771 antennaThe domestic 771 antenna was a radio antenna product with excellent performance and was widely used in the field of communication. Its research and development had improved the level of domestic communication technology and made positive contributions to national security and development. The antenna has the advantages of high definition, high sensitivity, etc. It can receive more TV signals, improve the level of TV equipment, and provide a better viewing experience for the audience. Compared with the Eagle antenna and the Diamond antenna, the domestic 771 antenna had similar characteristics and performance, and was considered a cost-effective antenna choice. However, specific information about the performance and advantages of the domestic 771 antenna was not provided in the search results.
771 antennaThe domestic 771 antenna was a common walkie-talkie antenna. The domestic 771 antenna had similar characteristics and performance compared to the Eagle antenna and the Diamond antenna. It was considered a cost-effective antenna choice. However, the search results did not provide more information about the specific performance and advantages of the domestic 771 antenna. Therefore, the detailed evaluation and comparison of the domestic 771 antenna required further information and investigation.
Parabola antennaParabola antenna is an important part of the antenna. Usually, a metal rotating parabolic surface, a cut rotating parabolic surface, or a cylindrical parabolic surface was used as a reflective surface.
There were certain requirements for the material of the reflective device:
1. ** Conductivity **: Must have good electrical conductivity to ensure effective reflection of electromagnetic waves.
2. ** Surface smoothness **: The surface should be as smooth as possible to reduce scattering loss during reflection.
3. ** Weight **: For antennae that need to be moved or installed in special locations, the weight of the antenna is an important factor.
4. [Weatherability: Requires good weather resistance and long-term stability in various climates.]
5. ** Cost **: Material cost and processing cost are also important considerations.
The common materials for the mirrors were as follows:
1. ** Metal Material **
- [Aluminium-type material: One of the most commonly used materials. It has good electrical conductivity and machinability, and the cost is relatively low.]
- Copper: Its electrical conductivity is better than that of aluminum, but it costs more. It is usually used for applications that require extremely high reflective efficiency.
- ** stainless steel **: has good corrosion resistance and mechanical strength, suitable for outdoor applications, but the cost is higher.
- ** Metal coating **: For example, the surface of aluminum or copper is plated with silver to improve reflection efficiency and reduce loss.
2. ** Compound Material **
- ** carbon fiber composite material **: lightweight and high strength, suitable for applications that require weight reduction, such as the antenna on spacecraft.
- Glass fiber reinforced plastic (fiber reinforced plastic): Low cost, good weather resistance, but reflective efficiency is not as good as metal materials.
3. ** Coat Material **
- Metal coating: For example, a thin layer of metal, such as aluminum or copper, is plated on the surface of a plastic or composite material.
- ** Conductive paint **: A paint containing metal powder, coated on the surface of the reflective device, suitable for low-cost and fast installation applications.
In different application scenarios, the choice of the reflective material needed to consider a variety of factors:
1. ** Conductivity and loss **: The better the material's conductivity, the higher the reflection efficiency and the lower the loss. Copper had the best electrical conductivity, followed by aluminum, but the cost of copper was correspondingly higher.
2. Weight and stability: For antennae that need to be moved frequently or installed in specific locations (such as satellites or airplanes), lightweight materials such as carbon fiber composite materials are a better choice.
3. ** Weatherability and maintenance **: The antenna that works in harsh environmental conditions needs to be made of materials that are resistant to corrosion and ultraviolet-light to reduce maintenance costs.
4. ** Cost-effectiveness **: Considering the performance and cost, choose the material that is most suitable for the specific application.
5. ** Usage environment **: Wind pressure resistance, corrosion resistance and other factors need to be considered for outdoor applications; more cost factors can be considered for indoor applications.
6. ** Range of frequency **: The performance of the material is different at different frequencies. You need to choose the appropriate material according to the working frequency.
7. ** size and shape **: For a large antenna, the mechanical strength and stiffness of the material may need to be considered; for a small antenna, the weight of the material may be more important.
For example, satellite communications usually used aluminum alloy or carbon fiber composite materials to ensure lightness while ensuring sufficient mechanical strength; the large radio telescope in radio astronomy often used aluminum alloy or stainless steel to ensure good surface smoothness in large size; the miniaturized parabolic antenna of mobile communication base stations may use metal coating or conducting paint to reduce costs.
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Shockwave in TransformersShockwave was a virtual character in the " Transformers " series. He was one of the powerful and awe-inspiring Decepticon warriors. He was also one of the few characters who could fight Megatron alone and survive. Megatron had a high opinion of him. He was loyal, smart, and logical.
His cannon arm was connected to the nuclear reactor on his back and could emit various forms of radiation waves, such as electromagnetic spectrum, X-rays, infrared rays, radio waves, and so on. It could also emit powerful energy waves.
Shockwave played an important role in the story of Transformers. He was the second in command of the Decepticons, second only to Megatron in terms of intelligence and combat power. When he was on planet Cybertan, his transformed spear was in the form of Cybertan. As the commander of the remaining forces in Cybertron, he had suppressed the autobots 'resistance for four million years. During this time, he had been in constant contact with Megatron. In the animated movie, they sacrificed themselves to defend against the invasion of the Cosmic Emperor.
In addition, in different versions, he could not only transform into a gun, but also into a Cybertron warship and a super tank. He had participated in the early stages of the creation of the Decepticon army and guarded Cybertron for millions of years in the middle. He had also used technical means to help the Decepticons develop the Combined King Kong, Second King Kong, and Third King Kong.
In terms of peripheral products, there were many Shockwave toys launched by different brands. For example, the assembled version of Shockwave produced by Sansky had a near-perfect body proportion and a well-defined mechanical structure. The small Shockwave launched by Rubik's Cube had a high degree of completion in the appearance, beauty, reduction, and proportion. The Shockwave launched by NAC was more in line with the G1 model. The breathing light effect was added to the chest and gun head. It was better in painting and workmanship, and it was more playable.
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Mirror ShockwaveMirror Shockwave was a character in the Transformers Mirror Universe. The Mirror Universe was one of the many TF parallel universes, and its unique feature was the reversal of the positions of the righteous and evil. In this universe, the shockwave mirror image had a related story setting, such as a scientific research trip to Earth. In the old version of the Mirror Universe story, the soul of the main universe's shockwave passed through the long arm of the Decepticon member of the Mirror Universe. In terms of Transformers toys, there were products like the NAC Mirror Arm that were based on the Mirror Shockwave. It used their own Knight's remolding and repainting. The overall size was obviously different from the original big wave. The whole body was transparent, and one had to pay attention to the strength when playing. The transformation process was simple and smooth. The small sports car in the form of a vehicle had strong integrity and the feeling of pushing the cart was good. There were also primary color versions and transparent versions to choose from. The price was relatively cheap, and it could be used as a collection of the unpopular big wave image. In addition, the Starhowl Workshop had adopted the character settings of the botcon mirror shockwave/long arm. The body was in the form of an Asian limited wheel + folk head modification. It was expressed in a metallic color and subjective ideas were added to the color matching. The model had excellent human proportions and was mobile.
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Analysis of the relationship between Soundwave and Shockwave in 'soundwave x shockwave fanfic'Well, in 'soundwave x shockwave fanfic', it depends on the writer's interpretation. Some may focus on their professional relationship as comrades in the Decepticon cause. For example, they could be working together to develop new weapons or technology for the Decepticons. Others might explore a more personal side, like a rivalry that has deeper roots in their past experiences or a hidden admiration that one has for the other. It's all about how the fanfic creator wants to mold their relationship to tell an engaging story.
Reflecting body antenna structureThere are many types of reflective antenna structures. Its reflective surface is generally a parabolic surface, and its shape can be a circular parabolic surface, a cut parabolic surface (rectangular or oval cross-section), and so on.
Small-caliber mirrors often used a thin shell structure with some reinforcement ribs. For size antennae, the main frame was needed to support the reflective panel, which was usually a lattice structure. The main skeleton of the circular parabolic antenna often adopted a radiant structure, which was composed of several radiating beams and rings, while the main skeleton of the non-circular cross-section antenna often adopted a lattice structure.
When designing the antenna structure, the following problems should be considered: determining the type of the reflective surface; determining the type and specific structure of the main frame of the reflective body; determining the material and manufacturing process of the antenna structure; analyzing the load on the antenna, calculating the strength and stiffness of the antenna structure; demonstrating the surface accuracy of the reflective body; determining the surface accuracy test plan of the antenna; determining the installation and transportation plan of the antenna, etc.
In addition, there is also a reflective antenna structure, which includes a penetrative antenna and a magnetic reflective module. The magnetic reflective module is arranged beside the penetrative antenna, and the positive projection of the penetrative antenna on the plane where the magnetic reflective module is located is overlapped with the magnetic reflective module, and the reflection phase difference of the magnetic reflective module is between 90 degrees and +90 degrees. The magnetic reflective module includes a first base plate, multiple first metal patches, a first ground layer, and multiple first through holes. The first base plate includes a first face and a second face that are opposite to each other. The first face faces the penetrating antenna, the multiple first metal patches are arranged on the first face in an array manner, the first ground layer is arranged on the second face, and the multiple first through holes are located between the multiple metal surfaces and the ground layer and conduct the multiple first metal patches to the first ground layer. The diameter of each first metal patch is between 1 mm and 2 mm, and the distance between two adjacent first metal patches is between 0.1 mm and 0.2 mm. The length of each first via hole is between 0.5 mm and 1 mm, and the diameter is between 0.2 mm and 0.5 mm. The shape of each first metal patch can be a hexagon or a circle. The distance between the magnetic reflective module and the penetrative antenna is between 0.6 millimeters and 1.2 millimeters. If the reflective antenna structure is used to reflect electromagnetic waves of a frequency band, the distance is between 0.05 to 0.1 times of the frequency band. The transmission antenna also has many structural forms, such as including a second base plate, a third base plate, a liquid crystal layer disposed between the two, a first and a second electric layer disposed on the second and third base plates, or including a fourth base plate, a fifth base plate, a second ground layer, a second metal patch, a third metal patch, and so on.
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