Koaxis manufactures small diameter coaxial RF microwave cable assemblies for high-performance applications such as High Frequency, Phase-matched, Delay Matched, Bent Semi-rigid, Test and Measurement Applications and more.
Semi-rigid coaxial cable is the preferred choice for improved isolation, a broader temperature range, and improved VSWR for Inside the Box applications. When bent to shape, semi-rigid maintains it's shape and performance even under shock and vibration.
Koaxis uses and stocks a large inventory of Mil-DTL-17 semi-rigid cable primarily from Micro-coax as the cable is drawn in straight lengths which reduces the need for additional labor to straighten the material. With 5 different sets of equipment for bending semi-rigid available in-house; including custom-made CNC bender, dedicated quick-turn setups, and custom-made bend fixtures; Koaxis chooses the most cost-effective and fastest method for each cable to ensure an economical and readily available solution.
It is important to understand that semi-rigid is a drawn tube, typically available in plated or unplated Copper or plated Aluminum. It is not synonymous with hand-formable (aka Semi-fliex®) cable, which is typically a Tin-dipped Copper braided cable. Additionally, RG401, RG402, and RG405 are NOT synonymous with their respective 250", .141", and .086" diameters. M17/129-RG401, M17/130-RG402, and M17/133-RG405 are specific grades of bare Copper semi-rigid cable that are popular in space and airborn applications.
Koaxis offers a variety of custom marking options for your assemblies. Using state of the art printers, we create markers on heat-shrink tubing consisting of 1 or 2 lines of text. Whether you need multiple markers, colored markers, serial numbers, CAGE code or more, Koaxis can mark your assemblies.
When specifying cable markings, Koaxis recommends the following best practice:
Delay-matching is similar to phase matching, but uses time delay measured in picoseconds, to match the cables. Our standard delay tolerance is ±1 picosecond for cable lengths up to 3 feet. Tighter tolerances are possible, contact us to discuss.
Tighter tolerances are possible, contact us to discuss.
Koaxis is primarily a supplier of small diameter cable assemblies and thus does not have much of an offering for phase v flexure applications. We are actively working on a .047 diameter cable with improved stability with flexure. As this product becomes available we will update this page.
While PTFE is the workhorse dielectric in the RF / Microwave world because of its high dielectric strength and low dielectric constant, at room temperature it goes through a structural change known as the "teflon knee" . This causes a significant shift in phase as it moves through this temperature zone. We are currently supplying 3 flexible cables to address this temperature phase shift using a foam fluoropolymer dielectric. See our low loss KF047P, KF086P and KF120P cables.
We will be introducing semi-rigid versions of this cable in .047, .086 and .120 sizes in the future.
When your application requires multiple signals to arrive at the receiver in-phase, you need a cable that provides consistent and predictable phase-changes as the ambient temperature changes. Koaxis K-Flex 120 cable provides superior phase-tracking vs temperature without the high cost associated with phase-stable vs temperature cable. Currently, in service in several array applications, K-Flex 120 provides outstanding low-loss and phase-tracking vs temperature performance from DC-40 GHz.
AccuTest®, PhaseMaster®, and Storm Flex® are registered trademarks of Storm Products
Flexiform® cable is a registered trademark of Habia Cable
GPO® GPPO® and G3PO® connectors are registered trademarks of Corning Gilbert
GrooveTube® is a registered trademark of MegaPhase
K Connectors® and V Connectors® are registered trademarks of Anritsu
LMR®, PhaseTrack®, Tflex® cables are registered trademarks of Times Microwave
Microbend® and Minibend® cables are registered trademarks of Astrolab
TF4™ dielectric is a trademark of Times Microwave
PhaseFlex® is a registered trademark of Gore
M-flex®, Utiflex®, and Utiform® cables are registered trademarks of Micro-coax
SemiFlex® cable is a registered trademark of Carlisle IT
Sucoform® cable is a registered trademarks of Huber+Suhner
VITA 67 is a designation created and maintained by VITA