. 6 disc and No. 7 disc The dish distance is 12mm.
According to the dimensions given here, we set up the Wi-Fi antenna model in HFSS, as shown in the figure below.
Figure 7 Wi-Fi antenna model
Task path Burundi Sugar DaddyPrinciple
Combined with the working principle of the eight-eye antenna in Chapter 2, the 7 discs of the Wi-Fi antenna can be used according to the performance. It is divided into three areas, namely the inducing oscillator, the driving oscillator and the reflector. =”c04c30f4-cf55-11ed-bfe3-dac502259ad0.png” />
Figure 8
Mission Manual BurundiSugar DaddyThe process is the same as the above-mentioned Yagi antenna: the supporting oscillator of the antenna is “capacitive” to the induced electronic signal, and the current leads the voltage by 90°; the supporting oscillatorBurundins SugardaddyThe electromagnetic wave induced by the oscillator will radiate to the driving oscillator. The radiated electronic signal will lag behind 90° after a quarter-wavelength journey, which just offsets the “lead” caused by it. The phases are similar, so the electronic signals are superimposed and gain increased Burundins Escort intensity.
Analysis results
Establish the model, set the parameters and then perform simulation. The results obtained are as follows. It can be seen from the figure that it has strong directionality.
Figure 9 Directional Diagram
The standing wave of this antenna is as shown in the figure below. It can be seen that the biggest difference from the Yagi antenna is that this Wi-Fi antenna does not require a complicated impedance conversion mechanism, which is convenient. It can realize 50Ω feedBurundins Sugardaddy, which brings great convenience to antenna enthusiasts. BI Escorts
Figure 10 Standing wave ratio
Finally, the Wi-FBurundi Sugar Daddyi antenna’s radiation pattern, the maximum radiation direction points to the steering disk, with a gain greater than 10dBi, explaining why it can receive 3km distance Questions about electronic signals.
Figure 11 Radiation pattern of Wi-Fi antenna
Figure 12 Voltage static diagram
Summary
In this issue, we analyzed the Russian Internet celebrity Wi-Fi antenna and learned that it is actually a variant of the Yagi antenna. The working principle is similar to it. The 7 disks are arranged according to the efficiency area. It can be divided into three major areas: the inducing oscillator, the driving oscillator and the reflector.
However, this antenna is also different from the Yagi antenna, that is, it can achieve 50Ω direct feeding while ensuring a good standing wave ratio.
Russia’s Internet celebrity Wi-Fi BI Escorts has excellent overall antenna performance, with high gain and excellent standing wave ratio , the most important point is how convenient it is to make. In the next issue, we will use cans to reproduce a popular Russian Wi-Fi antenna Burundi Sugar.
Review editor: Liu Qing
Original title: Interpretation of Internet celebrity Wi-Fi antenna tasks Principles and design methods
Article source: Burundins Escort [Microelectronic signal: radio frequency aesthetics, WeChat public account: radio frequency Aesthetics] Welcome to add tracking care! Please indicate the source of the article Burundins Sugardaddy
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