Semi-Rigid Cable

Introduction

As the name implies, semi-rigid cable is not easy to be bent and formed. Its outer conductor is made of an aluminum tube or copper tube. Its RF leakage is very small (＜ - 120dB), and the signal crosstalk caused in the system can be ignored.

Structure

The most basic form of the semi-rigid SMA cable is a coaxial transmission line constructed of metal tubing. Wherein, the metal tube used is generally a copper tube forming an outer conductor, and a wire conductor is provided along the center line of the copper tube. The center wire conductor is supported by a dielectric material so that it can be maintained on the same center axis as the outer conductor.

Main characteristics

1. Wide band and wide application

Generally, semi rigid cable assemblies can support RF signal transmission within 65GHz, but cable assemblies terminated with 1.0mm connectors can achieve high-frequency applications up to 110GHz. Semi-rigid coaxial cables vary in size from 0.020 inches to 0.250 inches in diameter. Among Rosenberg's products, 0.141 inch, 0.085 inch, and 0.047 inch cables are popular. 0.047-inch diameter cables using smaller connectors are becoming more and more popular with users because they can support higher frequencies. 0.141 inch diameter semi-rigid coaxial cable uses high-frequency SMA or 2.92mm connector, and the application conditions can generally be up to 27GHz. Although 0.086 inch diameter semi-rigid coaxial cable is often used with an SMA connector, when it is terminated by a 1.85 mm connector, its operating frequency can reach 65 GHz.

2. Form and maintain shape

Semi-rigid coaxial cable is a kind of cable that is rigid enough to maintain its shape and flexible enough to be bent manually. For semi rigid cables, in order to fit into the designed system, they often need to be accurately shaped into various shapes. Shaping semi rigid cable into the desired shape is a risky task. In order to prevent damage to the external pipe wall, special tools shall be used to bend or shape the cable. In addition, once such cables are shaped into a specific shape, it is extremely difficult to change their shape again. This is because the shape change often leads to damage to the outer conductor, resulting in the generation of fine lines in the outer wall, which ultimately affects the electrical performance of the cable assembly. Therefore, although such coaxial cables made of aluminum and soft copper are easy to shape and bend manually, it is still recommended to use special tools for such operations in order to minimize the risk of cable damage.

3. Phase stability

As the semi-rigid coaxial cable is made of high-quality materials, it has a very high electrical stability compared with the flexible coaxial cable with a wire braided outer conductor. The characteristics of metal and dielectric materials change with temperature, so the use of phase stabilized cables is very important for many key systems. In addition, semi-rigid cable with phase matching is often used in systems that need to control the phase length. This is especially true for antenna systems equipped with phased array antennas, optical communications, semiconductors, and other test applications.

4. Low intermodulation (PIM)

Micro coax semi rigid cables are usually made of metallic materials (mainly copper). When a suitable connector is selected, such copper tube semi-rigid coaxial cable has excellent passive intermodulation performance, which makes it an ideal choice for modern multi frequency wireless communication systems, including related equipment of distributed antenna systems. With the increasing demand for full coverage, the distributed antenna system market requires more kinds of low passive intermodulation products, including filters, power splitters, amplifiers, and even high-end test equipment. Since the semi rigid cable assembly can simultaneously meet the requirements of RF power and passive intermodulation required by modern wireless communication systems, it has become the preferred product for the above applications.

Advantage

Semi-rigid coaxial cable consists of four parts: core wire, insulator, shielding layer, and outer skin, and is mainly used for communication lines.

The special structure of the semi-rigid rf cable brings us many rare characteristics: the outer conductor of the seamless metal tube is not easy to bend, but it is easy to shape, which is convenient for wiring in the machine, and provides very good shielding characteristics; high-strength The outer conductor also ensures the dimensional stability of the inner structure, making the semi-rigid coaxial cable easy to be made into a high-performance cable assembly.

Application

The semi-rigid cable is generally used to transmit high-frequency signals in mobile communication, military radar, electronic countermeasure, and other systems, and semi-steel cable components are coaxial transmission lines composed of metal tubes.

Testing equipment

Our microwave measurement capability makes us the best choice for the design and manufacturing of your components.

Shipping

We will send the goods to you by DHL, FEDEX, UPS, EMS, AIR, etc. Usually 7-15 working days after receiving your 100% payment. For bulk orders: 15-35 working days after receiving the deposit.

Our service

●Service standards: We are committed to providing a high-quality and responsive service to all clients.

●OEM: Available for waveguide series.

●Stable quality: Implement the whole process of quality control, meticulous and strict inspection!

●Reasonable price: Internal cost control, reducing expenses, benefiting customers!

●Professional selection: More than 5 years of professional engineer selection, to provide you with alternative models of each factory, system solutions

●Fast delivery: Adequate stocking, shortened delivery time!

●Door-to-door service: We usually send the parcel by DHL, EMS, TNT, etc. The tracking number will be sent to you after delivery. It usually takes 3~5working days to reach from our side to your side, which is very convenient for your business.

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