Information for ruling 600011944
This section is Advance Tariff Ruling
- Start date
- 07 Jan 2025
- Expiry date
- 06 Jan 2028
- Commodity code
- 8517710000 (opens in new tab)
- Description
- A Rotary Joint which is a mechanical device that allows the transmission of electrical signals between a rotating component and a stationary component without disrupting the flow or causing wear over time. They are used in satellite communications to allow signals to pass between a rotating antenna (to track a moving satellite or maintain signal alignment) and the fixed parts of the ground system. The joint plays a vital role in ensuring the overall functionality and efficiency of satellite communication systems by ensuring the uninterrupted transfer of RF signals. Whether coaxial or waveguide rotary joints they both serve the purpose of transferring RF signals between rotating and stationary parts, but differ in terms of the type of signal transmission medium, their frequency range, power handling capacity, size, and efficiency. Waveguide rotary joints are used for high frequency and high-power RF and microwave signals with very minimal signal/insertion loss. The waveguide size is selected based on the frequency of operation. The two connection interfaces are available in several geometric configurations/ layouts e.g F Type, U Type, L Type and I Type. A waveguide rotary joint typically consists of a fixed port that connects to the stationary part of the system, a mechanical interface that allows one part of the joint to rotate relative to the other and the actual path through which the electromagnetic wave travels, usually a metal tube that confines and guides the wave. Sliding contacts or couplings are used to ensure that the electrical connection remains intact between the rotating and stationary parts of the system. To avoid signal loss and to allow smooth rotation, rotary joints often use seals, bearings, and brushes that maintain the integrity of the connection while minimizing friction and wear.
- Keywords
-
- ROTARY
- FOR TELECOMMUNICATIONS
- ALUMINIUM
- PART OF
- FOR TRANSMISSION VIA SATELLITE
- FOR COMMUNICATION
- FOR TRANSMISSION OF SIGNALS
- Justification
- Classification has been determined in accordance with the following: For the purposes of determining the commodity codes within which goods most appropriately fall, reg 3 (1) of The Customs Tariff (Establishment) (EU Exit) Regulations 2020 sets out that the rules of interpretation contained in the following have effect – a. Part Two (Goods Classification Table Rules of Interpretation) of the Tariff of the United Kingdom (Reg 3(1)(a)); and b. Notes to a section or chapter of the Goods Classification Table (Reg 3(1)(b)). General Interpretative Rules (GIRS): GIR 1 has been used to classify this product by the terms of Heading 8517 - Telephone sets, including smartphones and other telephones for cellular networks or for other wireless networks; other apparatus for the transmission or reception of voice, images or other data, including apparatus for communication in a wired or wireless network (such as a local or wide area network), other than transmission or reception apparatus of heading 8443, 8525, 8527 or 8528 GIR 6 has been used to classify this product to subheading level 851771 - Parts; Aerials and aerial reflectors of all kinds; parts suitable for use therewith Also classified in accordance with: Harmonised System Explanatory Notes (HSENs) to Heading 8517 and Note 2(b) to Section XVI