JAG RF stocks many of the most popular 50-ohm coaxial cables (transmission lines) in use today. Transmission lines are devices that guide electromagnetic waves from one place to another. JAG RF stocks a variety of cable sizes because the electrical characteristics of various types of coaxial lines can differ significantly, particularly at microwave frequencies. This is due to the dimensions of the cable and the choice and construction of the dielectric material. JAG RF stocks many grades of coaxial cable from Times Microwave’s LMR-400 to the very high quality Belden 8267, 8268, and 8261. We also stock a variety of high quality military grade Teflon dielectric transmission lines such as RG-142 among others.

Many companies have proprietary brand names for their transmission line products. Andrew Corporation uses the HELIAX system for its coaxial lines, while Eupen uses the HiFlex system for its coaxial lines. Coaxial cables intended for UHF and microwave systems are considerably larger in diameter than those for HF and low band VHF use. In UHF and microwave radio systems, 7/8-inch and 1 5/8-inch cable (diameter of outer conductor with foam or air dielectrics are common. JAG RF stocks a variety of these commonly used high performance solid copper, corrugated outer conductor coaxial cables. One of the advantages of these cables is that the solid copper corrugated outer conductor results in low loss, continuous RFI/EMI shielding to minimize interference and maximize system security. The corrugated outer conductor also allows for ease of handling and installation.

When tuning cavity filters, especially when cascading additional cavity filters together to achieve higher selectivity, the cable lengths between the cavity filters become very important. JAG RF realizes this and provides custom-made cavity filter harnessing for a range of applications from cascaded band-pass filters to multicouplers to combiners to duplexers. Whether it is one critical length cable to join two band-pass or band-reject cavities together for higher selectivity or if you require complex critical length transmitter combiner cabling, JAG RF can do it. We can make cavity harnesses from a variety of cable ranging from RG213/214 to RG142 to LMR400 to Andrew HELIAX and more. Harnesses can be made with crimp type connections to clamp connectors to soldered hard-line and other configurations. JAG RF has a number of proprietary harness designs for duplexers to combiners.

In an ideal transmission line system there would be no mismatch, that is a 50-ohm feeder would feed a 50-ohm antenna; therefore, ensuring maximum power transfer. However, this is not evident in “real life” situations; quite often the feeder may have an impedance of 50-ohms but the terminating load is of different impedance. This will cause a small mismatch to the transmission line. Due to this discontinuity, a reflection occurs causing part of the forward power (going to the antenna) to be reflected back into the transmission line toward the transmitter. This sets up a standing wave in the transmission line and reduces the amount of power radiated by the antenna. JAG RF can manufacture any type of coaxial transformer harness assembly for any scenario a customer may present us with. We also custom design and put together transforms used in RF power dividers and matching transformers for RF amplifier transistor matching. If there is a particular impedance matching problem you may have, JAG RF can provide the solution.

JAG RF stocks a variety of used and refurbished duplexer, transmitter combiner, multicoupler and other filter phasing harnesses. We have bins full of custom made filter cabling from a host of manufacturers such as Sinclair, Decibel Products, TXRX, Telewave, Comprod, Celwave, and more. These harnesses are made from a range of cables from RG-142 to RG-213 and 214. Some cables include Delta crimp type ‘T’ connectors and others feature Delta 90-degree elbow crimp type connectors and some have both. It just depends on what you are looking for. If a particular cable configuration is not in our bins, JAG RF can take apart existing harnesses and clean and re-crimp them to suite your application. If you require maximum shielding, we can provide 360-degree solder joints to all connector bodies to improve isolation between cavities whether the harness is for a duplexer or combiner or band-pass filter.

JAG RF stocks a range of Semi-Rigid Transmission Line and Conformable® Coax high performance coaxial cables for engineering, commercial filter, and antenna work. Semi-rigid coax utilizes a seamless copper tube for the outer conductor, similar to copper water pipe. You need special tools and forming devices to bend and shape it. JAG RF can provide this service and can also provide this coax in aluminum. Aluminum tube is basically the same as semi-rigid except that the outer conductor is aluminum rather than copper. This presents some advantages since it is hand-formable and can be reformed. Detailed engineering drawings, special tooling, and extreme care are required with each assembly. However, this produces the best available transmission line for its intended application. JAG RF also stocks a number of other high performance coaxial cables used in test equipment and in military hardware such as Huber + Suhner Sucoform, Belden RG-402, and Micro-Coax to name a few.