Info about coaxial cable assembly, RF Coaxial cable Assembly, coaxial cable assemblies company, Woven Coaxial Cable Assemblies

Speedy specification for coax cable assemblies

In one single visit, engineers can now cost new projects that include standard RF assemblies, without needing to wait on a response from a third party.

The production of an online datasheet means the user can see immediately what they will receive, and there is no confusion as to whether they have put the right connectors on the coaxial cable assembly.

The software includes 36 popular RF coaxial cables including military-specification RG cables, broadcast coaxial cables and Times Microwave low-loss cables commonly used in GPS, GSM and other wireless communication systems.

Once a coaxial cable is chosen, the program intelligently filters the connectors to ensure that only the applicable set of products is offered.

These include BNC, BNC reverse polarity, Euro, F-type, MCX, mini-UHF, MMCX, N-type, SMA, SMA reverse polarity, SMB, SMC, SMZ, Type 43, TNC and TNC reverse polarity connectors in 50 and 75ohm variants and in a range of straight, right-angle and panel-fixing styles.

Once constructed a cable assembly part number is generated, together with pricing, delivery information - based on interrogating the company's stocks of cables and connectors - and the option to purchase the assembly online.

"The aim of the program is to help users throughout the communication market to design and purchase custom RF coaxial cable assemblies with greater ease and to provide relevant technical support documentation", commented Darren White, Business Development Manager at Gigatronix.

Source about coaxial cable assembly from electronicstalk.com

Power Handling of RF Coaxial cable Assemblies

Two potential failure modes must be considered when determining the power handling capability of an RF coaxial cable:

Peak Power (Voltage Breakdown)
Average or CW Power
The Peak Power (Voltage Breakdown) occurs when the voltage gradient between the coaxial cable center conductor exceeds a limiting value causing the signal to arc across the path of the least resistance. Generally, the path of the least resistance is located at the cable/connection junction. Catastrophic breakdown is not the only problem: the existence of corona, usually around the center conductor, produces other deleterious effects. Corona cutting is a concern with PTFE insulators whereupon the PTFE is eroded causing the formation of cavities (usually without carbonization).

Coaxial cable assemblies are typically rated with the peak power handling much lower than what the interface can handle. To maximize peak power of the cable assembly, a high voltage (HV) connector should be used. A higher voltage potential is achieved by overlapping the dielectric thereby increasing the airline arc path. A drawback to this design is that connectors which are modified in this way generally have greater VSWR at higher frequencies.

If the transmission line has reflections, the voltage and the current along the line will have maximums and minimums. The cause of this nonuniform distribution is superposition of the incident and reflected waves. Breakdown is a function of the maximum voltage. Higher reflection results in lower voltage handling. Even high-performance assemblies with low VSWR can have poor peak power handling if they are connected to an unmatched load. Peak power handling is dependent on frequency since the typical value of VSWR is proportional to the increase in frequency. The most common breakdown at high altitudes (usually greater than 70,000 ft.) is ionization breakdown in the air path. For vacuum and space applications, the main type of breakdown is multipaction breakdown.

For average power rating of a coaxial cable with a pulsed signal, multiply the peak power rating by the duty cycle.

Frequency range, ambient temperature, altitude, physical size, and the thermal properties of each layer of construction are the primary factors which determine the average power handling capability of an RF coaxial cable. The Average Power failure occurs when the level of power transmitted results in resistive and dielectric heating at a rate higher than the rate at which the heat can be conducted away through the different layers of coaxial cable and dissipated from the outermost cable layer to the environment. A buildup of heat energy causes the internal coaxial cable temperature to exceed the maximum rated dielectric temperature. Convection, conduction and radiation are methods to remove heat from the cable assembly. Conduction transfer of heat through the outer and inner conductors of a cable is particularly effective for short assemblies. For very high altitudes and space applications, the air is too thin or nonexistent and convection cooling is ineffective. Heat from the cable assembly can only be removed by radiant heat and conduction.

Astrolab, Inc. has developed a unique computer-modeling program that accurately predicts the power rating for coaxial cables of varying designs and materials. This program was used to generate the charts found in the coaxial cable sections of the Astrolab catalog (see Section C). Power Handling is calculated for convection cooling only. Conduction and radiation are included in the safety margins. These charts provide the CW or Average Power rating for all Astrolab cables versus frequency. The following calculation shows how to use the CW power charts for non-standard temperature conditions.

Source from astrolab.com

RF Coaxial cable Assemblies

Volex offers a full range of RF coaxial cable assemblies including, flexible, conformable, semi-rigid, corrugated and phase matched assemblies.
All our coaxial cable assemblies are engineered to meet the stringent
electrical and mechanical requirements of the latest industry standard specifications.
With our in-house design expertise and state-of-the-art RF test
equipment we can offer a wide variety of RF cable assemblies
designed to your specification. Our products include, standard
coaxial cable assemblies; precision phase matched assemblies manufactured in an environmentally stabilized environment;
and compound data and RF injection molded assemblies. Volex
has the capability and the experience to offer a quality product, manufactured in a flexible and cost competitive environment.

Coaxial Cable Assemblies

Braided cable assembly: RG & Mil specification, Low Loss and High Performance assemblies
Semi-Rigid & Millimeter Wave: Copper or Aluminum, Conformable & Tin Filled braid
Phase Matched assemblies: Delay Lines/Coils
1/4 Wave Stub assemblies
Custom assemblies: manufactured with splitters, combiners
Compound or Hybrid products: manufactured and designed upon request, incl. coax with data cables, molded assemblies, power & RF
Choice of connectors and connector types, cable and cable types available

Source from volex.com

Lots of companies make coaxial cable assemblies.

Why should buy cable assemblies from Florida RS Technology?

We started in business over 13 years ago designing, patenting and manufacturing coaxial cable processing tools. Florida RS Technology tools are widely acknowledged to be the best of thier type. In fact, they are in use all over the world. When you buy coaxial cable assemblies from us you can be confident that they will always be processed with precision tools and put together with the best assemblers in the industry.

Engineers, designers and purchasing managers in the telecommunications, defense contracting, and testing industries trust us every day for their precision cable assembly requirements. They demand and recieve the highest quality coaxial cable assemblies from Florida RS Technology.

Everyone talks about how good their quality is. At Florida RS Technology we put customer satisfaction above all else. Our reject rate for coaxial cable assemblies is less than 0.05% which means that we get it right the first time 99.95% of the time.

Florida RS Technology is nimble and flexible. If you want one coax cable assembly or several thousand we can do it for you, on time, and at a price that is very competitive. We do emergency orders on an expedited basis. It's 9:00am Wednesday and you are in a jam, you need cable assemblies by Thursday before noon, call Florida RS Technology and we will figure out a way to make them and get them to you.

Full article about coaxial cable assembly from flrst.com

Woven Coaxial Cable Assemblies now available from Times Microwave Systems

Times Microwave Systems has recently introduced its woven coaxial cable assembly capability for mobile cell sites and other applications requiring an organized cabling system. Cables are woven together using a variety of materials to maintain a low profile and organized cable configuration. For mobile, emergency and portable cell sites where the cables are unwound and re-wound numerous times, this unique concept speeds up the winding and unwinding process and eliminates tangled and unwieldy cables.

Woven cable assemblies may utilize any of the high performance Times cables including LMR? and TCOM? and can be supplied pre-terminated with high quality Times connectors. Other cable components such as power cords for tower-top lighting can also be incorporated into the woven assembly.

Times Microwave Systems, a Smiths Interconnect company, is the leader in the design and manufacture of coaxial cables for RF and microwave applications. For further information regarding Times Microwave Systems LMR? cables, connectors and assemblies, please contact Kevin Moyher on 203-949-8447.

More coaxial cable news from news.thomasnet.com