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Radio frequency (RF Cable) basic theory

What is RF Cable? Radio frequency, referred to as RF Cable, is the abbreviation for high-frequency alternating electromagnetic waves. Electromagnetic waves are actually a relatively familiar concept. The figure below can roughly reflect this process. E represents the electric field and B represents the magnetic field. The phase and amplitude of the electric and magnetic fields at the same position on the axis will change with time. Generally, radio frequency (RF) is the general term for electromagnetic waves with an oscillation frequency between 300KHz and 300GHz, and is widely used in radar and wireless communications. 2. Basic characteristics of radio frequency In order to describe a given radio frequency signal, we can start from four perspectives: frequency, wavelength, amplitude, and phase. 2.1 Frequency and wavelength The frequency of electromagnetic waves is the frequency of electromagnetic field oscillation. Waves have cycles, and frequency (f) is the number of cycles the wave occurs in a given unit of time, measured in Hertz (Hz). The figure below shows the waveform per unit time of a signal with a frequency of 10Hz. The wavelength (λ) is the distance that the wave propagates in one cycle. When the propagation speed is constant, the wavelength is

TFT-LCD color liquid crystal display interface type LVDS interface

Introduction to LVDS interface Through the previous introduction, I believe everyone has a certain understanding of the TFT-LCD signal interface. Of course, in addition to the SPI, MCU, and RGB introduced earlier, the TFT-LCD signal interface also has various interface types such as LVDS, MIPI, eDP, HDMI, etc. , this issue introduces LVDS, an interface type that is widely used on the market. It mainly talks about the characteristics and signal composition of the LVDS interface. The LVDS interface is the abbreviation of Low-Voltage Differential Signaling interface. Each data line is divided into two, namely the positive pole and the negative pole. The two low-voltage differential signal lines are combined into one data line, relying on multiple A combination of these data lines is used to realize data interaction between the CPU and LCD. There are many working modes of this interface signal. According to different numbers of data lines, the interface can be subdivided into two types: 1port and 2port. These two types of interface signals can be divided into two types: 1port and 2port. Divided into 3line and 4line modes, the pin definitions are usually divided into two types: The first pin definition Single-channel LVDS: RXINx-, RXINx+ (if

What is LVDS wiring harness

LVDS (Low Voltage Differential Signaling) is a small amplitude differential signaling technology that uses very low amplitude signals (250mV~450mv) to transmit data through a pair of parallel PCB traces or balanced cables.   The current and voltage amplitudes flowing through the two parallel differential signal lines are opposite. The noise signal is coupled to the two lines at the same time. The receiving end only cares about the difference between the two signals, so the noise is canceled out. Since the electromagnetic fields around the two signal lines also cancel each other out, differential signal transmission has much smaller electromagnetic radiation than single-line signal transmission. In addition, this transmission standard uses current mode drive output, which does not generate spike signals caused by ringing and signal switching, and has good EMI characteristics. Because LVDS differential signaling technology reduces noise concerns, lower signal voltage amplitudes can be used. This feature is very important as it makes it possible to increase data transfer rates and reduce power consumption. Low drive amplitude means data can be inverted faster. Since the driver is in constant current source mode, the power consumption hardly changes with frequency, and the power consumption of a single channel is

Four common types of network cables

twisted pair cable(Network Cable) The Network Cable most commonly used for Ethernet is called “twisted pair” because there are pairs of wires twisted together in the cable. This is done to prevent electromagnetic interference from external sources and other nearby pairs. There are two main classifications of twisted pair cables.the first is shielded twisted pair (STP) and unshielded twisted pair (UTP). STPs have an extra layer of shielding that makes them more resistant to external interference and therefore have greater bandwidth maximizing capabilities than UTP. The disadvantage of this is that they are heavier and cost more. which is why their main use is in high-end applications where preventing interference is a top priority. The second classification is related to categories that are separated from each other based on the amount of data transferred per second. The categories used by the standards are Category 5e (1 Gbps) and Category 6 (10 Gbps), because the performance standards do not meet the modern needs of the IT industry. The category is obsolete.coaxial cable For those who grew up decades ago, you would have seen these cables used to connect TVs to home antennas and build the first Ethernet networks. They work by

Types and differences of network cables

In the intricate web of modern connectivity, Network Cable stand as the silent heroes, weaving together the digital landscape that defines our daily lives.Among these lifelines, the evolution from Cat5e to the promising realm of Cat8 unveils a journey of innovation and enhanced performance. Cat5e: Pioneering Enhanced Connectivity At the heart of many home and office networks lies Cat5e, the stalwart of connectivity. With its impressive bandwidth and transmission speed of up to 1000 Mbps, Cat5e takes the lead, ensuring smooth data transmission in everyday networking operations. Its superiority over its predecessor, Cat5, lies in its ability to minimize signal interference effectively, making it a preferred choice for various networking needs. Cat6a: Elevating Performance to New Heights Cat6 network cable supports higher frequencies and bandwidths, up to 10 Gbps (gigabits per second) transmission rate. It has lower signal loss and better anti-interference ability, enabling high-speed data transmission over longer distances. Therefore, Cat6 network cables are often used in network environments that require higher speeds and strong anti-interference performance, such as data centers, enterprise networks, and demanding home networks. Cat7: Fortifying Against Interference Cat7 network cable uses a four-pair shielded twisted pair (S/FTP) structure. Each pair of wires is surrounded by a

Flat lDC Cable puncture connection process?

Multi-terminal flat data cable puncture connection An insulation feedthrough connection (IDC), sometimes called an insulation feedthrough terminal (IDT), is a method of connecting wires to a connector or terminal without stripping the insulation. This method can also be used on wires without insulation. The puncture connection method has been recognized by the industry and is widely used in various types of connectors. An important part of feedthrough connections is ensuring compatibility between wires, connectors and assembly processes. Such as wire specifications, wire-to-wire specifications (for multi-core flat or ribbon cables) IDC Insulation thickness, type of insulation, processing methods used, or arrangement of cables and connectors can cause unreliable connections or electrical opens or shorts.   When making puncture connections to multi-terminal flat cable IDC, the following standards must be followed. Acceptable – Level 1, 2, 3 (1) The cable end is flush with the outer edge of the connector or protrudes no more than twice the cable thickness and does not violate the minimum electrical clearance. (2) There are slight machining marks, but there is no damage to the surface of the insulating material of the connector or cable. (3) If a foldback is used, the inside of the cable should

How does the IDC terminal work?

STABILITY The stability of the IDC terminal depends on factors such as the spring characteristics of the terminal head and the load capacity of the wire. From a design perspective, the IDC terminal is easier to control. At the same time, the elimination of external strain capacity prevents movement of the cable termination interface. For solid wire, with proper stress relief, performance will be better than IDC terminated crimping because of the higher inherent mechanical stability. This is because the terminal deflection energy is stored in the elastically maintained high voltage interface. Typically, for smaller wires, the terminal is designed to provide several pounds of force and several mils of elastic deflection at the interface. For larger wires, the force may be as high as 15 to 20 pounds.

What is a FIat lDC Cable connector?

What is an IDC connector? FIat lDC Cable connectors find many uses in computer-related technology. Although various forms of FIat lDC Cable connectors are used, the most widely used ones use flat ribbon cables, where multiple parallel connections are required. The letters FIat lDC Cable stand for Insulation Displacement Contact, or can be thought of as Insulation Displacement Connector. The name of the connector describes how it works: It is an electrical connector designed to connect to the conductors of an insulated cable through a specially designed connection point that runs through the simulation and connects to the wire. Cable, which overcomes the very time-consuming process of stripping insulated conductors before connecting to the pins on the connector. The Principle of Cold Welding in Connector Technology Cold Welding in Connector Technology: Insulation displacement connectors (IDC) rely on the principle of cold welding, where metals fuse under pressure without requiring high heat. This technique ensures high connectivity and reliability for electrical contacts, making it a cornerstone of IDC technology. Multi-way IDC Connector Design: Multi-way FIat lDC Cable connectors feature flat metal contacts with an angled upper area to position wires correctly. A lower U-shaped area is utilized to cut through insulation

The difference and selection between round cables and Flexible Flat Cable

From the physical properties 1. Difference in appearance: Flexible Flat Cable are flat in shape, while round cables are round in shape. Therefore, it is easier to add tensile galvanized steel wire to flat cables than to round cables. 2. Differences in the internal arrangement structure of cables: The internal conductor cores of flat cables are arranged in a uniform and orderly manner, mostly in a straight line arrangement or a plum blossom arrangement; while the internal conductor cores of round cables are mostly twisted, which also determines Round cables are cheaper to produce than flat cables. 3. The difference in physical properties: mainly reflected in the curvature and the number of bends. When the number of conductor cores is exactly the same, compared with round cables, flat cables have a larger bending amplitude and number of bends, and have a longer service life. From the chemical properties 1. Different heat dissipation: When the number of conductor cores is the same, flat cables have advantages in heat dissipation than round cables. 2. Different signal transmission directions: The circular structure has symmetry of circumferential distribution. Whether it is half-duplex or full-duplex transmission, it is better than the flat structure that is

Flexible flat cable applicable occasions and performance

Applicable scenarios for Flexible flat cable Flexible flat cable are suitable for mobile electrical power transmission lines and control, lighting, communication channels such as lifting equipment, cable tracks, trolleys, transmission machinery.Connection and installation of moving mechanical parts, etc. Compared with round cables： flat cables have the advantages of saving installation space and cost, and when the number of core wires is the same, their bending radius is smaller than that of round cables.   Flat cable performance: 1. The conductive core of the flat cable adopts a soft structure to ensure that the flat cable has good softness and performance. The insulation and protective layer materials are made of butylene polymer to improve the softness, anti-corrosion and cold resistance of the flat cable. The insulated cores are color-coded to facilitate the laying and installation of flat cables. According to customer needs, steel wire ropes or other load-bearing components can be added to both sides of the flat cable core. At the same time, the coaxial cable can also be made into an elevator flat cable for communication. 2. Flexible flat cable is a kind of flat cable that is wrapped with multiple strands of copper wire stranded conductors with insulating